Metadata-Version: 2.1
Name: pydantic
Version: 2.5.0
Summary: Data validation using Python type hints
Project-URL: Homepage, https://github.com/pydantic/pydantic
Project-URL: Documentation, https://docs.pydantic.dev
Project-URL: Funding, https://github.com/sponsors/samuelcolvin
Project-URL: Source, https://github.com/pydantic/pydantic
Project-URL: Changelog, https://docs.pydantic.dev/latest/changelog/
Author-email: Samuel Colvin <s@muelcolvin.com>, Eric Jolibois <em.jolibois@gmail.com>, Hasan Ramezani <hasan.r67@gmail.com>, Adrian Garcia Badaracco <1755071+adriangb@users.noreply.github.com>, Terrence Dorsey <terry@pydantic.dev>, David Montague <david@pydantic.dev>, Serge Matveenko <lig@countzero.co>, Marcelo Trylesinski <marcelotryle@gmail.com>, Sydney Runkle <sydneymarierunkle@gmail.com>, David Hewitt <mail@davidhewitt.io>
License-Expression: MIT
License-File: LICENSE
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Console
Classifier: Environment :: MacOS X
Classifier: Framework :: Hypothesis
Classifier: Framework :: Pydantic
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Information Technology
Classifier: Intended Audience :: System Administrators
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: POSIX :: Linux
Classifier: Operating System :: Unix
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Programming Language :: Python :: Implementation :: CPython
Classifier: Programming Language :: Python :: Implementation :: PyPy
Classifier: Topic :: Internet
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Requires-Python: >=3.7
Requires-Dist: annotated-types>=0.4.0
Requires-Dist: importlib-metadata; python_version == '3.7'
Requires-Dist: pydantic-core==2.14.1
Requires-Dist: typing-extensions>=4.6.1
Provides-Extra: email
Requires-Dist: email-validator>=2.0.0; extra == 'email'
Description-Content-Type: text/markdown

# Pydantic

[![CI](https://github.com/pydantic/pydantic/workflows/CI/badge.svg?event=push)](https://github.com/pydantic/pydantic/actions?query=event%3Apush+branch%3Amain+workflow%3ACI)
[![Coverage](https://coverage-badge.samuelcolvin.workers.dev/pydantic/pydantic.svg)](https://coverage-badge.samuelcolvin.workers.dev/redirect/pydantic/pydantic)
[![pypi](https://img.shields.io/pypi/v/pydantic.svg)](https://pypi.python.org/pypi/pydantic)
[![CondaForge](https://img.shields.io/conda/v/conda-forge/pydantic.svg)](https://anaconda.org/conda-forge/pydantic)
[![downloads](https://static.pepy.tech/badge/pydantic/month)](https://pepy.tech/project/pydantic)
[![versions](https://img.shields.io/pypi/pyversions/pydantic.svg)](https://github.com/pydantic/pydantic)
[![license](https://img.shields.io/github/license/pydantic/pydantic.svg)](https://github.com/pydantic/pydantic/blob/main/LICENSE)
[![Pydantic v2](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/pydantic/pydantic/main/docs/badge/v2.json)](https://docs.pydantic.dev/latest/contributing/#badges)

Data validation using Python type hints.

Fast and extensible, Pydantic plays nicely with your linters/IDE/brain.
Define how data should be in pure, canonical Python 3.7+; validate it with Pydantic.

## Pydantic Company :rocket:

We've started a company based on the principles that I believe have led to Pydantic's success.
Learning more from the [Company Announcement](https://pydantic.dev/announcement/).

## Pydantic V1.10 vs. V2

Pydantic V2 is a ground-up rewrite that offers many new features, performance improvements, and some breaking changes compared to Pydantic V1.

If you're using Pydantic V1 you may want to look at the
[pydantic V1.10 Documentation](https://docs.pydantic.dev/) or,
[`1.10.X-fixes` git branch](https://github.com/pydantic/pydantic/tree/1.10.X-fixes). Pydantic V2 also ships with the latest version of Pydantic V1 built in so that you can incrementally upgrade your code base and projects: `from pydantic import v1 as pydantic_v1`.

## Help

See [documentation](https://docs.pydantic.dev/) for more details.

## Installation

Install using `pip install -U pydantic` or `conda install pydantic -c conda-forge`.
For more installation options to make Pydantic even faster,
see the [Install](https://docs.pydantic.dev/install/) section in the documentation.

## A Simple Example

```py
from datetime import datetime
from typing import List, Optional
from pydantic import BaseModel

class User(BaseModel):
    id: int
    name: str = 'John Doe'
    signup_ts: Optional[datetime] = None
    friends: List[int] = []

external_data = {'id': '123', 'signup_ts': '2017-06-01 12:22', 'friends': [1, '2', b'3']}
user = User(**external_data)
print(user)
#> User id=123 name='John Doe' signup_ts=datetime.datetime(2017, 6, 1, 12, 22) friends=[1, 2, 3]
print(user.id)
#> 123
```

## Contributing

For guidance on setting up a development environment and how to make a
contribution to Pydantic, see
[Contributing to Pydantic](https://docs.pydantic.dev/contributing/).

## Reporting a Security Vulnerability

See our [security policy](https://github.com/pydantic/pydantic/security/policy).

## Changelog

## v2.5.0 (2023-11-13)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.5.0)

The code released in v2.5.0 is functionally identical to that of v2.5.0b1.

### What's Changed

#### Packaging

* Update pydantic-core from 2.10.1 to 2.14.1, significant changes from these updates are described below, full changelog [here](https://github.com/pydantic/pydantic-core/compare/v2.10.1...v2.14.1)
* Update to `pyright==1.1.335` by [@Viicos](https://github.com/Viicos) in [#8075](https://github.com/pydantic/pydantic/pull/8075)

#### New Features

* Allow plugins to catch non `ValidationError` errors by [@adriangb](https://github.com/adriangb) in [#7806](https://github.com/pydantic/pydantic/pull/7806)
* Support `__doc__` argument in `create_model()` by [@chris-spann](https://github.com/chris-spann) in [#7863](https://github.com/pydantic/pydantic/pull/7863)
* Expose `regex_engine` flag - meaning you can use with the Rust or Python regex libraries in constraints by [@utkini](https://github.com/utkini) in [#7768](https://github.com/pydantic/pydantic/pull/7768)
* Save return type generated from type annotation in `ComputedFieldInfo` by [@alexmojaki](https://github.com/alexmojaki) in [#7889](https://github.com/pydantic/pydantic/pull/7889)
* Adopting `ruff` formatter by [@Luca-Blight](https://github.com/Luca-Blight) in [#7930](https://github.com/pydantic/pydantic/pull/7930)
* Added `validation_error_cause` to config by [@zakstucke](https://github.com/zakstucke) in [#7626](https://github.com/pydantic/pydantic/pull/7626)
* Make path of the item to validate available in plugin by [@hramezani](https://github.com/hramezani) in [#7861](https://github.com/pydantic/pydantic/pull/7861)
* Add `CallableDiscriminator` and `Tag` by [@dmontagu](https://github.com/dmontagu) in [#7983](https://github.com/pydantic/pydantic/pull/7983)
* Make union case tags affect union error messages by [@dmontagu](https://github.com/dmontagu) in [#8001](https://github.com/pydantic/pydantic/pull/8001)
* Add `examples` and `json_schema_extra` to `@computed_field` by [@alexmojaki](https://github.com/alexmojaki) in [#8013](https://github.com/pydantic/pydantic/pull/8013)
* Add `JsonValue` type by [@dmontagu](https://github.com/dmontagu) in [#7998](https://github.com/pydantic/pydantic/pull/7998)
* Allow `str` as argument to `Discriminator` by [@dmontagu](https://github.com/dmontagu) in [#8047](https://github.com/pydantic/pydantic/pull/8047)
* Add `SchemaSerializer.__reduce__` method to enable pickle serialization by [@edoakes](https://github.com/edoakes) in [pydantic/pydantic-core#1006](https://github.com/pydantic/pydantic-core/pull/1006)

#### Changes

* **Significant Change:** replace `ultra_strict` with new smart union implementation, the way unions are validated has changed significantly to improve performance and correctness, we have worked hard to absolutely minimise the number of cases where behaviour has changed, see the PR for details - by [@davidhewitt](https://github.com/davidhewitt) in [pydantic/pydantic-core#867](https://github.com/pydantic/pydantic-core/pull/867)
* Add support for instance method reassignment when `extra='allow'` by [@sydney-runkle](https://github.com/sydney-runkle) in [#7683](https://github.com/pydantic/pydantic/pull/7683)
* Support JSON schema generation for `Enum` types with no cases by [@sydney-runkle](https://github.com/sydney-runkle) in [#7927](https://github.com/pydantic/pydantic/pull/7927)
* Warn if a class inherits from `Generic` before `BaseModel` by [@alexmojaki](https://github.com/alexmojaki) in [#7891](https://github.com/pydantic/pydantic/pull/7891)

#### Performance

* New custom JSON parser, `jiter` by [@samuelcolvin](https://github.com/samuelcolvin) in [pydantic/pydantic-core#974](https://github.com/pydantic/pydantic-core/pull/974)
* PGO build for MacOS M1 by [@samuelcolvin](https://github.com/samuelcolvin) in [pydantic/pydantic-core#1063](https://github.com/pydantic/pydantic-core/pull/1063)
* Use `__getattr__` for all package imports, improve import time by [@samuelcolvin](https://github.com/samuelcolvin) in [#7947](https://github.com/pydantic/pydantic/pull/7947)

#### Fixes

* Fix `mypy` issue with subclasses of `RootModel` by [@sydney-runkle](https://github.com/sydney-runkle) in [#7677](https://github.com/pydantic/pydantic/pull/7677)
* Properly rebuild the `FieldInfo` when a forward ref gets evaluated by [@dmontagu](https://github.com/dmontagu) in [#7698](https://github.com/pydantic/pydantic/pull/7698)
* Fix failure to load `SecretStr` from JSON (regression in v2.4) by [@sydney-runkle](https://github.com/sydney-runkle) in [#7729](https://github.com/pydantic/pydantic/pull/7729)
* Fix `defer_build` behavior with `TypeAdapter` by [@sydney-runkle](https://github.com/sydney-runkle) in [#7736](https://github.com/pydantic/pydantic/pull/7736)
* Improve compatibility with legacy `mypy` versions by [@dmontagu](https://github.com/dmontagu) in [#7742](https://github.com/pydantic/pydantic/pull/7742)
* Fix: update `TypeVar` handling when default is not set by [@pmmmwh](https://github.com/pmmmwh) in [#7719](https://github.com/pydantic/pydantic/pull/7719)
* Support specification of `strict` on `Enum` type fields by [@sydney-runkle](https://github.com/sydney-runkle) in [#7761](https://github.com/pydantic/pydantic/pull/7761)
* Wrap `weakref.ref` instead of subclassing to fix `cloudpickle` serialization by [@edoakes](https://github.com/edoakes) in [#7780](https://github.com/pydantic/pydantic/pull/7780)
* Keep values of private attributes set within `model_post_init` in subclasses by [@alexmojaki](https://github.com/alexmojaki) in [#7775](https://github.com/pydantic/pydantic/pull/7775)
* Add more specific type for non-callable `json_schema_extra` by [@alexmojaki](https://github.com/alexmojaki) in [#7803](https://github.com/pydantic/pydantic/pull/7803)
* Raise an error when deleting frozen (model) fields by [@alexmojaki](https://github.com/alexmojaki) in [#7800](https://github.com/pydantic/pydantic/pull/7800)
* Fix schema sorting bug with default values by [@sydney-runkle](https://github.com/sydney-runkle) in [#7817](https://github.com/pydantic/pydantic/pull/7817)
* Use generated alias for aliases that are not specified otherwise by [@alexmojaki](https://github.com/alexmojaki) in [#7802](https://github.com/pydantic/pydantic/pull/7802)
* Support `strict` specification for `UUID` types by [@sydney-runkle](https://github.com/sydney-runkle) in [#7865](https://github.com/pydantic/pydantic/pull/7865)
* JSON schema: fix extra parameter handling by [@me-and](https://github.com/me-and) in [#7810](https://github.com/pydantic/pydantic/pull/7810)
* Fix: support `pydantic.Field(kw_only=True)` with inherited dataclasses by [@PrettyWood](https://github.com/PrettyWood) in [#7827](https://github.com/pydantic/pydantic/pull/7827)
* Support `validate_call` decorator for methods in classes with `__slots__` by [@sydney-runkle](https://github.com/sydney-runkle) in [#7883](https://github.com/pydantic/pydantic/pull/7883)
* Fix pydantic dataclass problem with `dataclasses.field` default by [@hramezani](https://github.com/hramezani) in [#7898](https://github.com/pydantic/pydantic/pull/7898)
* Fix schema generation for generics with union type bounds by [@sydney-runkle](https://github.com/sydney-runkle) in [#7899](https://github.com/pydantic/pydantic/pull/7899)
* Fix version for `importlib_metadata` on python 3.7 by [@sydney-runkle](https://github.com/sydney-runkle) in [#7904](https://github.com/pydantic/pydantic/pull/7904)
* Support `|` operator (Union) in PydanticRecursiveRef by [@alexmojaki](https://github.com/alexmojaki) in [#7892](https://github.com/pydantic/pydantic/pull/7892)
* Fix `display_as_type` for `TypeAliasType` in python 3.12 by [@dmontagu](https://github.com/dmontagu) in [#7929](https://github.com/pydantic/pydantic/pull/7929)
* Add support for `NotRequired` generics in `TypedDict` by [@sydney-runkle](https://github.com/sydney-runkle) in [#7932](https://github.com/pydantic/pydantic/pull/7932)
* Make generic `TypeAliasType` specifications produce different schema definitions by [@alexdrydew](https://github.com/alexdrydew) in [#7893](https://github.com/pydantic/pydantic/pull/7893)
* Added fix for signature of inherited dataclass by [@howsunjow](https://github.com/howsunjow) in [#7925](https://github.com/pydantic/pydantic/pull/7925)
* Make the model name generation more robust in JSON schema by [@joakimnordling](https://github.com/joakimnordling) in [#7881](https://github.com/pydantic/pydantic/pull/7881)
* Fix plurals in validation error messages (in tests) by [@Iipin](https://github.com/Iipin) in [#7972](https://github.com/pydantic/pydantic/pull/7972)
* `PrivateAttr` is passed from `Annotated` default position by [@tabassco](https://github.com/tabassco) in [#8004](https://github.com/pydantic/pydantic/pull/8004)
* Don't decode bytes (which may not be UTF8) when displaying SecretBytes by [@alexmojaki](https://github.com/alexmojaki) in [#8012](https://github.com/pydantic/pydantic/pull/8012)
* Use `classmethod` instead of `classmethod[Any, Any, Any]` by [@Mr-Pepe](https://github.com/Mr-Pepe) in [#7979](https://github.com/pydantic/pydantic/pull/7979)
* Clearer error on invalid Plugin by [@samuelcolvin](https://github.com/samuelcolvin) in [#8023](https://github.com/pydantic/pydantic/pull/8023)
* Correct pydantic dataclasses import by [@samuelcolvin](https://github.com/samuelcolvin) in [#8027](https://github.com/pydantic/pydantic/pull/8027)
* Fix misbehavior for models referencing redefined type aliases by [@dmontagu](https://github.com/dmontagu) in [#8050](https://github.com/pydantic/pydantic/pull/8050)
* Fix `Optional` field with `validate_default` only performing one field validation by [@sydney-runkle](https://github.com/sydney-runkle) in [pydantic/pydantic-core#1002](https://github.com/pydantic/pydantic-core/pull/1002)
* Fix `definition-ref` bug with `Dict` keys by [@sydney-runkle](https://github.com/sydney-runkle) in [pydantic/pydantic-core#1014](https://github.com/pydantic/pydantic-core/pull/1014)
* Fix bug allowing validation of `bool` types with `coerce_numbers_to_str=True` by [@sydney-runkle](https://github.com/sydney-runkle) in [pydantic/pydantic-core#1017](https://github.com/pydantic/pydantic-core/pull/1017)
* Don't accept `NaN` in float and decimal constraints by [@davidhewitt](https://github.com/davidhewitt) in [pydantic/pydantic-core#1037](https://github.com/pydantic/pydantic-core/pull/1037)
* Add `lax_str` and `lax_int` support for enum values not inherited from str/int by [@michaelhly](https://github.com/michaelhly) in [pydantic/pydantic-core#1015](https://github.com/pydantic/pydantic-core/pull/1015)
* Support subclasses in lists in `Union` of `List` types by [@sydney-runkle](https://github.com/sydney-runkle) in [pydantic/pydantic-core#1039](https://github.com/pydantic/pydantic-core/pull/1039)
* Allow validation against `max_digits` and `decimals` to pass if normalized or non-normalized input is valid by [@sydney-runkle](https://github.com/sydney-runkle) in [pydantic/pydantic-core#1049](https://github.com/pydantic/pydantic-core/pull/1049)
* Fix: proper pluralization in `ValidationError` messages by [@Iipin](https://github.com/Iipin) in [pydantic/pydantic-core#1050](https://github.com/pydantic/pydantic-core/pull/1050)
* Disallow the string `'-'` as `datetime` input by [@davidhewitt](https://github.com/davidhewitt) in [pydantic/speedate#52](https://github.com/pydantic/speedate/pull/52) & [pydantic/pydantic-core#1060](https://github.com/pydantic/pydantic-core/pull/1060)
* Fix: NaN and Inf float serialization by [@davidhewitt](https://github.com/davidhewitt) in [pydantic/pydantic-core#1062](https://github.com/pydantic/pydantic-core/pull/1062)
* Restore manylinux-compatible PGO builds by [@davidhewitt](https://github.com/davidhewitt) in [pydantic/pydantic-core#1068](https://github.com/pydantic/pydantic-core/pull/1068)

### New Contributors

#### `pydantic`
* [@schneebuzz](https://github.com/schneebuzz) made their first contribution in [#7699](https://github.com/pydantic/pydantic/pull/7699)
* [@edoakes](https://github.com/edoakes) made their first contribution in [#7780](https://github.com/pydantic/pydantic/pull/7780)
* [@alexmojaki](https://github.com/alexmojaki) made their first contribution in [#7775](https://github.com/pydantic/pydantic/pull/7775)
* [@NickG123](https://github.com/NickG123) made their first contribution in [#7751](https://github.com/pydantic/pydantic/pull/7751)
* [@gowthamgts](https://github.com/gowthamgts) made their first contribution in [#7830](https://github.com/pydantic/pydantic/pull/7830)
* [@jamesbraza](https://github.com/jamesbraza) made their first contribution in [#7848](https://github.com/pydantic/pydantic/pull/7848)
* [@laundmo](https://github.com/laundmo) made their first contribution in [#7850](https://github.com/pydantic/pydantic/pull/7850)
* [@rahmatnazali](https://github.com/rahmatnazali) made their first contribution in [#7870](https://github.com/pydantic/pydantic/pull/7870)
* [@waterfountain1996](https://github.com/waterfountain1996) made their first contribution in [#7878](https://github.com/pydantic/pydantic/pull/7878)
* [@chris-spann](https://github.com/chris-spann) made their first contribution in [#7863](https://github.com/pydantic/pydantic/pull/7863)
* [@me-and](https://github.com/me-and) made their first contribution in [#7810](https://github.com/pydantic/pydantic/pull/7810)
* [@utkini](https://github.com/utkini) made their first contribution in [#7768](https://github.com/pydantic/pydantic/pull/7768)
* [@bn-l](https://github.com/bn-l) made their first contribution in [#7744](https://github.com/pydantic/pydantic/pull/7744)
* [@alexdrydew](https://github.com/alexdrydew) made their first contribution in [#7893](https://github.com/pydantic/pydantic/pull/7893)
* [@Luca-Blight](https://github.com/Luca-Blight) made their first contribution in [#7930](https://github.com/pydantic/pydantic/pull/7930)
* [@howsunjow](https://github.com/howsunjow) made their first contribution in [#7925](https://github.com/pydantic/pydantic/pull/7925)
* [@joakimnordling](https://github.com/joakimnordling) made their first contribution in [#7881](https://github.com/pydantic/pydantic/pull/7881)
* [@icfly2](https://github.com/icfly2) made their first contribution in [#7976](https://github.com/pydantic/pydantic/pull/7976)
* [@Yummy-Yums](https://github.com/Yummy-Yums) made their first contribution in [#8003](https://github.com/pydantic/pydantic/pull/8003)
* [@Iipin](https://github.com/Iipin) made their first contribution in [#7972](https://github.com/pydantic/pydantic/pull/7972)
* [@tabassco](https://github.com/tabassco) made their first contribution in [#8004](https://github.com/pydantic/pydantic/pull/8004)
* [@Mr-Pepe](https://github.com/Mr-Pepe) made their first contribution in [#7979](https://github.com/pydantic/pydantic/pull/7979)
* [@0x00cl](https://github.com/0x00cl) made their first contribution in [#8010](https://github.com/pydantic/pydantic/pull/8010)
* [@barraponto](https://github.com/barraponto) made their first contribution in [#8032](https://github.com/pydantic/pydantic/pull/8032)

#### `pydantic-core`
* [@sisp](https://github.com/sisp) made their first contribution in [pydantic/pydantic-core#995](https://github.com/pydantic/pydantic-core/pull/995)
* [@michaelhly](https://github.com/michaelhly) made their first contribution in [pydantic/pydantic-core#1015](https://github.com/pydantic/pydantic-core/pull/1015)

## v2.5.0b1 (2023-11-09)

Pre-release, see [the GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.5.0b1) for details.

## v2.4.2 (2023-09-27)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.4.2)

### What's Changed

#### Fixes

* Fix bug with JSON schema for sequence of discriminated union by [@dmontagu](https://github.com/dmontagu) in [#7647](https://github.com/pydantic/pydantic/pull/7647)
* Fix schema references in discriminated unions by [@adriangb](https://github.com/adriangb) in [#7646](https://github.com/pydantic/pydantic/pull/7646)
* Fix json schema generation for recursive models by [@adriangb](https://github.com/adriangb) in [#7653](https://github.com/pydantic/pydantic/pull/7653)
* Fix `models_json_schema` for generic models by [@adriangb](https://github.com/adriangb) in [#7654](https://github.com/pydantic/pydantic/pull/7654)
* Fix xfailed test for generic model signatures by [@adriangb](https://github.com/adriangb) in [#7658](https://github.com/pydantic/pydantic/pull/7658)

### New Contributors

* [@austinorr](https://github.com/austinorr) made their first contribution in [#7657](https://github.com/pydantic/pydantic/pull/7657)
* [@peterHoburg](https://github.com/peterHoburg) made their first contribution in [#7670](https://github.com/pydantic/pydantic/pull/7670)

## v2.4.1 (2023-09-26)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.4.1)

### What's Changed

#### Packaging

* Update pydantic-core to 2.10.1 by [@davidhewitt](https://github.com/davidhewitt) in [#7633](https://github.com/pydantic/pydantic/pull/7633)

#### Fixes

* Serialize unsubstituted type vars as `Any` by [@adriangb](https://github.com/adriangb) in [#7606](https://github.com/pydantic/pydantic/pull/7606)
* Remove schema building caches by [@adriangb](https://github.com/adriangb) in [#7624](https://github.com/pydantic/pydantic/pull/7624)
* Fix an issue where JSON schema extras weren't JSON encoded by [@dmontagu](https://github.com/dmontagu) in [#7625](https://github.com/pydantic/pydantic/pull/7625)

## v2.4.0 (2023-09-22)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.4.0)

### What's Changed

#### Packaging

* Update pydantic-core to 2.10.0 by [@samuelcolvin](https://github.com/samuelcolvin) in [#7542](https://github.com/pydantic/pydantic/pull/7542)

#### New Features

* Add `Base64Url` types by [@dmontagu](https://github.com/dmontagu) in [#7286](https://github.com/pydantic/pydantic/pull/7286)
* Implement optional `number` to `str` coercion by [@lig](https://github.com/lig) in [#7508](https://github.com/pydantic/pydantic/pull/7508)
* Allow access to `field_name` and `data` in all validators if there is data and a field name by [@samuelcolvin](https://github.com/samuelcolvin) in [#7542](https://github.com/pydantic/pydantic/pull/7542)
* Add `BaseModel.model_validate_strings` and `TypeAdapter.validate_strings` by [@hramezani](https://github.com/hramezani) in [#7552](https://github.com/pydantic/pydantic/pull/7552)
* Add Pydantic `plugins` experimental implementation by [@lig](https://github.com/lig) [@samuelcolvin](https://github.com/samuelcolvin) and [@Kludex](https://github.com/Kludex) in [#6820](https://github.com/pydantic/pydantic/pull/6820)

#### Changes

* Do not override `model_post_init` in subclass with private attrs by [@Viicos](https://github.com/Viicos) in [#7302](https://github.com/pydantic/pydantic/pull/7302)
* Make fields with defaults not required in the serialization schema by default by [@dmontagu](https://github.com/dmontagu) in [#7275](https://github.com/pydantic/pydantic/pull/7275)
* Mark `Extra` as deprecated by [@disrupted](https://github.com/disrupted) in [#7299](https://github.com/pydantic/pydantic/pull/7299)
* Make `EncodedStr` a dataclass by [@Kludex](https://github.com/Kludex) in [#7396](https://github.com/pydantic/pydantic/pull/7396)
* Move `annotated_handlers` to be public by [@samuelcolvin](https://github.com/samuelcolvin) in [#7569](https://github.com/pydantic/pydantic/pull/7569)

#### Performance

* Simplify flattening and inlining of `CoreSchema` by [@adriangb](https://github.com/adriangb) in [#7523](https://github.com/pydantic/pydantic/pull/7523)
* Remove unused copies in `CoreSchema` walking by [@adriangb](https://github.com/adriangb) in [#7528](https://github.com/pydantic/pydantic/pull/7528)
* Add caches for collecting definitions and invalid schemas from a CoreSchema by [@adriangb](https://github.com/adriangb) in [#7527](https://github.com/pydantic/pydantic/pull/7527)
* Eagerly resolve discriminated unions and cache cases where we can't by [@adriangb](https://github.com/adriangb) in [#7529](https://github.com/pydantic/pydantic/pull/7529)
* Replace `dict.get` and `dict.setdefault` with more verbose versions in `CoreSchema` building hot paths by [@adriangb](https://github.com/adriangb) in [#7536](https://github.com/pydantic/pydantic/pull/7536)
* Cache invalid `CoreSchema` discovery by [@adriangb](https://github.com/adriangb) in [#7535](https://github.com/pydantic/pydantic/pull/7535)
* Allow disabling `CoreSchema` validation for faster startup times by [@adriangb](https://github.com/adriangb) in [#7565](https://github.com/pydantic/pydantic/pull/7565)

#### Fixes

* Fix config detection for `TypedDict` from grandparent classes by [@dmontagu](https://github.com/dmontagu) in [#7272](https://github.com/pydantic/pydantic/pull/7272)
* Fix hash function generation for frozen models with unusual MRO by [@dmontagu](https://github.com/dmontagu) in [#7274](https://github.com/pydantic/pydantic/pull/7274)
* Make `strict` config overridable in field for Path by [@hramezani](https://github.com/hramezani) in [#7281](https://github.com/pydantic/pydantic/pull/7281)
* Use `ser_json_<timedelta|bytes>` on default in `GenerateJsonSchema` by [@Kludex](https://github.com/Kludex) in [#7269](https://github.com/pydantic/pydantic/pull/7269)
* Adding a check that alias is validated as an identifier for Python by [@andree0](https://github.com/andree0) in [#7319](https://github.com/pydantic/pydantic/pull/7319)
* Raise an error when computed field overrides field by [@sydney-runkle](https://github.com/sydney-runkle) in [#7346](https://github.com/pydantic/pydantic/pull/7346)
* Fix applying `SkipValidation` to referenced schemas by [@adriangb](https://github.com/adriangb) in [#7381](https://github.com/pydantic/pydantic/pull/7381)
* Enforce behavior of private attributes having double leading underscore by [@lig](https://github.com/lig) in [#7265](https://github.com/pydantic/pydantic/pull/7265)
* Standardize `__get_pydantic_core_schema__` signature by [@hramezani](https://github.com/hramezani) in [#7415](https://github.com/pydantic/pydantic/pull/7415)
* Fix generic dataclass fields mutation bug (when using `TypeAdapter`) by [@sydney-runkle](https://github.com/sydney-runkle) in [#7435](https://github.com/pydantic/pydantic/pull/7435)
* Fix `TypeError` on `model_validator` in `wrap` mode by [@pmmmwh](https://github.com/pmmmwh) in [#7496](https://github.com/pydantic/pydantic/pull/7496)
* Improve enum error message by [@hramezani](https://github.com/hramezani) in [#7506](https://github.com/pydantic/pydantic/pull/7506)
* Make `repr` work for instances that failed initialization when handling `ValidationError`s by [@dmontagu](https://github.com/dmontagu) in [#7439](https://github.com/pydantic/pydantic/pull/7439)
* Fixed a regular expression denial of service issue by limiting whitespaces by [@prodigysml](https://github.com/prodigysml) in [#7360](https://github.com/pydantic/pydantic/pull/7360)
* Fix handling of `UUID` values having `UUID.version=None` by [@lig](https://github.com/lig) in [#7566](https://github.com/pydantic/pydantic/pull/7566)
* Fix `__iter__` returning private `cached_property` info by [@sydney-runkle](https://github.com/sydney-runkle) in [#7570](https://github.com/pydantic/pydantic/pull/7570)
* Improvements to version info message by [@samuelcolvin](https://github.com/samuelcolvin) in [#7594](https://github.com/pydantic/pydantic/pull/7594)

### New Contributors
* [@15498th](https://github.com/15498th) made their first contribution in [#7238](https://github.com/pydantic/pydantic/pull/7238)
* [@GabrielCappelli](https://github.com/GabrielCappelli) made their first contribution in [#7213](https://github.com/pydantic/pydantic/pull/7213)
* [@tobni](https://github.com/tobni) made their first contribution in [#7184](https://github.com/pydantic/pydantic/pull/7184)
* [@redruin1](https://github.com/redruin1) made their first contribution in [#7282](https://github.com/pydantic/pydantic/pull/7282)
* [@FacerAin](https://github.com/FacerAin) made their first contribution in [#7288](https://github.com/pydantic/pydantic/pull/7288)
* [@acdha](https://github.com/acdha) made their first contribution in [#7297](https://github.com/pydantic/pydantic/pull/7297)
* [@andree0](https://github.com/andree0) made their first contribution in [#7319](https://github.com/pydantic/pydantic/pull/7319)
* [@gordonhart](https://github.com/gordonhart) made their first contribution in [#7375](https://github.com/pydantic/pydantic/pull/7375)
* [@pmmmwh](https://github.com/pmmmwh) made their first contribution in [#7496](https://github.com/pydantic/pydantic/pull/7496)
* [@disrupted](https://github.com/disrupted) made their first contribution in [#7299](https://github.com/pydantic/pydantic/pull/7299)
* [@prodigysml](https://github.com/prodigysml) made their first contribution in [#7360](https://github.com/pydantic/pydantic/pull/7360)

## v2.3.0 (2023-08-23)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.3.0)

* 🔥 Remove orphaned changes file from repo by [@lig](https://github.com/lig) in [#7168](https://github.com/pydantic/pydantic/pull/7168)
* Add copy button on documentation by [@Kludex](https://github.com/Kludex) in [#7190](https://github.com/pydantic/pydantic/pull/7190)
* Fix docs on JSON type by [@Kludex](https://github.com/Kludex) in [#7189](https://github.com/pydantic/pydantic/pull/7189)
* Update mypy 1.5.0 to 1.5.1 in CI by [@hramezani](https://github.com/hramezani) in [#7191](https://github.com/pydantic/pydantic/pull/7191)
* fix download links badge by [@samuelcolvin](https://github.com/samuelcolvin) in [#7200](https://github.com/pydantic/pydantic/pull/7200)
* add 2.2.1 to changelog by [@samuelcolvin](https://github.com/samuelcolvin) in [#7212](https://github.com/pydantic/pydantic/pull/7212)
* Make ModelWrapValidator protocols generic by [@dmontagu](https://github.com/dmontagu) in [#7154](https://github.com/pydantic/pydantic/pull/7154)
* Correct `Field(..., exclude: bool)` docs by [@samuelcolvin](https://github.com/samuelcolvin) in [#7214](https://github.com/pydantic/pydantic/pull/7214)
* Make shadowing attributes a warning instead of an error by [@adriangb](https://github.com/adriangb) in [#7193](https://github.com/pydantic/pydantic/pull/7193)
* Document `Base64Str` and `Base64Bytes` by [@Kludex](https://github.com/Kludex) in [#7192](https://github.com/pydantic/pydantic/pull/7192)
* Fix `config.defer_build` for serialization first cases by [@samuelcolvin](https://github.com/samuelcolvin) in [#7024](https://github.com/pydantic/pydantic/pull/7024)
* clean Model docstrings in JSON Schema by [@samuelcolvin](https://github.com/samuelcolvin) in [#7210](https://github.com/pydantic/pydantic/pull/7210)
* fix [#7228](https://github.com/pydantic/pydantic/pull/7228) (typo): docs in `validators.md` to correct `validate_default` kwarg by [@lmmx](https://github.com/lmmx) in [#7229](https://github.com/pydantic/pydantic/pull/7229)
* ✅ Implement `tzinfo.fromutc` method for `TzInfo` in `pydantic-core` by [@lig](https://github.com/lig) in [#7019](https://github.com/pydantic/pydantic/pull/7019)
* Support `__get_validators__` by [@hramezani](https://github.com/hramezani) in [#7197](https://github.com/pydantic/pydantic/pull/7197)

## v2.2.1 (2023-08-18)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.2.1)

* Make `xfail`ing test for root model extra stop `xfail`ing by [@dmontagu](https://github.com/dmontagu) in [#6937](https://github.com/pydantic/pydantic/pull/6937)
* Optimize recursion detection by stopping on the second visit for the same object by [@mciucu](https://github.com/mciucu) in [#7160](https://github.com/pydantic/pydantic/pull/7160)
* fix link in docs by [@tlambert03](https://github.com/tlambert03) in [#7166](https://github.com/pydantic/pydantic/pull/7166)
* Replace MiMalloc w/ default allocator by [@adriangb](https://github.com/adriangb) in [pydantic/pydantic-core#900](https://github.com/pydantic/pydantic-core/pull/900)
* Bump pydantic-core to 2.6.1 and prepare 2.2.1 release by [@adriangb](https://github.com/adriangb) in [#7176](https://github.com/pydantic/pydantic/pull/7176)

## v2.2.0 (2023-08-17)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.2.0)

* Split "pipx install" setup command into two commands on the documentation site by [@nomadmtb](https://github.com/nomadmtb) in [#6869](https://github.com/pydantic/pydantic/pull/6869)
* Deprecate `Field.include` by [@hramezani](https://github.com/hramezani) in [#6852](https://github.com/pydantic/pydantic/pull/6852)
* Fix typo in default factory error msg by [@hramezani](https://github.com/hramezani) in [#6880](https://github.com/pydantic/pydantic/pull/6880)
* Simplify handling of typing.Annotated in GenerateSchema by [@dmontagu](https://github.com/dmontagu) in [#6887](https://github.com/pydantic/pydantic/pull/6887)
* Re-enable fastapi tests in CI by [@dmontagu](https://github.com/dmontagu) in [#6883](https://github.com/pydantic/pydantic/pull/6883)
* Make it harder to hit collisions with json schema defrefs by [@dmontagu](https://github.com/dmontagu) in [#6566](https://github.com/pydantic/pydantic/pull/6566)
* Cleaner error for invalid input to `Path` fields by [@samuelcolvin](https://github.com/samuelcolvin) in [#6903](https://github.com/pydantic/pydantic/pull/6903)
* :memo: support Coordinate Type by [@yezz123](https://github.com/yezz123) in [#6906](https://github.com/pydantic/pydantic/pull/6906)
* Fix `ForwardRef` wrapper for py 3.10.0 (shim until bpo-45166) by [@randomir](https://github.com/randomir) in [#6919](https://github.com/pydantic/pydantic/pull/6919)
* Fix misbehavior related to copying of RootModel by [@dmontagu](https://github.com/dmontagu) in [#6918](https://github.com/pydantic/pydantic/pull/6918)
* Fix issue with recursion error caused by ParamSpec by [@dmontagu](https://github.com/dmontagu) in [#6923](https://github.com/pydantic/pydantic/pull/6923)
* Add section about Constrained classes to the Migration Guide by [@Kludex](https://github.com/Kludex) in [#6924](https://github.com/pydantic/pydantic/pull/6924)
* Use `main` branch for badge links by [@Viicos](https://github.com/Viicos) in [#6925](https://github.com/pydantic/pydantic/pull/6925)
* Add test for v1/v2 Annotated discrepancy by [@carlbordum](https://github.com/carlbordum) in [#6926](https://github.com/pydantic/pydantic/pull/6926)
* Make the v1 mypy plugin work with both v1 and v2 by [@dmontagu](https://github.com/dmontagu) in [#6921](https://github.com/pydantic/pydantic/pull/6921)
* Fix issue where generic models couldn't be parametrized with BaseModel by [@dmontagu](https://github.com/dmontagu) in [#6933](https://github.com/pydantic/pydantic/pull/6933)
* Remove xfail for discriminated union with alias by [@dmontagu](https://github.com/dmontagu) in [#6938](https://github.com/pydantic/pydantic/pull/6938)
* add field_serializer to computed_field by [@andresliszt](https://github.com/andresliszt) in [#6965](https://github.com/pydantic/pydantic/pull/6965)
* Use union_schema with Type[Union[...]] by [@JeanArhancet](https://github.com/JeanArhancet) in [#6952](https://github.com/pydantic/pydantic/pull/6952)
* Fix inherited typeddict attributes / config by [@adriangb](https://github.com/adriangb) in [#6981](https://github.com/pydantic/pydantic/pull/6981)
* fix dataclass annotated before validator called twice by [@davidhewitt](https://github.com/davidhewitt) in [#6998](https://github.com/pydantic/pydantic/pull/6998)
* Update test-fastapi deselected tests by [@hramezani](https://github.com/hramezani) in [#7014](https://github.com/pydantic/pydantic/pull/7014)
* Fix validator doc format by [@hramezani](https://github.com/hramezani) in [#7015](https://github.com/pydantic/pydantic/pull/7015)
* Fix typo in docstring of model_json_schema by [@AdamVinch-Federated](https://github.com/AdamVinch-Federated) in [#7032](https://github.com/pydantic/pydantic/pull/7032)
* remove unused "type ignores" with pyright by [@samuelcolvin](https://github.com/samuelcolvin) in [#7026](https://github.com/pydantic/pydantic/pull/7026)
* Add benchmark representing FastAPI startup time by [@adriangb](https://github.com/adriangb) in [#7030](https://github.com/pydantic/pydantic/pull/7030)
* Fix json_encoders for Enum subclasses by [@adriangb](https://github.com/adriangb) in [#7029](https://github.com/pydantic/pydantic/pull/7029)
* Update docstring of `ser_json_bytes` regarding base64 encoding by [@Viicos](https://github.com/Viicos) in [#7052](https://github.com/pydantic/pydantic/pull/7052)
* Allow `@validate_call` to work on async methods by [@adriangb](https://github.com/adriangb) in [#7046](https://github.com/pydantic/pydantic/pull/7046)
* Fix: mypy error with `Settings` and `SettingsConfigDict` by [@JeanArhancet](https://github.com/JeanArhancet) in [#7002](https://github.com/pydantic/pydantic/pull/7002)
* Fix some typos (repeated words and it's/its) by [@eumiro](https://github.com/eumiro) in [#7063](https://github.com/pydantic/pydantic/pull/7063)
* Fix the typo in docstring by [@harunyasar](https://github.com/harunyasar) in [#7062](https://github.com/pydantic/pydantic/pull/7062)
* Docs: Fix broken URL in the pydantic-settings package recommendation by [@swetjen](https://github.com/swetjen) in [#6995](https://github.com/pydantic/pydantic/pull/6995)
* Handle constraints being applied to schemas that don't accept it by [@adriangb](https://github.com/adriangb) in [#6951](https://github.com/pydantic/pydantic/pull/6951)
* Replace almost_equal_floats with math.isclose by [@eumiro](https://github.com/eumiro) in [#7082](https://github.com/pydantic/pydantic/pull/7082)
* bump pydantic-core to 2.5.0 by [@davidhewitt](https://github.com/davidhewitt) in [#7077](https://github.com/pydantic/pydantic/pull/7077)
* Add `short_version` and use it in links by [@hramezani](https://github.com/hramezani) in [#7115](https://github.com/pydantic/pydantic/pull/7115)
* 📝 Add usage link to `RootModel` by [@Kludex](https://github.com/Kludex) in [#7113](https://github.com/pydantic/pydantic/pull/7113)
* Revert "Fix default port for mongosrv DSNs (#6827)" by [@Kludex](https://github.com/Kludex) in [#7116](https://github.com/pydantic/pydantic/pull/7116)
* Clarify validate_default and _Unset handling in usage docs and migration guide by [@benbenbang](https://github.com/benbenbang) in [#6950](https://github.com/pydantic/pydantic/pull/6950)
* Tweak documentation of `Field.exclude` by [@Viicos](https://github.com/Viicos) in [#7086](https://github.com/pydantic/pydantic/pull/7086)
* Do not require `validate_assignment` to use `Field.frozen` by [@Viicos](https://github.com/Viicos) in [#7103](https://github.com/pydantic/pydantic/pull/7103)
* tweaks to `_core_utils` by [@samuelcolvin](https://github.com/samuelcolvin) in [#7040](https://github.com/pydantic/pydantic/pull/7040)
* Make DefaultDict working with set by [@hramezani](https://github.com/hramezani) in [#7126](https://github.com/pydantic/pydantic/pull/7126)
* Don't always require typing.Generic as a base for partially parametrized models by [@dmontagu](https://github.com/dmontagu) in [#7119](https://github.com/pydantic/pydantic/pull/7119)
* Fix issue with JSON schema incorrectly using parent class core schema by [@dmontagu](https://github.com/dmontagu) in [#7020](https://github.com/pydantic/pydantic/pull/7020)
* Fix xfailed test related to TypedDict and alias_generator by [@dmontagu](https://github.com/dmontagu) in [#6940](https://github.com/pydantic/pydantic/pull/6940)
* Improve error message for NameEmail by [@dmontagu](https://github.com/dmontagu) in [#6939](https://github.com/pydantic/pydantic/pull/6939)
* Fix generic computed fields by [@dmontagu](https://github.com/dmontagu) in [#6988](https://github.com/pydantic/pydantic/pull/6988)
* Reflect namedtuple default values during validation by [@dmontagu](https://github.com/dmontagu) in [#7144](https://github.com/pydantic/pydantic/pull/7144)
* Update dependencies, fix pydantic-core usage, fix CI issues by [@dmontagu](https://github.com/dmontagu) in [#7150](https://github.com/pydantic/pydantic/pull/7150)
* Add mypy 1.5.0 by [@hramezani](https://github.com/hramezani) in [#7118](https://github.com/pydantic/pydantic/pull/7118)
* Handle non-json native enum values by [@adriangb](https://github.com/adriangb) in [#7056](https://github.com/pydantic/pydantic/pull/7056)
* document `round_trip` in Json type documentation  by [@jc-louis](https://github.com/jc-louis) in [#7137](https://github.com/pydantic/pydantic/pull/7137)
* Relax signature checks to better support builtins and C extension functions as validators by [@adriangb](https://github.com/adriangb) in [#7101](https://github.com/pydantic/pydantic/pull/7101)
* add union_mode='left_to_right' by [@davidhewitt](https://github.com/davidhewitt) in [#7151](https://github.com/pydantic/pydantic/pull/7151)
* Include an error message hint for inherited ordering by [@yvalencia91](https://github.com/yvalencia91) in [#7124](https://github.com/pydantic/pydantic/pull/7124)
* Fix one docs link and resolve some warnings for two others by [@dmontagu](https://github.com/dmontagu) in [#7153](https://github.com/pydantic/pydantic/pull/7153)
* Include Field extra keys name in warning by [@hramezani](https://github.com/hramezani) in [#7136](https://github.com/pydantic/pydantic/pull/7136)

## v2.1.1 (2023-07-25)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.1.1)

* Skip FieldInfo merging when unnecessary by [@dmontagu](https://github.com/dmontagu) in [#6862](https://github.com/pydantic/pydantic/pull/6862)

## v2.1.0 (2023-07-25)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.1.0)

* Add `StringConstraints` for use as Annotated metadata by [@adriangb](https://github.com/adriangb) in [#6605](https://github.com/pydantic/pydantic/pull/6605)
* Try to fix intermittently failing CI by [@adriangb](https://github.com/adriangb) in [#6683](https://github.com/pydantic/pydantic/pull/6683)
* Remove redundant example of optional vs default. by [@ehiggs-deliverect](https://github.com/ehiggs-deliverect) in [#6676](https://github.com/pydantic/pydantic/pull/6676)
* Docs update by [@samuelcolvin](https://github.com/samuelcolvin) in [#6692](https://github.com/pydantic/pydantic/pull/6692)
* Remove the Validate always section in validator docs by [@adriangb](https://github.com/adriangb) in [#6679](https://github.com/pydantic/pydantic/pull/6679)
* Fix recursion error in json schema generation by [@adriangb](https://github.com/adriangb) in [#6720](https://github.com/pydantic/pydantic/pull/6720)
* Fix incorrect subclass check for secretstr by [@AlexVndnblcke](https://github.com/AlexVndnblcke) in [#6730](https://github.com/pydantic/pydantic/pull/6730)
* update pdm / pdm lockfile to 2.8.0 by [@davidhewitt](https://github.com/davidhewitt) in [#6714](https://github.com/pydantic/pydantic/pull/6714)
* unpin pdm on more CI jobs by [@davidhewitt](https://github.com/davidhewitt) in [#6755](https://github.com/pydantic/pydantic/pull/6755)
* improve source locations for auxiliary packages in docs by [@davidhewitt](https://github.com/davidhewitt) in [#6749](https://github.com/pydantic/pydantic/pull/6749)
* Assume builtins don't accept an info argument by [@adriangb](https://github.com/adriangb) in [#6754](https://github.com/pydantic/pydantic/pull/6754)
* Fix bug where calling `help(BaseModelSubclass)` raises errors by [@hramezani](https://github.com/hramezani) in [#6758](https://github.com/pydantic/pydantic/pull/6758)
* Fix mypy plugin handling of `@model_validator(mode="after")` by [@ljodal](https://github.com/ljodal) in [#6753](https://github.com/pydantic/pydantic/pull/6753)
* update pydantic-core to 2.3.1 by [@davidhewitt](https://github.com/davidhewitt) in [#6756](https://github.com/pydantic/pydantic/pull/6756)
* Mypy plugin for settings by [@hramezani](https://github.com/hramezani) in [#6760](https://github.com/pydantic/pydantic/pull/6760)
* Use `contentSchema` keyword for JSON schema by [@dmontagu](https://github.com/dmontagu) in [#6715](https://github.com/pydantic/pydantic/pull/6715)
* fast-path checking finite decimals by [@davidhewitt](https://github.com/davidhewitt) in [#6769](https://github.com/pydantic/pydantic/pull/6769)
* Docs update by [@samuelcolvin](https://github.com/samuelcolvin) in [#6771](https://github.com/pydantic/pydantic/pull/6771)
* Improve json schema doc by [@hramezani](https://github.com/hramezani) in [#6772](https://github.com/pydantic/pydantic/pull/6772)
* Update validator docs by [@adriangb](https://github.com/adriangb) in [#6695](https://github.com/pydantic/pydantic/pull/6695)
* Fix typehint for wrap validator by [@dmontagu](https://github.com/dmontagu) in [#6788](https://github.com/pydantic/pydantic/pull/6788)
* 🐛 Fix validation warning for unions of Literal and other type by [@lig](https://github.com/lig) in [#6628](https://github.com/pydantic/pydantic/pull/6628)
* Update documentation for generics support in V2 by [@tpdorsey](https://github.com/tpdorsey) in [#6685](https://github.com/pydantic/pydantic/pull/6685)
* add pydantic-core build info to `version_info()` by [@samuelcolvin](https://github.com/samuelcolvin) in [#6785](https://github.com/pydantic/pydantic/pull/6785)
* Fix pydantic dataclasses that use slots with default values by [@dmontagu](https://github.com/dmontagu) in [#6796](https://github.com/pydantic/pydantic/pull/6796)
* Fix inheritance of hash function for frozen models by [@dmontagu](https://github.com/dmontagu) in [#6789](https://github.com/pydantic/pydantic/pull/6789)
* ✨ Add `SkipJsonSchema` annotation by [@Kludex](https://github.com/Kludex) in [#6653](https://github.com/pydantic/pydantic/pull/6653)
* Error if an invalid field name is used with Field by [@dmontagu](https://github.com/dmontagu) in [#6797](https://github.com/pydantic/pydantic/pull/6797)
* Add `GenericModel` to `MOVED_IN_V2` by [@adriangb](https://github.com/adriangb) in [#6776](https://github.com/pydantic/pydantic/pull/6776)
* Remove unused code from `docs/usage/types/custom.md` by [@hramezani](https://github.com/hramezani) in [#6803](https://github.com/pydantic/pydantic/pull/6803)
* Fix `float` -> `Decimal` coercion precision loss by [@adriangb](https://github.com/adriangb) in [#6810](https://github.com/pydantic/pydantic/pull/6810)
* remove email validation from the north star benchmark by [@davidhewitt](https://github.com/davidhewitt) in [#6816](https://github.com/pydantic/pydantic/pull/6816)
* Fix link to mypy by [@progsmile](https://github.com/progsmile) in [#6824](https://github.com/pydantic/pydantic/pull/6824)
* Improve initialization hooks example by [@hramezani](https://github.com/hramezani) in [#6822](https://github.com/pydantic/pydantic/pull/6822)
* Fix default port for mongosrv DSNs by [@dmontagu](https://github.com/dmontagu) in [#6827](https://github.com/pydantic/pydantic/pull/6827)
* Improve API documentation, in particular more links between usage and API docs by [@samuelcolvin](https://github.com/samuelcolvin) in [#6780](https://github.com/pydantic/pydantic/pull/6780)
* update pydantic-core to 2.4.0 by [@davidhewitt](https://github.com/davidhewitt) in [#6831](https://github.com/pydantic/pydantic/pull/6831)
* Fix `annotated_types.MaxLen` validator for custom sequence types by [@ImogenBits](https://github.com/ImogenBits) in [#6809](https://github.com/pydantic/pydantic/pull/6809)
* Update V1 by [@hramezani](https://github.com/hramezani) in [#6833](https://github.com/pydantic/pydantic/pull/6833)
* Make it so callable JSON schema extra works by [@dmontagu](https://github.com/dmontagu) in [#6798](https://github.com/pydantic/pydantic/pull/6798)
* Fix serialization issue with `InstanceOf` by [@dmontagu](https://github.com/dmontagu) in [#6829](https://github.com/pydantic/pydantic/pull/6829)
* Add back support for `json_encoders` by [@adriangb](https://github.com/adriangb) in [#6811](https://github.com/pydantic/pydantic/pull/6811)
* Update field annotations when building the schema by [@dmontagu](https://github.com/dmontagu) in [#6838](https://github.com/pydantic/pydantic/pull/6838)
* Use `WeakValueDictionary` to fix generic memory leak by [@dmontagu](https://github.com/dmontagu) in [#6681](https://github.com/pydantic/pydantic/pull/6681)
* Add `config.defer_build` to optionally make model building lazy by [@samuelcolvin](https://github.com/samuelcolvin) in [#6823](https://github.com/pydantic/pydantic/pull/6823)
* delegate `UUID` serialization to pydantic-core by [@davidhewitt](https://github.com/davidhewitt) in [#6850](https://github.com/pydantic/pydantic/pull/6850)
* Update `json_encoders` docs by [@adriangb](https://github.com/adriangb) in [#6848](https://github.com/pydantic/pydantic/pull/6848)
* Fix error message for `staticmethod`/`classmethod` order with validate_call by [@dmontagu](https://github.com/dmontagu) in [#6686](https://github.com/pydantic/pydantic/pull/6686)
* Improve documentation for `Config` by [@samuelcolvin](https://github.com/samuelcolvin) in [#6847](https://github.com/pydantic/pydantic/pull/6847)
* Update serialization doc to mention `Field.exclude` takes priority over call-time `include/exclude` by [@hramezani](https://github.com/hramezani) in [#6851](https://github.com/pydantic/pydantic/pull/6851)
* Allow customizing core schema generation by making `GenerateSchema` public by [@adriangb](https://github.com/adriangb) in [#6737](https://github.com/pydantic/pydantic/pull/6737)

## v2.0.3 (2023-07-05)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.0.3)

* Mention PyObject (v1) moving to ImportString (v2) in migration doc by [@slafs](https://github.com/slafs) in [#6456](https://github.com/pydantic/pydantic/pull/6456)
* Fix release-tweet CI by [@Kludex](https://github.com/Kludex) in [#6461](https://github.com/pydantic/pydantic/pull/6461)
* Revise the section on required / optional / nullable fields. by [@ybressler](https://github.com/ybressler) in [#6468](https://github.com/pydantic/pydantic/pull/6468)
* Warn if a type hint is not in fact a type by [@adriangb](https://github.com/adriangb) in [#6479](https://github.com/pydantic/pydantic/pull/6479)
* Replace TransformSchema with GetPydanticSchema by [@dmontagu](https://github.com/dmontagu) in [#6484](https://github.com/pydantic/pydantic/pull/6484)
* Fix the un-hashability of various annotation types, for use in caching generic containers by [@dmontagu](https://github.com/dmontagu) in [#6480](https://github.com/pydantic/pydantic/pull/6480)
* PYD-164: Rework custom types docs by [@adriangb](https://github.com/adriangb) in [#6490](https://github.com/pydantic/pydantic/pull/6490)
* Fix ci by [@adriangb](https://github.com/adriangb) in [#6507](https://github.com/pydantic/pydantic/pull/6507)
* Fix forward ref in generic by [@adriangb](https://github.com/adriangb) in [#6511](https://github.com/pydantic/pydantic/pull/6511)
* Fix generation of serialization JSON schemas for core_schema.ChainSchema by [@dmontagu](https://github.com/dmontagu) in [#6515](https://github.com/pydantic/pydantic/pull/6515)
* Document the change in `Field.alias` behavior in Pydantic V2 by [@hramezani](https://github.com/hramezani) in [#6508](https://github.com/pydantic/pydantic/pull/6508)
* Give better error message attempting to compute the json schema of a model with undefined fields by [@dmontagu](https://github.com/dmontagu) in [#6519](https://github.com/pydantic/pydantic/pull/6519)
* Document `alias_priority` by [@tpdorsey](https://github.com/tpdorsey) in [#6520](https://github.com/pydantic/pydantic/pull/6520)
* Add redirect for types documentation by [@tpdorsey](https://github.com/tpdorsey) in [#6513](https://github.com/pydantic/pydantic/pull/6513)
* Allow updating docs without release by [@samuelcolvin](https://github.com/samuelcolvin) in [#6551](https://github.com/pydantic/pydantic/pull/6551)
* Ensure docs tests always run in the right folder by [@dmontagu](https://github.com/dmontagu) in [#6487](https://github.com/pydantic/pydantic/pull/6487)
* Defer evaluation of return type hints for serializer functions by [@dmontagu](https://github.com/dmontagu) in [#6516](https://github.com/pydantic/pydantic/pull/6516)
* Disable E501 from Ruff and rely on just Black by [@adriangb](https://github.com/adriangb) in [#6552](https://github.com/pydantic/pydantic/pull/6552)
* Update JSON Schema documentation for V2 by [@tpdorsey](https://github.com/tpdorsey) in [#6492](https://github.com/pydantic/pydantic/pull/6492)
* Add documentation of cyclic reference handling by [@dmontagu](https://github.com/dmontagu) in [#6493](https://github.com/pydantic/pydantic/pull/6493)
* Remove the need for change files by [@samuelcolvin](https://github.com/samuelcolvin) in [#6556](https://github.com/pydantic/pydantic/pull/6556)
* add "north star" benchmark by [@davidhewitt](https://github.com/davidhewitt) in [#6547](https://github.com/pydantic/pydantic/pull/6547)
* Update Dataclasses docs by [@tpdorsey](https://github.com/tpdorsey) in [#6470](https://github.com/pydantic/pydantic/pull/6470)
* ♻️ Use different error message on v1 redirects by [@Kludex](https://github.com/Kludex) in [#6595](https://github.com/pydantic/pydantic/pull/6595)
* ⬆ Upgrade `pydantic-core` to v2.2.0 by [@lig](https://github.com/lig) in [#6589](https://github.com/pydantic/pydantic/pull/6589)
* Fix serialization for IPvAny by [@dmontagu](https://github.com/dmontagu) in [#6572](https://github.com/pydantic/pydantic/pull/6572)
* Improve CI by using PDM instead of pip to install typing-extensions by [@adriangb](https://github.com/adriangb) in [#6602](https://github.com/pydantic/pydantic/pull/6602)
* Add `enum` error type docs  by [@lig](https://github.com/lig) in [#6603](https://github.com/pydantic/pydantic/pull/6603)
* 🐛 Fix `max_length` for unicode strings by [@lig](https://github.com/lig) in [#6559](https://github.com/pydantic/pydantic/pull/6559)
* Add documentation for accessing features via `pydantic.v1` by [@tpdorsey](https://github.com/tpdorsey) in [#6604](https://github.com/pydantic/pydantic/pull/6604)
* Include extra when iterating over a model by [@adriangb](https://github.com/adriangb) in [#6562](https://github.com/pydantic/pydantic/pull/6562)
* Fix typing of model_validator by [@adriangb](https://github.com/adriangb) in [#6514](https://github.com/pydantic/pydantic/pull/6514)
* Touch up Decimal validator by [@adriangb](https://github.com/adriangb) in [#6327](https://github.com/pydantic/pydantic/pull/6327)
* Fix various docstrings using fixed pytest-examples by [@dmontagu](https://github.com/dmontagu) in [#6607](https://github.com/pydantic/pydantic/pull/6607)
* Handle function validators in a discriminated union by [@dmontagu](https://github.com/dmontagu) in [#6570](https://github.com/pydantic/pydantic/pull/6570)
* Review json_schema.md by [@tpdorsey](https://github.com/tpdorsey) in [#6608](https://github.com/pydantic/pydantic/pull/6608)
* Make validate_call work on basemodel methods by [@dmontagu](https://github.com/dmontagu) in [#6569](https://github.com/pydantic/pydantic/pull/6569)
* add test for big int json serde by [@davidhewitt](https://github.com/davidhewitt) in [#6614](https://github.com/pydantic/pydantic/pull/6614)
* Fix pydantic dataclass problem with dataclasses.field default_factory by [@hramezani](https://github.com/hramezani) in [#6616](https://github.com/pydantic/pydantic/pull/6616)
* Fixed mypy type inference for TypeAdapter by [@zakstucke](https://github.com/zakstucke) in [#6617](https://github.com/pydantic/pydantic/pull/6617)
* Make it work to use None as a generic parameter by [@dmontagu](https://github.com/dmontagu) in [#6609](https://github.com/pydantic/pydantic/pull/6609)
* Make it work to use `$ref` as an alias by [@dmontagu](https://github.com/dmontagu) in [#6568](https://github.com/pydantic/pydantic/pull/6568)
* add note to migration guide about changes to `AnyUrl` etc by [@davidhewitt](https://github.com/davidhewitt) in [#6618](https://github.com/pydantic/pydantic/pull/6618)
* 🐛 Support defining `json_schema_extra` on `RootModel` using `Field` by [@lig](https://github.com/lig) in [#6622](https://github.com/pydantic/pydantic/pull/6622)
* Update pre-commit to prevent commits to main branch on accident by [@dmontagu](https://github.com/dmontagu) in [#6636](https://github.com/pydantic/pydantic/pull/6636)
* Fix PDM CI for python 3.7 on MacOS/windows by [@dmontagu](https://github.com/dmontagu) in [#6627](https://github.com/pydantic/pydantic/pull/6627)
* Produce more accurate signatures for pydantic dataclasses by [@dmontagu](https://github.com/dmontagu) in [#6633](https://github.com/pydantic/pydantic/pull/6633)
* Updates to Url types for Pydantic V2 by [@tpdorsey](https://github.com/tpdorsey) in [#6638](https://github.com/pydantic/pydantic/pull/6638)
* Fix list markdown in `transform` docstring by [@StefanBRas](https://github.com/StefanBRas) in [#6649](https://github.com/pydantic/pydantic/pull/6649)
* simplify slots_dataclass construction to appease mypy by [@davidhewitt](https://github.com/davidhewitt) in [#6639](https://github.com/pydantic/pydantic/pull/6639)
* Update TypedDict schema generation docstring by [@adriangb](https://github.com/adriangb) in [#6651](https://github.com/pydantic/pydantic/pull/6651)
* Detect and lint-error for prints by [@dmontagu](https://github.com/dmontagu) in [#6655](https://github.com/pydantic/pydantic/pull/6655)
* Add xfailing test for pydantic-core PR 766 by [@dmontagu](https://github.com/dmontagu) in [#6641](https://github.com/pydantic/pydantic/pull/6641)
* Ignore unrecognized fields from dataclasses metadata by [@dmontagu](https://github.com/dmontagu) in [#6634](https://github.com/pydantic/pydantic/pull/6634)
* Make non-existent class getattr a mypy error by [@dmontagu](https://github.com/dmontagu) in [#6658](https://github.com/pydantic/pydantic/pull/6658)
* Update pydantic-core to 2.3.0 by [@hramezani](https://github.com/hramezani) in [#6648](https://github.com/pydantic/pydantic/pull/6648)
* Use OrderedDict from typing_extensions by [@dmontagu](https://github.com/dmontagu) in [#6664](https://github.com/pydantic/pydantic/pull/6664)
* Fix typehint for JSON schema extra callable by [@dmontagu](https://github.com/dmontagu) in [#6659](https://github.com/pydantic/pydantic/pull/6659)

## v2.0.2 (2023-07-05)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.0.2)

* Fix bug where round-trip pickling/unpickling a `RootModel` would change the value of `__dict__`, [#6457](https://github.com/pydantic/pydantic/pull/6457) by [@dmontagu](https://github.com/dmontagu)
* Allow single-item discriminated unions, [#6405](https://github.com/pydantic/pydantic/pull/6405) by [@dmontagu](https://github.com/dmontagu)
* Fix issue with union parsing of enums, [#6440](https://github.com/pydantic/pydantic/pull/6440) by [@dmontagu](https://github.com/dmontagu)
* Docs: Fixed `constr` documentation, renamed old `regex` to new `pattern`, [#6452](https://github.com/pydantic/pydantic/pull/6452) by [@miili](https://github.com/miili)
* Change `GenerateJsonSchema.generate_definitions` signature, [#6436](https://github.com/pydantic/pydantic/pull/6436) by [@dmontagu](https://github.com/dmontagu)

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0.2)

## v2.0.1 (2023-07-04)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.0.1)

First patch release of Pydantic V2

* Extra fields added via `setattr` (i.e. `m.some_extra_field = 'extra_value'`)
  are added to `.model_extra` if `model_config` `extra='allowed'`. Fixed [#6333](https://github.com/pydantic/pydantic/pull/6333), [#6365](https://github.com/pydantic/pydantic/pull/6365) by [@aaraney](https://github.com/aaraney)
* Automatically unpack JSON schema '$ref' for custom types, [#6343](https://github.com/pydantic/pydantic/pull/6343) by [@adriangb](https://github.com/adriangb)
* Fix tagged unions multiple processing in submodels, [#6340](https://github.com/pydantic/pydantic/pull/6340) by [@suharnikov](https://github.com/suharnikov)

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0.1)

## v2.0 (2023-06-30)

[GitHub release](https://github.com/pydantic/pydantic/releases/tag/v2.0)

Pydantic V2 is here! :tada:

See [this post](https://docs.pydantic.dev/2.0/blog/pydantic-v2-final/) for more details.

## v2.0b3 (2023-06-16)

Third beta pre-release of Pydantic V2

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0b3)

## v2.0b2 (2023-06-03)

Add `from_attributes` runtime flag to `TypeAdapter.validate_python` and `BaseModel.model_validate`.

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0b2)

## v2.0b1 (2023-06-01)

First beta pre-release of Pydantic V2

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0b1)

## v2.0a4 (2023-05-05)

Fourth pre-release of Pydantic V2

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0a4)

## v2.0a3 (2023-04-20)

Third pre-release of Pydantic V2

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0a3)

## v2.0a2 (2023-04-12)

Second pre-release of Pydantic V2

See the full changelog [here](https://github.com/pydantic/pydantic/releases/tag/v2.0a2)

## v2.0a1 (2023-04-03)

First pre-release of Pydantic V2!

See [this post](https://docs.pydantic.dev/blog/pydantic-v2-alpha/) for more details.

## v1.10.13 (2023-09-27)

* Fix: Add max length check to `pydantic.validate_email`, [#7673](https://github.com/pydantic/pydantic/issues/7673) by [@hramezani](https://github.com/hramezani)
* Docs: Fix pip commands to install v1, [#6930](https://github.com/pydantic/pydantic/issues/6930) by [@chbndrhnns](https://github.com/chbndrhnns)

## v1.10.12 (2023-07-24)

* Fixes the `maxlen` property being dropped on `deque` validation. Happened only if the deque item has been typed. Changes the `_validate_sequence_like` func, [#6581](https://github.com/pydantic/pydantic/pull/6581) by [@maciekglowka](https://github.com/maciekglowka)

## v1.10.11 (2023-07-04)

* Importing create_model in tools.py through relative path instead of absolute path - so that it doesn't import V2 code when copied over to V2 branch, [#6361](https://github.com/pydantic/pydantic/pull/6361) by [@SharathHuddar](https://github.com/SharathHuddar)

## v1.10.10 (2023-06-30)

* Add Pydantic `Json` field support to settings management, [#6250](https://github.com/pydantic/pydantic/pull/6250) by [@hramezani](https://github.com/hramezani)
* Fixed literal validator errors for unhashable values, [#6188](https://github.com/pydantic/pydantic/pull/6188) by [@markus1978](https://github.com/markus1978)
* Fixed bug with generics receiving forward refs, [#6130](https://github.com/pydantic/pydantic/pull/6130) by [@mark-todd](https://github.com/mark-todd)
* Update install method of FastAPI for internal tests in CI, [#6117](https://github.com/pydantic/pydantic/pull/6117) by [@Kludex](https://github.com/Kludex)

## v1.10.9 (2023-06-07)

* Fix trailing zeros not ignored in Decimal validation, [#5968](https://github.com/pydantic/pydantic/pull/5968) by [@hramezani](https://github.com/hramezani)
* Fix mypy plugin for v1.4.0, [#5928](https://github.com/pydantic/pydantic/pull/5928) by [@cdce8p](https://github.com/cdce8p)
* Add future and past date hypothesis strategies, [#5850](https://github.com/pydantic/pydantic/pull/5850) by [@bschoenmaeckers](https://github.com/bschoenmaeckers)
* Discourage usage of Cython 3 with Pydantic 1.x, [#5845](https://github.com/pydantic/pydantic/pull/5845) by [@lig](https://github.com/lig)

## v1.10.8 (2023-05-23)

* Fix a bug in `Literal` usage with `typing-extension==4.6.0`, [#5826](https://github.com/pydantic/pydantic/pull/5826) by [@hramezani](https://github.com/hramezani)
* This solves the (closed) issue [#3849](https://github.com/pydantic/pydantic/pull/3849) where aliased fields that use discriminated union fail to validate when the data contains the non-aliased field name, [#5736](https://github.com/pydantic/pydantic/pull/5736) by [@benwah](https://github.com/benwah)
* Update email-validator dependency to >=2.0.0post2, [#5627](https://github.com/pydantic/pydantic/pull/5627) by [@adriangb](https://github.com/adriangb)
* update `AnyClassMethod` for changes in [python/typeshed#9771](https://github.com/python/typeshed/issues/9771), [#5505](https://github.com/pydantic/pydantic/pull/5505) by [@ITProKyle](https://github.com/ITProKyle)

## v1.10.7 (2023-03-22)

* Fix creating schema from model using `ConstrainedStr` with `regex` as dict key, [#5223](https://github.com/pydantic/pydantic/pull/5223) by [@matejetz](https://github.com/matejetz)
* Address bug in mypy plugin caused by explicit_package_bases=True, [#5191](https://github.com/pydantic/pydantic/pull/5191) by [@dmontagu](https://github.com/dmontagu)
* Add implicit defaults in the mypy plugin for Field with no default argument, [#5190](https://github.com/pydantic/pydantic/pull/5190) by [@dmontagu](https://github.com/dmontagu)
* Fix schema generated for Enum values used as Literals in discriminated unions, [#5188](https://github.com/pydantic/pydantic/pull/5188) by [@javibookline](https://github.com/javibookline)
* Fix mypy failures caused by the pydantic mypy plugin when users define `from_orm` in their own classes, [#5187](https://github.com/pydantic/pydantic/pull/5187) by [@dmontagu](https://github.com/dmontagu)
* Fix `InitVar` usage with pydantic dataclasses, mypy version `1.1.1` and the custom mypy plugin, [#5162](https://github.com/pydantic/pydantic/pull/5162) by [@cdce8p](https://github.com/cdce8p)

## v1.10.6 (2023-03-08)

* Implement logic to support creating validators from non standard callables by using defaults to identify them and unwrapping `functools.partial` and `functools.partialmethod` when checking the signature, [#5126](https://github.com/pydantic/pydantic/pull/5126) by [@JensHeinrich](https://github.com/JensHeinrich)
* Fix mypy plugin for v1.1.1, and fix `dataclass_transform` decorator for pydantic dataclasses, [#5111](https://github.com/pydantic/pydantic/pull/5111) by [@cdce8p](https://github.com/cdce8p)
* Raise `ValidationError`, not `ConfigError`, when a discriminator value is unhashable, [#4773](https://github.com/pydantic/pydantic/pull/4773) by [@kurtmckee](https://github.com/kurtmckee)

## v1.10.5 (2023-02-15)

* Fix broken parametrized bases handling with `GenericModel`s with complex sets of models, [#5052](https://github.com/pydantic/pydantic/pull/5052) by [@MarkusSintonen](https://github.com/MarkusSintonen)
* Invalidate mypy cache if plugin config changes, [#5007](https://github.com/pydantic/pydantic/pull/5007) by [@cdce8p](https://github.com/cdce8p)
* Fix `RecursionError` when deep-copying dataclass types wrapped by pydantic, [#4949](https://github.com/pydantic/pydantic/pull/4949) by [@mbillingr](https://github.com/mbillingr)
* Fix `X | Y` union syntax breaking `GenericModel`, [#4146](https://github.com/pydantic/pydantic/pull/4146) by [@thenx](https://github.com/thenx)
* Switch coverage badge to show coverage for this branch/release, [#5060](https://github.com/pydantic/pydantic/pull/5060) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.10.4 (2022-12-30)

* Change dependency to `typing-extensions>=4.2.0`, [#4885](https://github.com/pydantic/pydantic/pull/4885) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.10.3 (2022-12-29)

**NOTE: v1.10.3 was ["yanked"](https://pypi.org/help/#yanked) from PyPI due to [#4885](https://github.com/pydantic/pydantic/pull/4885) which is fixed in v1.10.4**

* fix parsing of custom root models, [#4883](https://github.com/pydantic/pydantic/pull/4883) by [@gou177](https://github.com/gou177)
* fix: use dataclass proxy for frozen or empty dataclasses, [#4878](https://github.com/pydantic/pydantic/pull/4878) by [@PrettyWood](https://github.com/PrettyWood)
* Fix `schema` and `schema_json` on models where a model instance is a one of default values, [#4781](https://github.com/pydantic/pydantic/pull/4781) by [@Bobronium](https://github.com/Bobronium)
* Add Jina AI to sponsors on docs index page, [#4767](https://github.com/pydantic/pydantic/pull/4767) by [@samuelcolvin](https://github.com/samuelcolvin)
* fix: support assignment on `DataclassProxy`, [#4695](https://github.com/pydantic/pydantic/pull/4695) by [@PrettyWood](https://github.com/PrettyWood)
* Add `postgresql+psycopg` as allowed scheme for `PostgreDsn` to make it usable with SQLAlchemy 2, [#4689](https://github.com/pydantic/pydantic/pull/4689) by [@morian](https://github.com/morian)
* Allow dict schemas to have both `patternProperties` and `additionalProperties`, [#4641](https://github.com/pydantic/pydantic/pull/4641) by [@jparise](https://github.com/jparise)
* Fixes error passing None for optional lists with `unique_items`, [#4568](https://github.com/pydantic/pydantic/pull/4568) by [@mfulgo](https://github.com/mfulgo)
* Fix `GenericModel` with `Callable` param raising a `TypeError`, [#4551](https://github.com/pydantic/pydantic/pull/4551) by [@mfulgo](https://github.com/mfulgo)
* Fix field regex with `StrictStr` type annotation, [#4538](https://github.com/pydantic/pydantic/pull/4538) by [@sisp](https://github.com/sisp)
* Correct `dataclass_transform` keyword argument name from `field_descriptors` to `field_specifiers`, [#4500](https://github.com/pydantic/pydantic/pull/4500) by [@samuelcolvin](https://github.com/samuelcolvin)
* fix: avoid multiple calls of `__post_init__` when dataclasses are inherited, [#4487](https://github.com/pydantic/pydantic/pull/4487) by [@PrettyWood](https://github.com/PrettyWood)
* Reduce the size of binary wheels, [#2276](https://github.com/pydantic/pydantic/pull/2276) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.10.2 (2022-09-05)

* **Revert Change:** Revert percent encoding of URL parts which was originally added in [#4224](https://github.com/pydantic/pydantic/pull/4224), [#4470](https://github.com/pydantic/pydantic/pull/4470) by [@samuelcolvin](https://github.com/samuelcolvin)
* Prevent long (length > `4_300`) strings/bytes as input to int fields, see
  [python/cpython#95778](https://github.com/python/cpython/issues/95778) and
  [CVE-2020-10735](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10735), [#1477](https://github.com/pydantic/pydantic/pull/1477) by [@samuelcolvin](https://github.com/samuelcolvin)
* fix: dataclass wrapper was not always called, [#4477](https://github.com/pydantic/pydantic/pull/4477) by [@PrettyWood](https://github.com/PrettyWood)
* Use `tomllib` on Python 3.11 when parsing `mypy` configuration, [#4476](https://github.com/pydantic/pydantic/pull/4476) by [@hauntsaninja](https://github.com/hauntsaninja)
* Basic fix of `GenericModel` cache to detect order of arguments in `Union` models, [#4474](https://github.com/pydantic/pydantic/pull/4474) by [@sveinugu](https://github.com/sveinugu)
* Fix mypy plugin when using bare types like `list` and `dict` as `default_factory`, [#4457](https://github.com/pydantic/pydantic/pull/4457) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.10.1 (2022-08-31)

* Add `__hash__` method to `pydancic.color.Color` class, [#4454](https://github.com/pydantic/pydantic/pull/4454) by [@czaki](https://github.com/czaki)

## v1.10.0 (2022-08-30)

* Refactor the whole _pydantic_ `dataclass` decorator to really act like its standard lib equivalent.
  It hence keeps `__eq__`, `__hash__`, ... and makes comparison with its non-validated version possible.
  It also fixes usage of `frozen` dataclasses in fields and usage of `default_factory` in nested dataclasses.
  The support of `Config.extra` has been added.
  Finally, config customization directly via a `dict` is now possible, [#2557](https://github.com/pydantic/pydantic/pull/2557) by [@PrettyWood](https://github.com/PrettyWood)
  <br/><br/>
  **BREAKING CHANGES:**
  - The `compiled` boolean (whether _pydantic_ is compiled with cython) has been moved from `main.py` to `version.py`
  - Now that `Config.extra` is supported, `dataclass` ignores by default extra arguments (like `BaseModel`)
* Fix PEP487 `__set_name__` protocol in `BaseModel` for PrivateAttrs, [#4407](https://github.com/pydantic/pydantic/pull/4407) by [@tlambert03](https://github.com/tlambert03)
* Allow for custom parsing of environment variables via `parse_env_var` in `Config`, [#4406](https://github.com/pydantic/pydantic/pull/4406) by [@acmiyaguchi](https://github.com/acmiyaguchi)
* Rename `master` to `main`, [#4405](https://github.com/pydantic/pydantic/pull/4405) by [@hramezani](https://github.com/hramezani)
* Fix `StrictStr` does not raise `ValidationError` when `max_length` is present in `Field`, [#4388](https://github.com/pydantic/pydantic/pull/4388) by [@hramezani](https://github.com/hramezani)
* Make `SecretStr` and `SecretBytes` hashable, [#4387](https://github.com/pydantic/pydantic/pull/4387) by [@chbndrhnns](https://github.com/chbndrhnns)
* Fix `StrictBytes` does not raise `ValidationError` when `max_length` is present in `Field`, [#4380](https://github.com/pydantic/pydantic/pull/4380) by [@JeanArhancet](https://github.com/JeanArhancet)
* Add support for bare `type`, [#4375](https://github.com/pydantic/pydantic/pull/4375) by [@hramezani](https://github.com/hramezani)
* Support Python 3.11, including binaries for 3.11 in PyPI, [#4374](https://github.com/pydantic/pydantic/pull/4374) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add support for `re.Pattern`, [#4366](https://github.com/pydantic/pydantic/pull/4366) by [@hramezani](https://github.com/hramezani)
* Fix `__post_init_post_parse__` is incorrectly passed keyword arguments when no `__post_init__` is defined, [#4361](https://github.com/pydantic/pydantic/pull/4361) by [@hramezani](https://github.com/hramezani)
* Fix implicitly importing `ForwardRef` and `Callable` from `pydantic.typing` instead of `typing` and also expose `MappingIntStrAny`, [#4358](https://github.com/pydantic/pydantic/pull/4358) by [@aminalaee](https://github.com/aminalaee)
* remove `Any` types from the `dataclass` decorator so it can be used with the `disallow_any_expr` mypy option, [#4356](https://github.com/pydantic/pydantic/pull/4356) by [@DetachHead](https://github.com/DetachHead)
* moved repo to `pydantic/pydantic`, [#4348](https://github.com/pydantic/pydantic/pull/4348) by [@yezz123](https://github.com/yezz123)
* fix "extra fields not permitted" error when dataclass with `Extra.forbid` is validated multiple times, [#4343](https://github.com/pydantic/pydantic/pull/4343) by [@detachhead](https://github.com/detachhead)
* Add Python 3.9 and 3.10 examples to docs, [#4339](https://github.com/pydantic/pydantic/pull/4339) by [@Bobronium](https://github.com/Bobronium)
* Discriminated union models now use `oneOf` instead of `anyOf` when generating OpenAPI schema definitions, [#4335](https://github.com/pydantic/pydantic/pull/4335) by [@MaxwellPayne](https://github.com/MaxwellPayne)
* Allow type checkers to infer inner type of `Json` type. `Json[list[str]]` will be now inferred as `list[str]`,
  `Json[Any]` should be used instead of plain `Json`.
  Runtime behaviour is not changed, [#4332](https://github.com/pydantic/pydantic/pull/4332) by [@Bobronium](https://github.com/Bobronium)
* Allow empty string aliases by using a `alias is not None` check, rather than `bool(alias)`, [#4253](https://github.com/pydantic/pydantic/pull/4253) by [@sergeytsaplin](https://github.com/sergeytsaplin)
* Update `ForwardRef`s in `Field.outer_type_`, [#4249](https://github.com/pydantic/pydantic/pull/4249) by [@JacobHayes](https://github.com/JacobHayes)
* The use of `__dataclass_transform__` has been replaced by `typing_extensions.dataclass_transform`, which is the preferred way to mark pydantic models as a dataclass under [PEP 681](https://peps.python.org/pep-0681/), [#4241](https://github.com/pydantic/pydantic/pull/4241) by [@multimeric](https://github.com/multimeric)
* Use parent model's `Config` when validating nested `NamedTuple` fields, [#4219](https://github.com/pydantic/pydantic/pull/4219) by [@synek](https://github.com/synek)
* Update `BaseModel.construct` to work with aliased Fields, [#4192](https://github.com/pydantic/pydantic/pull/4192) by [@kylebamos](https://github.com/kylebamos)
* Catch certain raised errors in `smart_deepcopy` and revert to `deepcopy` if so, [#4184](https://github.com/pydantic/pydantic/pull/4184) by [@coneybeare](https://github.com/coneybeare)
* Add `Config.anystr_upper` and `to_upper` kwarg to constr and conbytes, [#4165](https://github.com/pydantic/pydantic/pull/4165) by [@satheler](https://github.com/satheler)
* Fix JSON schema for `set` and `frozenset` when they include default values, [#4155](https://github.com/pydantic/pydantic/pull/4155) by [@aminalaee](https://github.com/aminalaee)
* Teach the mypy plugin that methods decorated by `@validator` are classmethods, [#4102](https://github.com/pydantic/pydantic/pull/4102) by [@DMRobertson](https://github.com/DMRobertson)
* Improve mypy plugin's ability to detect required fields, [#4086](https://github.com/pydantic/pydantic/pull/4086) by [@richardxia](https://github.com/richardxia)
* Support fields of type `Type[]` in schema, [#4051](https://github.com/pydantic/pydantic/pull/4051) by [@aminalaee](https://github.com/aminalaee)
* Add `default` value in JSON Schema when `const=True`, [#4031](https://github.com/pydantic/pydantic/pull/4031) by [@aminalaee](https://github.com/aminalaee)
* Adds reserved word check to signature generation logic, [#4011](https://github.com/pydantic/pydantic/pull/4011) by [@strue36](https://github.com/strue36)
* Fix Json strategy failure for the complex nested field, [#4005](https://github.com/pydantic/pydantic/pull/4005) by [@sergiosim](https://github.com/sergiosim)
* Add JSON-compatible float constraint `allow_inf_nan`, [#3994](https://github.com/pydantic/pydantic/pull/3994) by [@tiangolo](https://github.com/tiangolo)
* Remove undefined behaviour when `env_prefix` had characters in common with `env_nested_delimiter`, [#3975](https://github.com/pydantic/pydantic/pull/3975) by [@arsenron](https://github.com/arsenron)
* Support generics model with `create_model`, [#3945](https://github.com/pydantic/pydantic/pull/3945) by [@hot123s](https://github.com/hot123s)
* allow submodels to overwrite extra field info, [#3934](https://github.com/pydantic/pydantic/pull/3934) by [@PrettyWood](https://github.com/PrettyWood)
* Document and test structural pattern matching ([PEP 636](https://peps.python.org/pep-0636/)) on `BaseModel`, [#3920](https://github.com/pydantic/pydantic/pull/3920) by [@irgolic](https://github.com/irgolic)
* Fix incorrect deserialization of python timedelta object to ISO 8601 for negative time deltas.
  Minus was serialized in incorrect place ("P-1DT23H59M59.888735S" instead of correct "-P1DT23H59M59.888735S"), [#3899](https://github.com/pydantic/pydantic/pull/3899) by [@07pepa](https://github.com/07pepa)
* Fix validation of discriminated union fields with an alias when passing a model instance, [#3846](https://github.com/pydantic/pydantic/pull/3846) by [@chornsby](https://github.com/chornsby)
* Add a CockroachDsn type to validate CockroachDB connection strings. The type
  supports the following schemes: `cockroachdb`, `cockroachdb+psycopg2` and `cockroachdb+asyncpg`, [#3839](https://github.com/pydantic/pydantic/pull/3839) by [@blubber](https://github.com/blubber)
* Fix MyPy plugin to not override pre-existing `__init__` method in models, [#3824](https://github.com/pydantic/pydantic/pull/3824) by [@patrick91](https://github.com/patrick91)
* Fix mypy version checking, [#3783](https://github.com/pydantic/pydantic/pull/3783) by [@KotlinIsland](https://github.com/KotlinIsland)
* support overwriting dunder attributes of `BaseModel` instances, [#3777](https://github.com/pydantic/pydantic/pull/3777) by [@PrettyWood](https://github.com/PrettyWood)
* Added `ConstrainedDate` and `condate`, [#3740](https://github.com/pydantic/pydantic/pull/3740) by [@hottwaj](https://github.com/hottwaj)
* Support `kw_only` in dataclasses, [#3670](https://github.com/pydantic/pydantic/pull/3670) by [@detachhead](https://github.com/detachhead)
* Add comparison method for `Color` class, [#3646](https://github.com/pydantic/pydantic/pull/3646) by [@aminalaee](https://github.com/aminalaee)
* Drop support for python3.6, associated cleanup, [#3605](https://github.com/pydantic/pydantic/pull/3605) by [@samuelcolvin](https://github.com/samuelcolvin)
* created new function `to_lower_camel()` for "non pascal case" camel case, [#3463](https://github.com/pydantic/pydantic/pull/3463) by [@schlerp](https://github.com/schlerp)
* Add checks to `default` and `default_factory` arguments in Mypy plugin, [#3430](https://github.com/pydantic/pydantic/pull/3430) by [@klaa97](https://github.com/klaa97)
* fix mangling of `inspect.signature` for `BaseModel`, [#3413](https://github.com/pydantic/pydantic/pull/3413) by [@fix-inspect-signature](https://github.com/fix-inspect-signature)
* Adds the `SecretField` abstract class so that all the current and future secret fields like `SecretStr` and `SecretBytes` will derive from it, [#3409](https://github.com/pydantic/pydantic/pull/3409) by [@expobrain](https://github.com/expobrain)
* Support multi hosts validation in `PostgresDsn`, [#3337](https://github.com/pydantic/pydantic/pull/3337) by [@rglsk](https://github.com/rglsk)
* Fix parsing of very small numeric timedelta values, [#3315](https://github.com/pydantic/pydantic/pull/3315) by [@samuelcolvin](https://github.com/samuelcolvin)
* Update `SecretsSettingsSource` to respect `config.case_sensitive`, [#3273](https://github.com/pydantic/pydantic/pull/3273) by [@JeanArhancet](https://github.com/JeanArhancet)
* Add MongoDB network data source name (DSN) schema, [#3229](https://github.com/pydantic/pydantic/pull/3229) by [@snosratiershad](https://github.com/snosratiershad)
* Add support for multiple dotenv files, [#3222](https://github.com/pydantic/pydantic/pull/3222) by [@rekyungmin](https://github.com/rekyungmin)
* Raise an explicit `ConfigError` when multiple fields are incorrectly set for a single validator, [#3215](https://github.com/pydantic/pydantic/pull/3215) by [@SunsetOrange](https://github.com/SunsetOrange)
* Allow ellipsis on `Field`s inside `Annotated` for `TypedDicts` required, [#3133](https://github.com/pydantic/pydantic/pull/3133) by [@ezegomez](https://github.com/ezegomez)
* Catch overflow errors in `int_validator`, [#3112](https://github.com/pydantic/pydantic/pull/3112) by [@ojii](https://github.com/ojii)
* Adds a `__rich_repr__` method to `Representation` class which enables pretty printing with [Rich](https://github.com/willmcgugan/rich), [#3099](https://github.com/pydantic/pydantic/pull/3099) by [@willmcgugan](https://github.com/willmcgugan)
* Add percent encoding in `AnyUrl` and descendent types, [#3061](https://github.com/pydantic/pydantic/pull/3061) by [@FaresAhmedb](https://github.com/FaresAhmedb)
* `validate_arguments` decorator now supports `alias`, [#3019](https://github.com/pydantic/pydantic/pull/3019) by [@MAD-py](https://github.com/MAD-py)
* Avoid `__dict__` and `__weakref__` attributes in `AnyUrl` and IP address fields, [#2890](https://github.com/pydantic/pydantic/pull/2890) by [@nuno-andre](https://github.com/nuno-andre)
* Add ability to use `Final` in a field type annotation, [#2766](https://github.com/pydantic/pydantic/pull/2766) by [@uriyyo](https://github.com/uriyyo)
* Update requirement to `typing_extensions>=4.1.0` to guarantee `dataclass_transform` is available, [#4424](https://github.com/pydantic/pydantic/pull/4424) by [@commonism](https://github.com/commonism)
* Add Explosion and AWS to main sponsors, [#4413](https://github.com/pydantic/pydantic/pull/4413) by [@samuelcolvin](https://github.com/samuelcolvin)
* Update documentation for `copy_on_model_validation` to reflect recent changes, [#4369](https://github.com/pydantic/pydantic/pull/4369) by [@samuelcolvin](https://github.com/samuelcolvin)
* Runtime warning if `__slots__` is passed to `create_model`, `__slots__` is then ignored, [#4432](https://github.com/pydantic/pydantic/pull/4432) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add type hints to `BaseSettings.Config` to avoid mypy errors, also correct mypy version compatibility notice in docs, [#4450](https://github.com/pydantic/pydantic/pull/4450) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.10.0b1 (2022-08-24)

Pre-release, see [the GitHub release](https://github.com/pydantic/pydantic/releases/tag/v1.10.0b1) for details.

## v1.10.0a2 (2022-08-24)

Pre-release, see [the GitHub release](https://github.com/pydantic/pydantic/releases/tag/v1.10.0a2) for details.

## v1.10.0a1 (2022-08-22)

Pre-release, see [the GitHub release](https://github.com/pydantic/pydantic/releases/tag/v1.10.0a1) for details.

## v1.9.2 (2022-08-11)

**Revert Breaking Change**: _v1.9.1_ introduced a breaking change where model fields were
deep copied by default, this release reverts the default behaviour to match _v1.9.0_ and before,
while also allow deep-copy behaviour via `copy_on_model_validation = 'deep'`. See [#4092](https://github.com/pydantic/pydantic/pull/4092) for more information.

* Allow for shallow copies of model fields, `Config.copy_on_model_validation` is now a str which must be
  `'none'`, `'deep'`, or `'shallow'` corresponding to not copying, deep copy & shallow copy; default `'shallow'`,
  [#4093](https://github.com/pydantic/pydantic/pull/4093) by [@timkpaine](https://github.com/timkpaine)

## v1.9.1 (2022-05-19)

Thank you to pydantic's sponsors:
[@tiangolo](https://github.com/tiangolo), [@stellargraph](https://github.com/stellargraph), [@JonasKs](https://github.com/JonasKs), [@grillazz](https://github.com/grillazz), [@Mazyod](https://github.com/Mazyod), [@kevinalh](https://github.com/kevinalh), [@chdsbd](https://github.com/chdsbd), [@povilasb](https://github.com/povilasb), [@povilasb](https://github.com/povilasb), [@jina-ai](https://github.com/jina-ai),
[@mainframeindustries](https://github.com/mainframeindustries), [@robusta-dev](https://github.com/robusta-dev), [@SendCloud](https://github.com/SendCloud), [@rszamszur](https://github.com/rszamszur), [@jodal](https://github.com/jodal), [@hardbyte](https://github.com/hardbyte), [@corleyma](https://github.com/corleyma), [@daddycocoaman](https://github.com/daddycocoaman),
[@Rehket](https://github.com/Rehket), [@jokull](https://github.com/jokull), [@reillysiemens](https://github.com/reillysiemens), [@westonsteimel](https://github.com/westonsteimel), [@primer-io](https://github.com/primer-io), [@koxudaxi](https://github.com/koxudaxi), [@browniebroke](https://github.com/browniebroke), [@stradivari96](https://github.com/stradivari96),
[@adriangb](https://github.com/adriangb), [@kamalgill](https://github.com/kamalgill), [@jqueguiner](https://github.com/jqueguiner), [@dev-zero](https://github.com/dev-zero), [@datarootsio](https://github.com/datarootsio), [@RedCarpetUp](https://github.com/RedCarpetUp)
for their kind support.

* Limit the size of `generics._generic_types_cache` and `generics._assigned_parameters`
  to avoid unlimited increase in memory usage, [#4083](https://github.com/pydantic/pydantic/pull/4083) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add Jupyverse and FPS as Jupyter projects using pydantic, [#4082](https://github.com/pydantic/pydantic/pull/4082) by [@davidbrochart](https://github.com/davidbrochart)
* Speedup `__isinstancecheck__` on pydantic models when the type is not a model, may also avoid memory "leaks", [#4081](https://github.com/pydantic/pydantic/pull/4081) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix in-place modification of `FieldInfo` that caused problems with PEP 593 type aliases, [#4067](https://github.com/pydantic/pydantic/pull/4067) by [@adriangb](https://github.com/adriangb)
* Add support for autocomplete in VS Code via `__dataclass_transform__` when using `pydantic.dataclasses.dataclass`, [#4006](https://github.com/pydantic/pydantic/pull/4006) by [@giuliano-oliveira](https://github.com/giuliano-oliveira)
* Remove benchmarks from codebase and docs, [#3973](https://github.com/pydantic/pydantic/pull/3973) by [@samuelcolvin](https://github.com/samuelcolvin)
* Typing checking with pyright in CI, improve docs on vscode/pylance/pyright, [#3972](https://github.com/pydantic/pydantic/pull/3972) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix nested Python dataclass schema regression, [#3819](https://github.com/pydantic/pydantic/pull/3819) by [@himbeles](https://github.com/himbeles)
* Update documentation about lazy evaluation of sources for Settings, [#3806](https://github.com/pydantic/pydantic/pull/3806) by [@garyd203](https://github.com/garyd203)
* Prevent subclasses of bytes being converted to bytes, [#3706](https://github.com/pydantic/pydantic/pull/3706) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fixed "error checking inheritance of" when using PEP585 and PEP604 type hints, [#3681](https://github.com/pydantic/pydantic/pull/3681) by [@aleksul](https://github.com/aleksul)
* Allow self referencing `ClassVar`s in models, [#3679](https://github.com/pydantic/pydantic/pull/3679) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking Change, see [#4106](https://github.com/pydantic/pydantic/pull/4106)**: Fix issue with self-referencing dataclass, [#3675](https://github.com/pydantic/pydantic/pull/3675) by [@uriyyo](https://github.com/uriyyo)
* Include non-standard port numbers in rendered URLs, [#3652](https://github.com/pydantic/pydantic/pull/3652) by [@dolfinus](https://github.com/dolfinus)
* `Config.copy_on_model_validation` does a deep copy and not a shallow one, [#3641](https://github.com/pydantic/pydantic/pull/3641) by [@PrettyWood](https://github.com/PrettyWood)
* fix: clarify that discriminated unions do not support singletons, [#3636](https://github.com/pydantic/pydantic/pull/3636) by [@tommilligan](https://github.com/tommilligan)
* Add `read_text(encoding='utf-8')` for `setup.py`, [#3625](https://github.com/pydantic/pydantic/pull/3625) by [@hswong3i](https://github.com/hswong3i)
* Fix JSON Schema generation for Discriminated Unions within lists, [#3608](https://github.com/pydantic/pydantic/pull/3608) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.9.0 (2021-12-31)

Thank you to pydantic's sponsors:
[@sthagen](https://github.com/sthagen), [@timdrijvers](https://github.com/timdrijvers), [@toinbis](https://github.com/toinbis), [@koxudaxi](https://github.com/koxudaxi), [@ginomempin](https://github.com/ginomempin), [@primer-io](https://github.com/primer-io), [@and-semakin](https://github.com/and-semakin), [@westonsteimel](https://github.com/westonsteimel), [@reillysiemens](https://github.com/reillysiemens),
[@es3n1n](https://github.com/es3n1n), [@jokull](https://github.com/jokull), [@JonasKs](https://github.com/JonasKs), [@Rehket](https://github.com/Rehket), [@corleyma](https://github.com/corleyma), [@daddycocoaman](https://github.com/daddycocoaman), [@hardbyte](https://github.com/hardbyte), [@datarootsio](https://github.com/datarootsio), [@jodal](https://github.com/jodal), [@aminalaee](https://github.com/aminalaee), [@rafsaf](https://github.com/rafsaf),
[@jqueguiner](https://github.com/jqueguiner), [@chdsbd](https://github.com/chdsbd), [@kevinalh](https://github.com/kevinalh), [@Mazyod](https://github.com/Mazyod), [@grillazz](https://github.com/grillazz), [@JonasKs](https://github.com/JonasKs), [@simw](https://github.com/simw), [@leynier](https://github.com/leynier), [@xfenix](https://github.com/xfenix)
for their kind support.

### Highlights

* add Python 3.10 support, [#2885](https://github.com/pydantic/pydantic/pull/2885) by [@PrettyWood](https://github.com/PrettyWood)
* [Discriminated unions](https://docs.pydantic.dev/usage/types/#discriminated-unions-aka-tagged-unions), [#619](https://github.com/pydantic/pydantic/pull/619) by [@PrettyWood](https://github.com/PrettyWood)
* [`Config.smart_union` for better union logic](https://docs.pydantic.dev/usage/model_config/#smart-union), [#2092](https://github.com/pydantic/pydantic/pull/2092) by [@PrettyWood](https://github.com/PrettyWood)
* Binaries for Macos M1 CPUs, [#3498](https://github.com/pydantic/pydantic/pull/3498) by [@samuelcolvin](https://github.com/samuelcolvin)
* Complex types can be set via [nested environment variables](https://docs.pydantic.dev/usage/settings/#parsing-environment-variable-values), e.g. `foo___bar`, [#3159](https://github.com/pydantic/pydantic/pull/3159) by [@Air-Mark](https://github.com/Air-Mark)
* add a dark mode to _pydantic_ documentation, [#2913](https://github.com/pydantic/pydantic/pull/2913) by [@gbdlin](https://github.com/gbdlin)
* Add support for autocomplete in VS Code via `__dataclass_transform__`, [#2721](https://github.com/pydantic/pydantic/pull/2721) by [@tiangolo](https://github.com/tiangolo)
* Add "exclude" as a field parameter so that it can be configured using model config, [#660](https://github.com/pydantic/pydantic/pull/660) by [@daviskirk](https://github.com/daviskirk)

### v1.9.0 (2021-12-31) Changes

* Apply `update_forward_refs` to `Config.json_encodes` prevent name clashes in types defined via strings, [#3583](https://github.com/pydantic/pydantic/pull/3583) by [@samuelcolvin](https://github.com/samuelcolvin)
* Extend pydantic's mypy plugin to support mypy versions `0.910`, `0.920`, `0.921` & `0.930`, [#3573](https://github.com/pydantic/pydantic/pull/3573) & [#3594](https://github.com/pydantic/pydantic/pull/3594) by [@PrettyWood](https://github.com/PrettyWood), [@christianbundy](https://github.com/christianbundy), [@samuelcolvin](https://github.com/samuelcolvin)

### v1.9.0a2 (2021-12-24) Changes

* support generic models with discriminated union, [#3551](https://github.com/pydantic/pydantic/pull/3551) by [@PrettyWood](https://github.com/PrettyWood)
* keep old behaviour of `json()` by default, [#3542](https://github.com/pydantic/pydantic/pull/3542) by [@PrettyWood](https://github.com/PrettyWood)
* Removed typing-only `__root__` attribute from `BaseModel`, [#3540](https://github.com/pydantic/pydantic/pull/3540) by [@layday](https://github.com/layday)
* Build Python 3.10 wheels, [#3539](https://github.com/pydantic/pydantic/pull/3539) by [@mbachry](https://github.com/mbachry)
* Fix display of `extra` fields with model `__repr__`, [#3234](https://github.com/pydantic/pydantic/pull/3234) by [@cocolman](https://github.com/cocolman)
* models copied via `Config.copy_on_model_validation` always have all fields, [#3201](https://github.com/pydantic/pydantic/pull/3201) by [@PrettyWood](https://github.com/PrettyWood)
* nested ORM from nested dictionaries, [#3182](https://github.com/pydantic/pydantic/pull/3182) by [@PrettyWood](https://github.com/PrettyWood)
* fix link to discriminated union section by [@PrettyWood](https://github.com/PrettyWood)

### v1.9.0a1 (2021-12-18) Changes

* Add support for `Decimal`-specific validation configurations in `Field()`, additionally to using `condecimal()`,
  to allow better support from editors and tooling, [#3507](https://github.com/pydantic/pydantic/pull/3507) by [@tiangolo](https://github.com/tiangolo)
* Add `arm64` binaries suitable for MacOS with an M1 CPU to PyPI, [#3498](https://github.com/pydantic/pydantic/pull/3498) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix issue where `None` was considered invalid when using a `Union` type containing `Any` or `object`, [#3444](https://github.com/pydantic/pydantic/pull/3444) by [@tharradine](https://github.com/tharradine)
* When generating field schema, pass optional `field` argument (of type
  `pydantic.fields.ModelField`) to `__modify_schema__()` if present, [#3434](https://github.com/pydantic/pydantic/pull/3434) by [@jasujm](https://github.com/jasujm)
* Fix issue when pydantic fail to parse `typing.ClassVar` string type annotation, [#3401](https://github.com/pydantic/pydantic/pull/3401) by [@uriyyo](https://github.com/uriyyo)
* Mention Python >= 3.9.2 as an alternative to `typing_extensions.TypedDict`, [#3374](https://github.com/pydantic/pydantic/pull/3374) by [@BvB93](https://github.com/BvB93)
* Changed the validator method name in the [Custom Errors example](https://docs.pydantic.dev/usage/models/#custom-errors)
  to more accurately describe what the validator is doing; changed from `name_must_contain_space` to ` value_must_equal_bar`, [#3327](https://github.com/pydantic/pydantic/pull/3327) by [@michaelrios28](https://github.com/michaelrios28)
* Add `AmqpDsn` class, [#3254](https://github.com/pydantic/pydantic/pull/3254) by [@kludex](https://github.com/kludex)
* Always use `Enum` value as default in generated JSON schema, [#3190](https://github.com/pydantic/pydantic/pull/3190) by [@joaommartins](https://github.com/joaommartins)
* Add support for Mypy 0.920, [#3175](https://github.com/pydantic/pydantic/pull/3175) by [@christianbundy](https://github.com/christianbundy)
* `validate_arguments` now supports `extra` customization (used to always be `Extra.forbid`), [#3161](https://github.com/pydantic/pydantic/pull/3161) by [@PrettyWood](https://github.com/PrettyWood)
* Complex types can be set by nested environment variables, [#3159](https://github.com/pydantic/pydantic/pull/3159) by [@Air-Mark](https://github.com/Air-Mark)
* Fix mypy plugin to collect fields based on `pydantic.utils.is_valid_field` so that it ignores untyped private variables, [#3146](https://github.com/pydantic/pydantic/pull/3146) by [@hi-ogawa](https://github.com/hi-ogawa)
* fix `validate_arguments` issue with `Config.validate_all`, [#3135](https://github.com/pydantic/pydantic/pull/3135) by [@PrettyWood](https://github.com/PrettyWood)
* avoid dict coercion when using dict subclasses as field type, [#3122](https://github.com/pydantic/pydantic/pull/3122) by [@PrettyWood](https://github.com/PrettyWood)
* add support for `object` type, [#3062](https://github.com/pydantic/pydantic/pull/3062) by [@PrettyWood](https://github.com/PrettyWood)
* Updates pydantic dataclasses to keep `_special` properties on parent classes, [#3043](https://github.com/pydantic/pydantic/pull/3043) by [@zulrang](https://github.com/zulrang)
* Add a `TypedDict` class for error objects, [#3038](https://github.com/pydantic/pydantic/pull/3038) by [@matthewhughes934](https://github.com/matthewhughes934)
* Fix support for using a subclass of an annotation as a default, [#3018](https://github.com/pydantic/pydantic/pull/3018) by [@JacobHayes](https://github.com/JacobHayes)
* make `create_model_from_typeddict` mypy compliant, [#3008](https://github.com/pydantic/pydantic/pull/3008) by [@PrettyWood](https://github.com/PrettyWood)
* Make multiple inheritance work when using `PrivateAttr`, [#2989](https://github.com/pydantic/pydantic/pull/2989) by [@hmvp](https://github.com/hmvp)
* Parse environment variables as JSON, if they have a `Union` type with a complex subfield, [#2936](https://github.com/pydantic/pydantic/pull/2936) by [@cbartz](https://github.com/cbartz)
* Prevent `StrictStr` permitting `Enum` values where the enum inherits from `str`, [#2929](https://github.com/pydantic/pydantic/pull/2929) by [@samuelcolvin](https://github.com/samuelcolvin)
* Make `SecretsSettingsSource` parse values being assigned to fields of complex types when sourced from a secrets file,
  just as when sourced from environment variables, [#2917](https://github.com/pydantic/pydantic/pull/2917) by [@davidmreed](https://github.com/davidmreed)
* add a dark mode to _pydantic_ documentation, [#2913](https://github.com/pydantic/pydantic/pull/2913) by [@gbdlin](https://github.com/gbdlin)
* Make `pydantic-mypy` plugin compatible with `pyproject.toml` configuration, consistent with `mypy` changes.
  See the [doc](https://docs.pydantic.dev/mypy_plugin/#configuring-the-plugin) for more information, [#2908](https://github.com/pydantic/pydantic/pull/2908) by [@jrwalk](https://github.com/jrwalk)
* add Python 3.10 support, [#2885](https://github.com/pydantic/pydantic/pull/2885) by [@PrettyWood](https://github.com/PrettyWood)
* Correctly parse generic models with `Json[T]`, [#2860](https://github.com/pydantic/pydantic/pull/2860) by [@geekingfrog](https://github.com/geekingfrog)
* Update contrib docs re: Python version to use for building docs, [#2856](https://github.com/pydantic/pydantic/pull/2856) by [@paxcodes](https://github.com/paxcodes)
* Clarify documentation about _pydantic_'s support for custom validation and strict type checking,
  despite _pydantic_ being primarily a parsing library, [#2855](https://github.com/pydantic/pydantic/pull/2855) by [@paxcodes](https://github.com/paxcodes)
* Fix schema generation for `Deque` fields, [#2810](https://github.com/pydantic/pydantic/pull/2810) by [@sergejkozin](https://github.com/sergejkozin)
* fix an edge case when mixing constraints and `Literal`, [#2794](https://github.com/pydantic/pydantic/pull/2794) by [@PrettyWood](https://github.com/PrettyWood)
* Fix postponed annotation resolution for `NamedTuple` and `TypedDict` when they're used directly as the type of fields
  within Pydantic models, [#2760](https://github.com/pydantic/pydantic/pull/2760) by [@jameysharp](https://github.com/jameysharp)
* Fix bug when `mypy` plugin fails on `construct` method call for `BaseSettings` derived classes, [#2753](https://github.com/pydantic/pydantic/pull/2753) by [@uriyyo](https://github.com/uriyyo)
* Add function overloading for a `pydantic.create_model` function, [#2748](https://github.com/pydantic/pydantic/pull/2748) by [@uriyyo](https://github.com/uriyyo)
* Fix mypy plugin issue with self field declaration, [#2743](https://github.com/pydantic/pydantic/pull/2743) by [@uriyyo](https://github.com/uriyyo)
* The colon at the end of the line "The fields which were supplied when user was initialised:" suggests that the code following it is related.
  Changed it to a period, [#2733](https://github.com/pydantic/pydantic/pull/2733) by [@krisaoe](https://github.com/krisaoe)
* Renamed variable `schema` to `schema_` to avoid shadowing of global variable name, [#2724](https://github.com/pydantic/pydantic/pull/2724) by [@shahriyarr](https://github.com/shahriyarr)
* Add support for autocomplete in VS Code via `__dataclass_transform__`, [#2721](https://github.com/pydantic/pydantic/pull/2721) by [@tiangolo](https://github.com/tiangolo)
* add missing type annotations in `BaseConfig` and handle `max_length = 0`, [#2719](https://github.com/pydantic/pydantic/pull/2719) by [@PrettyWood](https://github.com/PrettyWood)
* Change `orm_mode` checking to allow recursive ORM mode parsing with dicts, [#2718](https://github.com/pydantic/pydantic/pull/2718) by [@nuno-andre](https://github.com/nuno-andre)
* Add episode 313 of the *Talk Python To Me* podcast, where Michael Kennedy and Samuel Colvin discuss Pydantic, to the docs, [#2712](https://github.com/pydantic/pydantic/pull/2712) by [@RatulMaharaj](https://github.com/RatulMaharaj)
* fix JSON schema generation when a field is of type `NamedTuple` and has a default value, [#2707](https://github.com/pydantic/pydantic/pull/2707) by [@PrettyWood](https://github.com/PrettyWood)
* `Enum` fields now properly support extra kwargs in schema generation, [#2697](https://github.com/pydantic/pydantic/pull/2697) by [@sammchardy](https://github.com/sammchardy)
* **Breaking Change, see [#3780](https://github.com/pydantic/pydantic/pull/3780)**: Make serialization of referenced pydantic models possible, [#2650](https://github.com/pydantic/pydantic/pull/2650) by [@PrettyWood](https://github.com/PrettyWood)
* Add `uniqueItems` option to `ConstrainedList`, [#2618](https://github.com/pydantic/pydantic/pull/2618) by [@nuno-andre](https://github.com/nuno-andre)
* Try to evaluate forward refs automatically at model creation, [#2588](https://github.com/pydantic/pydantic/pull/2588) by [@uriyyo](https://github.com/uriyyo)
* Switch docs preview and coverage display to use [smokeshow](https://smokeshow.helpmanual.io/), [#2580](https://github.com/pydantic/pydantic/pull/2580) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add `__version__` attribute to pydantic module, [#2572](https://github.com/pydantic/pydantic/pull/2572) by [@paxcodes](https://github.com/paxcodes)
* Add `postgresql+asyncpg`, `postgresql+pg8000`, `postgresql+psycopg2`, `postgresql+psycopg2cffi`, `postgresql+py-postgresql`
  and `postgresql+pygresql` schemes for `PostgresDsn`, [#2567](https://github.com/pydantic/pydantic/pull/2567) by [@postgres-asyncpg](https://github.com/postgres-asyncpg)
* Enable the Hypothesis plugin to generate a constrained decimal when the `decimal_places` argument is specified, [#2524](https://github.com/pydantic/pydantic/pull/2524) by [@cwe5590](https://github.com/cwe5590)
* Allow `collections.abc.Callable` to be used as type in Python 3.9, [#2519](https://github.com/pydantic/pydantic/pull/2519) by [@daviskirk](https://github.com/daviskirk)
* Documentation update how to custom compile pydantic when using pip install, small change in `setup.py`
  to allow for custom CFLAGS when compiling, [#2517](https://github.com/pydantic/pydantic/pull/2517) by [@peterroelants](https://github.com/peterroelants)
* remove side effect of `default_factory` to run it only once even if `Config.validate_all` is set, [#2515](https://github.com/pydantic/pydantic/pull/2515) by [@PrettyWood](https://github.com/PrettyWood)
* Add lookahead to ip regexes for `AnyUrl` hosts. This allows urls with DNS labels
  looking like IPs to validate as they are perfectly valid host names, [#2512](https://github.com/pydantic/pydantic/pull/2512) by [@sbv-csis](https://github.com/sbv-csis)
* Set `minItems` and `maxItems` in generated JSON schema for fixed-length tuples, [#2497](https://github.com/pydantic/pydantic/pull/2497) by [@PrettyWood](https://github.com/PrettyWood)
* Add `strict` argument to `conbytes`, [#2489](https://github.com/pydantic/pydantic/pull/2489) by [@koxudaxi](https://github.com/koxudaxi)
* Support user defined generic field types in generic models, [#2465](https://github.com/pydantic/pydantic/pull/2465) by [@daviskirk](https://github.com/daviskirk)
* Add an example and a short explanation of subclassing `GetterDict` to docs, [#2463](https://github.com/pydantic/pydantic/pull/2463) by [@nuno-andre](https://github.com/nuno-andre)
* add `KafkaDsn` type, `HttpUrl` now has default port 80 for http and 443 for https, [#2447](https://github.com/pydantic/pydantic/pull/2447) by [@MihanixA](https://github.com/MihanixA)
* Add `PastDate` and `FutureDate` types, [#2425](https://github.com/pydantic/pydantic/pull/2425) by [@Kludex](https://github.com/Kludex)
* Support generating schema for `Generic` fields with subtypes, [#2375](https://github.com/pydantic/pydantic/pull/2375) by [@maximberg](https://github.com/maximberg)
* fix(encoder): serialize `NameEmail` to str, [#2341](https://github.com/pydantic/pydantic/pull/2341) by [@alecgerona](https://github.com/alecgerona)
* add `Config.smart_union` to prevent coercion in `Union` if possible, see
 [the doc](https://docs.pydantic.dev/usage/model_config/#smart-union) for more information, [#2092](https://github.com/pydantic/pydantic/pull/2092) by [@PrettyWood](https://github.com/PrettyWood)
* Add ability to use `typing.Counter` as a model field type, [#2060](https://github.com/pydantic/pydantic/pull/2060) by [@uriyyo](https://github.com/uriyyo)
* Add parameterised subclasses to `__bases__` when constructing new parameterised classes, so that `A <: B => A[int] <: B[int]`, [#2007](https://github.com/pydantic/pydantic/pull/2007) by [@diabolo-dan](https://github.com/diabolo-dan)
* Create `FileUrl` type that allows URLs that conform to [RFC 8089](https://tools.ietf.org/html/rfc8089#section-2).
  Add `host_required` parameter, which is `True` by default (`AnyUrl` and subclasses), `False` in `RedisDsn`, `FileUrl`, [#1983](https://github.com/pydantic/pydantic/pull/1983) by [@vgerak](https://github.com/vgerak)
* add `confrozenset()`, analogous to `conset()` and `conlist()`, [#1897](https://github.com/pydantic/pydantic/pull/1897) by [@PrettyWood](https://github.com/PrettyWood)
* stop calling parent class `root_validator` if overridden, [#1895](https://github.com/pydantic/pydantic/pull/1895) by [@PrettyWood](https://github.com/PrettyWood)
* Add `repr` (defaults to `True`) parameter to `Field`, to hide it from the default representation of the `BaseModel`, [#1831](https://github.com/pydantic/pydantic/pull/1831) by [@fnep](https://github.com/fnep)
* Accept empty query/fragment URL parts, [#1807](https://github.com/pydantic/pydantic/pull/1807) by [@xavier](https://github.com/xavier)

## v1.8.2 (2021-05-11)

!!! warning
    A security vulnerability, level "moderate" is fixed in v1.8.2. Please upgrade **ASAP**.
    See security advisory [CVE-2021-29510](https://github.com/pydantic/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh)

* **Security fix:** Fix `date` and `datetime` parsing so passing either `'infinity'` or `float('inf')`
  (or their negative values) does not cause an infinite loop,
  see security advisory [CVE-2021-29510](https://github.com/pydantic/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh)
* fix schema generation with Enum by generating a valid name, [#2575](https://github.com/pydantic/pydantic/pull/2575) by [@PrettyWood](https://github.com/PrettyWood)
* fix JSON schema generation with a `Literal` of an enum member, [#2536](https://github.com/pydantic/pydantic/pull/2536) by [@PrettyWood](https://github.com/PrettyWood)
* Fix bug with configurations declarations that are passed as
  keyword arguments during class creation, [#2532](https://github.com/pydantic/pydantic/pull/2532) by [@uriyyo](https://github.com/uriyyo)
* Allow passing `json_encoders` in class kwargs, [#2521](https://github.com/pydantic/pydantic/pull/2521) by [@layday](https://github.com/layday)
* support arbitrary types with custom `__eq__`, [#2483](https://github.com/pydantic/pydantic/pull/2483) by [@PrettyWood](https://github.com/PrettyWood)
* support `Annotated` in `validate_arguments` and in generic models with Python 3.9, [#2483](https://github.com/pydantic/pydantic/pull/2483) by [@PrettyWood](https://github.com/PrettyWood)

## v1.8.1 (2021-03-03)

Bug fixes for regressions and new features from `v1.8`

* allow elements of `Config.field` to update elements of a `Field`, [#2461](https://github.com/pydantic/pydantic/pull/2461) by [@samuelcolvin](https://github.com/samuelcolvin)
* fix validation with a `BaseModel` field and a custom root type, [#2449](https://github.com/pydantic/pydantic/pull/2449) by [@PrettyWood](https://github.com/PrettyWood)
* expose `Pattern` encoder to `fastapi`, [#2444](https://github.com/pydantic/pydantic/pull/2444) by [@PrettyWood](https://github.com/PrettyWood)
* enable the Hypothesis plugin to generate a constrained float when the `multiple_of` argument is specified, [#2442](https://github.com/pydantic/pydantic/pull/2442) by [@tobi-lipede-oodle](https://github.com/tobi-lipede-oodle)
* Avoid `RecursionError` when using some types like `Enum` or `Literal` with generic models, [#2436](https://github.com/pydantic/pydantic/pull/2436) by [@PrettyWood](https://github.com/PrettyWood)
* do not overwrite declared `__hash__` in subclasses of a model, [#2422](https://github.com/pydantic/pydantic/pull/2422) by [@PrettyWood](https://github.com/PrettyWood)
* fix `mypy` complaints on `Path` and `UUID` related custom types, [#2418](https://github.com/pydantic/pydantic/pull/2418) by [@PrettyWood](https://github.com/PrettyWood)
* Support properly variable length tuples of compound types, [#2416](https://github.com/pydantic/pydantic/pull/2416) by [@PrettyWood](https://github.com/PrettyWood)

## v1.8 (2021-02-26)

Thank you to pydantic's sponsors:
[@jorgecarleitao](https://github.com/jorgecarleitao), [@BCarley](https://github.com/BCarley), [@chdsbd](https://github.com/chdsbd), [@tiangolo](https://github.com/tiangolo), [@matin](https://github.com/matin), [@linusg](https://github.com/linusg), [@kevinalh](https://github.com/kevinalh), [@koxudaxi](https://github.com/koxudaxi), [@timdrijvers](https://github.com/timdrijvers), [@mkeen](https://github.com/mkeen), [@meadsteve](https://github.com/meadsteve),
[@ginomempin](https://github.com/ginomempin), [@primer-io](https://github.com/primer-io), [@and-semakin](https://github.com/and-semakin), [@tomthorogood](https://github.com/tomthorogood), [@AjitZK](https://github.com/AjitZK), [@westonsteimel](https://github.com/westonsteimel), [@Mazyod](https://github.com/Mazyod), [@christippett](https://github.com/christippett), [@CarlosDomingues](https://github.com/CarlosDomingues),
[@Kludex](https://github.com/Kludex), [@r-m-n](https://github.com/r-m-n)
for their kind support.

### Highlights

* [Hypothesis plugin](https://docs.pydantic.dev/hypothesis_plugin/) for testing, [#2097](https://github.com/pydantic/pydantic/pull/2097) by [@Zac-HD](https://github.com/Zac-HD)
* support for [`NamedTuple` and `TypedDict`](https://docs.pydantic.dev/usage/types/#annotated-types), [#2216](https://github.com/pydantic/pydantic/pull/2216) by [@PrettyWood](https://github.com/PrettyWood)
* Support [`Annotated` hints on model fields](https://docs.pydantic.dev/usage/schema/#typingannotated-fields), [#2147](https://github.com/pydantic/pydantic/pull/2147) by [@JacobHayes](https://github.com/JacobHayes)
* [`frozen` parameter on `Config`](https://docs.pydantic.dev/usage/model_config/) to allow models to be hashed, [#1880](https://github.com/pydantic/pydantic/pull/1880) by [@rhuille](https://github.com/rhuille)

### Changes

* **Breaking Change**, remove old deprecation aliases from v1, [#2415](https://github.com/pydantic/pydantic/pull/2415) by [@samuelcolvin](https://github.com/samuelcolvin):
  * remove notes on migrating to v1 in docs
  * remove `Schema` which was replaced by `Field`
  * remove `Config.case_insensitive` which was replaced by `Config.case_sensitive` (default `False`)
  * remove `Config.allow_population_by_alias` which was replaced by `Config.allow_population_by_field_name`
  * remove `model.fields` which was replaced by `model.__fields__`
  * remove `model.to_string()` which was replaced by `str(model)`
  * remove `model.__values__` which was replaced by `model.__dict__`
* **Breaking Change:** always validate only first sublevel items with `each_item`.
  There were indeed some edge cases with some compound types where the validated items were the last sublevel ones, [#1933](https://github.com/pydantic/pydantic/pull/1933) by [@PrettyWood](https://github.com/PrettyWood)
* Update docs extensions to fix local syntax highlighting, [#2400](https://github.com/pydantic/pydantic/pull/2400) by [@daviskirk](https://github.com/daviskirk)
* fix: allow `utils.lenient_issubclass` to handle `typing.GenericAlias` objects like `list[str]` in Python >= 3.9, [#2399](https://github.com/pydantic/pydantic/pull/2399) by [@daviskirk](https://github.com/daviskirk)
* Improve field declaration for _pydantic_ `dataclass` by allowing the usage of _pydantic_ `Field` or `'metadata'` kwarg of `dataclasses.field`, [#2384](https://github.com/pydantic/pydantic/pull/2384) by [@PrettyWood](https://github.com/PrettyWood)
* Making `typing-extensions` a required dependency, [#2368](https://github.com/pydantic/pydantic/pull/2368) by [@samuelcolvin](https://github.com/samuelcolvin)
* Make `resolve_annotations` more lenient, allowing for missing modules, [#2363](https://github.com/pydantic/pydantic/pull/2363) by [@samuelcolvin](https://github.com/samuelcolvin)
* Allow configuring models through class kwargs, [#2356](https://github.com/pydantic/pydantic/pull/2356) by [@Bobronium](https://github.com/Bobronium)
* Prevent `Mapping` subclasses from always being coerced to `dict`, [#2325](https://github.com/pydantic/pydantic/pull/2325) by [@ofek](https://github.com/ofek)
* fix: allow `None` for type `Optional[conset / conlist]`, [#2320](https://github.com/pydantic/pydantic/pull/2320) by [@PrettyWood](https://github.com/PrettyWood)
* Support empty tuple type, [#2318](https://github.com/pydantic/pydantic/pull/2318) by [@PrettyWood](https://github.com/PrettyWood)
* fix: `python_requires` metadata to require >=3.6.1, [#2306](https://github.com/pydantic/pydantic/pull/2306) by [@hukkinj1](https://github.com/hukkinj1)
* Properly encode `Decimal` with, or without any decimal places, [#2293](https://github.com/pydantic/pydantic/pull/2293) by [@hultner](https://github.com/hultner)
* fix: update `__fields_set__` in `BaseModel.copy(update=…)`, [#2290](https://github.com/pydantic/pydantic/pull/2290) by [@PrettyWood](https://github.com/PrettyWood)
* fix: keep order of fields with `BaseModel.construct()`, [#2281](https://github.com/pydantic/pydantic/pull/2281) by [@PrettyWood](https://github.com/PrettyWood)
* Support generating schema for Generic fields, [#2262](https://github.com/pydantic/pydantic/pull/2262) by [@maximberg](https://github.com/maximberg)
* Fix `validate_decorator` so `**kwargs` doesn't exclude values when the keyword
  has the same name as the `*args` or `**kwargs` names, [#2251](https://github.com/pydantic/pydantic/pull/2251) by [@cybojenix](https://github.com/cybojenix)
* Prevent overriding positional arguments with keyword arguments in
  `validate_arguments`, as per behaviour with native functions, [#2249](https://github.com/pydantic/pydantic/pull/2249) by [@cybojenix](https://github.com/cybojenix)
* add documentation for `con*` type functions, [#2242](https://github.com/pydantic/pydantic/pull/2242) by [@tayoogunbiyi](https://github.com/tayoogunbiyi)
* Support custom root type (aka `__root__`) when using `parse_obj()` with nested models, [#2238](https://github.com/pydantic/pydantic/pull/2238) by [@PrettyWood](https://github.com/PrettyWood)
* Support custom root type (aka `__root__`) with `from_orm()`, [#2237](https://github.com/pydantic/pydantic/pull/2237) by [@PrettyWood](https://github.com/PrettyWood)
* ensure cythonized functions are left untouched when creating models, based on [#1944](https://github.com/pydantic/pydantic/pull/1944) by [@kollmats](https://github.com/kollmats), [#2228](https://github.com/pydantic/pydantic/pull/2228) by [@samuelcolvin](https://github.com/samuelcolvin)
* Resolve forward refs for stdlib dataclasses converted into _pydantic_ ones, [#2220](https://github.com/pydantic/pydantic/pull/2220) by [@PrettyWood](https://github.com/PrettyWood)
* Add support for `NamedTuple` and `TypedDict` types.
  Those two types are now handled and validated when used inside `BaseModel` or _pydantic_ `dataclass`.
  Two utils are also added `create_model_from_namedtuple` and `create_model_from_typeddict`, [#2216](https://github.com/pydantic/pydantic/pull/2216) by [@PrettyWood](https://github.com/PrettyWood)
* Do not ignore annotated fields when type is `Union[Type[...], ...]`, [#2213](https://github.com/pydantic/pydantic/pull/2213) by [@PrettyWood](https://github.com/PrettyWood)
* Raise a user-friendly `TypeError` when a `root_validator` does not return a `dict` (e.g. `None`), [#2209](https://github.com/pydantic/pydantic/pull/2209) by [@masalim2](https://github.com/masalim2)
* Add a `FrozenSet[str]` type annotation to the `allowed_schemes` argument on the `strict_url` field type, [#2198](https://github.com/pydantic/pydantic/pull/2198) by [@Midnighter](https://github.com/Midnighter)
* add `allow_mutation` constraint to `Field`, [#2195](https://github.com/pydantic/pydantic/pull/2195) by [@sblack-usu](https://github.com/sblack-usu)
* Allow `Field` with a `default_factory` to be used as an argument to a function
  decorated with `validate_arguments`, [#2176](https://github.com/pydantic/pydantic/pull/2176) by [@thomascobb](https://github.com/thomascobb)
* Allow non-existent secrets directory by only issuing a warning, [#2175](https://github.com/pydantic/pydantic/pull/2175) by [@davidolrik](https://github.com/davidolrik)
* fix URL regex to parse fragment without query string, [#2168](https://github.com/pydantic/pydantic/pull/2168) by [@andrewmwhite](https://github.com/andrewmwhite)
* fix: ensure to always return one of the values in `Literal` field type, [#2166](https://github.com/pydantic/pydantic/pull/2166) by [@PrettyWood](https://github.com/PrettyWood)
* Support `typing.Annotated` hints on model fields. A `Field` may now be set in the type hint with `Annotated[..., Field(...)`; all other annotations are ignored but still visible with `get_type_hints(..., include_extras=True)`, [#2147](https://github.com/pydantic/pydantic/pull/2147) by [@JacobHayes](https://github.com/JacobHayes)
* Added `StrictBytes` type as well as `strict=False` option to `ConstrainedBytes`, [#2136](https://github.com/pydantic/pydantic/pull/2136) by [@rlizzo](https://github.com/rlizzo)
* added `Config.anystr_lower` and `to_lower` kwarg to `constr` and `conbytes`, [#2134](https://github.com/pydantic/pydantic/pull/2134) by [@tayoogunbiyi](https://github.com/tayoogunbiyi)
* Support plain `typing.Tuple` type, [#2132](https://github.com/pydantic/pydantic/pull/2132) by [@PrettyWood](https://github.com/PrettyWood)
* Add a bound method `validate` to functions decorated with `validate_arguments`
  to validate parameters without actually calling the function, [#2127](https://github.com/pydantic/pydantic/pull/2127) by [@PrettyWood](https://github.com/PrettyWood)
* Add the ability to customize settings sources (add / disable / change priority order), [#2107](https://github.com/pydantic/pydantic/pull/2107) by [@kozlek](https://github.com/kozlek)
* Fix mypy complaints about most custom _pydantic_ types, [#2098](https://github.com/pydantic/pydantic/pull/2098) by [@PrettyWood](https://github.com/PrettyWood)
* Add a [Hypothesis](https://hypothesis.readthedocs.io/) plugin for easier [property-based testing](https://increment.com/testing/in-praise-of-property-based-testing/) with Pydantic's custom types - [usage details here](https://docs.pydantic.dev/hypothesis_plugin/), [#2097](https://github.com/pydantic/pydantic/pull/2097) by [@Zac-HD](https://github.com/Zac-HD)
* add validator for `None`, `NoneType` or `Literal[None]`, [#2095](https://github.com/pydantic/pydantic/pull/2095) by [@PrettyWood](https://github.com/PrettyWood)
* Handle properly fields of type `Callable` with a default value, [#2094](https://github.com/pydantic/pydantic/pull/2094) by [@PrettyWood](https://github.com/PrettyWood)
* Updated `create_model` return type annotation to return type which inherits from `__base__` argument, [#2071](https://github.com/pydantic/pydantic/pull/2071) by [@uriyyo](https://github.com/uriyyo)
* Add merged `json_encoders` inheritance, [#2064](https://github.com/pydantic/pydantic/pull/2064) by [@art049](https://github.com/art049)
* allow overwriting `ClassVar`s in sub-models without having to re-annotate them, [#2061](https://github.com/pydantic/pydantic/pull/2061) by [@layday](https://github.com/layday)
* add default encoder for `Pattern` type, [#2045](https://github.com/pydantic/pydantic/pull/2045) by [@PrettyWood](https://github.com/PrettyWood)
* Add `NonNegativeInt`, `NonPositiveInt`, `NonNegativeFloat`, `NonPositiveFloat`, [#1975](https://github.com/pydantic/pydantic/pull/1975) by [@mdavis-xyz](https://github.com/mdavis-xyz)
* Use % for percentage in string format of colors, [#1960](https://github.com/pydantic/pydantic/pull/1960) by [@EdwardBetts](https://github.com/EdwardBetts)
* Fixed issue causing `KeyError` to be raised when building schema from multiple `BaseModel` with the same names declared in separate classes, [#1912](https://github.com/pydantic/pydantic/pull/1912) by [@JSextonn](https://github.com/JSextonn)
* Add `rediss` (Redis over SSL) protocol to `RedisDsn`
  Allow URLs without `user` part (e.g., `rediss://:pass@localhost`), [#1911](https://github.com/pydantic/pydantic/pull/1911) by [@TrDex](https://github.com/TrDex)
* Add a new `frozen` boolean parameter to `Config` (default: `False`).
  Setting `frozen=True` does everything that `allow_mutation=False` does, and also generates a `__hash__()` method for the model. This makes instances of the model potentially hashable if all the attributes are hashable, [#1880](https://github.com/pydantic/pydantic/pull/1880) by [@rhuille](https://github.com/rhuille)
* fix schema generation with multiple Enums having the same name, [#1857](https://github.com/pydantic/pydantic/pull/1857) by [@PrettyWood](https://github.com/PrettyWood)
* Added support for 13/19 digits VISA credit cards in `PaymentCardNumber` type, [#1416](https://github.com/pydantic/pydantic/pull/1416) by [@AlexanderSov](https://github.com/AlexanderSov)
* fix: prevent `RecursionError` while using recursive `GenericModel`s, [#1370](https://github.com/pydantic/pydantic/pull/1370) by [@xppt](https://github.com/xppt)
* use `enum` for `typing.Literal` in JSON schema, [#1350](https://github.com/pydantic/pydantic/pull/1350) by [@PrettyWood](https://github.com/PrettyWood)
* Fix: some recursive models did not require `update_forward_refs` and silently behaved incorrectly, [#1201](https://github.com/pydantic/pydantic/pull/1201) by [@PrettyWood](https://github.com/PrettyWood)
* Fix bug where generic models with fields where the typevar is nested in another type `a: List[T]` are considered to be concrete. This allows these models to be subclassed and composed as expected, [#947](https://github.com/pydantic/pydantic/pull/947) by [@daviskirk](https://github.com/daviskirk)
* Add `Config.copy_on_model_validation` flag. When set to `False`, _pydantic_ will keep models used as fields
  untouched on validation instead of reconstructing (copying) them, [#265](https://github.com/pydantic/pydantic/pull/265) by [@PrettyWood](https://github.com/PrettyWood)

## v1.7.4 (2021-05-11)

* **Security fix:** Fix `date` and `datetime` parsing so passing either `'infinity'` or `float('inf')`
  (or their negative values) does not cause an infinite loop,
  See security advisory [CVE-2021-29510](https://github.com/pydantic/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh)

## v1.7.3 (2020-11-30)

Thank you to pydantic's sponsors:
[@timdrijvers](https://github.com/timdrijvers), [@BCarley](https://github.com/BCarley), [@chdsbd](https://github.com/chdsbd), [@tiangolo](https://github.com/tiangolo), [@matin](https://github.com/matin), [@linusg](https://github.com/linusg), [@kevinalh](https://github.com/kevinalh), [@jorgecarleitao](https://github.com/jorgecarleitao), [@koxudaxi](https://github.com/koxudaxi), [@primer-api](https://github.com/primer-api),
[@mkeen](https://github.com/mkeen), [@meadsteve](https://github.com/meadsteve) for their kind support.

* fix: set right default value for required (optional) fields, [#2142](https://github.com/pydantic/pydantic/pull/2142) by [@PrettyWood](https://github.com/PrettyWood)
* fix: support `underscore_attrs_are_private` with generic models, [#2138](https://github.com/pydantic/pydantic/pull/2138) by [@PrettyWood](https://github.com/PrettyWood)
* fix: update all modified field values in `root_validator` when `validate_assignment` is on, [#2116](https://github.com/pydantic/pydantic/pull/2116) by [@PrettyWood](https://github.com/PrettyWood)
* Allow pickling of `pydantic.dataclasses.dataclass` dynamically created from a built-in `dataclasses.dataclass`, [#2111](https://github.com/pydantic/pydantic/pull/2111) by [@aimestereo](https://github.com/aimestereo)
* Fix a regression where Enum fields would not propagate keyword arguments to the schema, [#2109](https://github.com/pydantic/pydantic/pull/2109) by [@bm424](https://github.com/bm424)
* Ignore `__doc__` as private attribute when `Config.underscore_attrs_are_private` is set, [#2090](https://github.com/pydantic/pydantic/pull/2090) by [@PrettyWood](https://github.com/PrettyWood)

## v1.7.2 (2020-11-01)

* fix slow `GenericModel` concrete model creation, allow `GenericModel` concrete name reusing in module, [#2078](https://github.com/pydantic/pydantic/pull/2078) by [@Bobronium](https://github.com/Bobronium)
* keep the order of the fields when `validate_assignment` is set, [#2073](https://github.com/pydantic/pydantic/pull/2073) by [@PrettyWood](https://github.com/PrettyWood)
* forward all the params of the stdlib `dataclass` when converted into _pydantic_ `dataclass`, [#2065](https://github.com/pydantic/pydantic/pull/2065) by [@PrettyWood](https://github.com/PrettyWood)

## v1.7.1 (2020-10-28)

Thank you to pydantic's sponsors:
[@timdrijvers](https://github.com/timdrijvers), [@BCarley](https://github.com/BCarley), [@chdsbd](https://github.com/chdsbd), [@tiangolo](https://github.com/tiangolo), [@matin](https://github.com/matin), [@linusg](https://github.com/linusg), [@kevinalh](https://github.com/kevinalh), [@jorgecarleitao](https://github.com/jorgecarleitao), [@koxudaxi](https://github.com/koxudaxi), [@primer-api](https://github.com/primer-api), [@mkeen](https://github.com/mkeen)
for their kind support.

* fix annotation of `validate_arguments` when passing configuration as argument, [#2055](https://github.com/pydantic/pydantic/pull/2055) by [@layday](https://github.com/layday)
* Fix mypy assignment error when using `PrivateAttr`, [#2048](https://github.com/pydantic/pydantic/pull/2048) by [@aphedges](https://github.com/aphedges)
* fix `underscore_attrs_are_private` causing `TypeError` when overriding `__init__`, [#2047](https://github.com/pydantic/pydantic/pull/2047) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fixed regression introduced in v1.7 involving exception handling in field validators when `validate_assignment=True`, [#2044](https://github.com/pydantic/pydantic/pull/2044) by [@johnsabath](https://github.com/johnsabath)
* fix: _pydantic_ `dataclass` can inherit from stdlib `dataclass`
  and `Config.arbitrary_types_allowed` is supported, [#2042](https://github.com/pydantic/pydantic/pull/2042) by [@PrettyWood](https://github.com/PrettyWood)

## v1.7 (2020-10-26)

Thank you to pydantic's sponsors:
[@timdrijvers](https://github.com/timdrijvers), [@BCarley](https://github.com/BCarley), [@chdsbd](https://github.com/chdsbd), [@tiangolo](https://github.com/tiangolo), [@matin](https://github.com/matin), [@linusg](https://github.com/linusg), [@kevinalh](https://github.com/kevinalh), [@jorgecarleitao](https://github.com/jorgecarleitao), [@koxudaxi](https://github.com/koxudaxi), [@primer-api](https://github.com/primer-api)
for their kind support.

### Highlights

* Python 3.9 support, thanks [@PrettyWood](https://github.com/PrettyWood)
* [Private model attributes](https://docs.pydantic.dev/usage/models/#private-model-attributes), thanks [@Bobronium](https://github.com/Bobronium)
* ["secrets files" support in `BaseSettings`](https://docs.pydantic.dev/usage/settings/#secret-support), thanks [@mdgilene](https://github.com/mdgilene)
* [convert stdlib dataclasses to pydantic dataclasses and use stdlib dataclasses in models](https://docs.pydantic.dev/usage/dataclasses/#stdlib-dataclasses-and-pydantic-dataclasses), thanks [@PrettyWood](https://github.com/PrettyWood)

### Changes

* **Breaking Change:** remove `__field_defaults__`, add `default_factory` support with `BaseModel.construct`.
  Use `.get_default()` method on fields in `__fields__` attribute instead, [#1732](https://github.com/pydantic/pydantic/pull/1732) by [@PrettyWood](https://github.com/PrettyWood)
* Rearrange CI to run linting as a separate job, split install recipes for different tasks, [#2020](https://github.com/pydantic/pydantic/pull/2020) by [@samuelcolvin](https://github.com/samuelcolvin)
* Allows subclasses of generic models to make some, or all, of the superclass's type parameters concrete, while
  also defining new type parameters in the subclass, [#2005](https://github.com/pydantic/pydantic/pull/2005) by [@choogeboom](https://github.com/choogeboom)
* Call validator with the correct `values` parameter type in `BaseModel.__setattr__`,
  when `validate_assignment = True` in model config, [#1999](https://github.com/pydantic/pydantic/pull/1999) by [@me-ransh](https://github.com/me-ransh)
* Force `fields.Undefined` to be a singleton object, fixing inherited generic model schemas, [#1981](https://github.com/pydantic/pydantic/pull/1981) by [@daviskirk](https://github.com/daviskirk)
* Include tests in source distributions, [#1976](https://github.com/pydantic/pydantic/pull/1976) by [@sbraz](https://github.com/sbraz)
* Add ability to use `min_length/max_length` constraints with secret types, [#1974](https://github.com/pydantic/pydantic/pull/1974) by [@uriyyo](https://github.com/uriyyo)
* Also check `root_validators` when `validate_assignment` is on, [#1971](https://github.com/pydantic/pydantic/pull/1971) by [@PrettyWood](https://github.com/PrettyWood)
* Fix const validators not running when custom validators are present, [#1957](https://github.com/pydantic/pydantic/pull/1957) by [@hmvp](https://github.com/hmvp)
* add `deque` to field types, [#1935](https://github.com/pydantic/pydantic/pull/1935) by [@wozniakty](https://github.com/wozniakty)
* add basic support for Python 3.9, [#1832](https://github.com/pydantic/pydantic/pull/1832) by [@PrettyWood](https://github.com/PrettyWood)
* Fix typo in the anchor of exporting_models.md#modelcopy and incorrect description, [#1821](https://github.com/pydantic/pydantic/pull/1821) by [@KimMachineGun](https://github.com/KimMachineGun)
* Added ability for `BaseSettings` to read "secret files", [#1820](https://github.com/pydantic/pydantic/pull/1820) by [@mdgilene](https://github.com/mdgilene)
* add `parse_raw_as` utility function, [#1812](https://github.com/pydantic/pydantic/pull/1812) by [@PrettyWood](https://github.com/PrettyWood)
* Support home directory relative paths for `dotenv` files (e.g. `~/.env`), [#1803](https://github.com/pydantic/pydantic/pull/1803) by [@PrettyWood](https://github.com/PrettyWood)
* Clarify documentation for `parse_file` to show that the argument
  should be a file *path* not a file-like object, [#1794](https://github.com/pydantic/pydantic/pull/1794) by [@mdavis-xyz](https://github.com/mdavis-xyz)
* Fix false positive from mypy plugin when a class nested within a `BaseModel` is named `Model`, [#1770](https://github.com/pydantic/pydantic/pull/1770) by [@selimb](https://github.com/selimb)
* add basic support of Pattern type in schema generation, [#1767](https://github.com/pydantic/pydantic/pull/1767) by [@PrettyWood](https://github.com/PrettyWood)
* Support custom title, description and default in schema of enums, [#1748](https://github.com/pydantic/pydantic/pull/1748) by [@PrettyWood](https://github.com/PrettyWood)
* Properly represent `Literal` Enums when `use_enum_values` is True, [#1747](https://github.com/pydantic/pydantic/pull/1747) by [@noelevans](https://github.com/noelevans)
* Allows timezone information to be added to strings to be formatted as time objects. Permitted formats are `Z` for UTC
  or an offset for absolute positive or negative time shifts. Or the timezone data can be omitted, [#1744](https://github.com/pydantic/pydantic/pull/1744) by [@noelevans](https://github.com/noelevans)
* Add stub `__init__` with Python 3.6 signature for `ForwardRef`, [#1738](https://github.com/pydantic/pydantic/pull/1738) by [@sirtelemak](https://github.com/sirtelemak)
* Fix behaviour with forward refs and optional fields in nested models, [#1736](https://github.com/pydantic/pydantic/pull/1736) by [@PrettyWood](https://github.com/PrettyWood)
* add `Enum` and `IntEnum` as valid types for fields, [#1735](https://github.com/pydantic/pydantic/pull/1735) by [@PrettyWood](https://github.com/PrettyWood)
* Change default value of `__module__` argument of `create_model` from `None` to `'pydantic.main'`.
  Set reference of created concrete model to it's module to allow pickling (not applied to models created in
  functions), [#1686](https://github.com/pydantic/pydantic/pull/1686) by [@Bobronium](https://github.com/Bobronium)
* Add private attributes support, [#1679](https://github.com/pydantic/pydantic/pull/1679) by [@Bobronium](https://github.com/Bobronium)
* add `config` to `@validate_arguments`, [#1663](https://github.com/pydantic/pydantic/pull/1663) by [@samuelcolvin](https://github.com/samuelcolvin)
* Allow descendant Settings models to override env variable names for the fields defined in parent Settings models with
  `env` in their `Config`. Previously only `env_prefix` configuration option was applicable, [#1561](https://github.com/pydantic/pydantic/pull/1561) by [@ojomio](https://github.com/ojomio)
* Support `ref_template` when creating schema `$ref`s, [#1479](https://github.com/pydantic/pydantic/pull/1479) by [@kilo59](https://github.com/kilo59)
* Add a `__call__` stub to `PyObject` so that mypy will know that it is callable, [#1352](https://github.com/pydantic/pydantic/pull/1352) by [@brianmaissy](https://github.com/brianmaissy)
* `pydantic.dataclasses.dataclass` decorator now supports built-in `dataclasses.dataclass`.
  It is hence possible to convert an existing `dataclass` easily to add Pydantic validation.
  Moreover nested dataclasses are also supported, [#744](https://github.com/pydantic/pydantic/pull/744) by [@PrettyWood](https://github.com/PrettyWood)

## v1.6.2 (2021-05-11)

* **Security fix:** Fix `date` and `datetime` parsing so passing either `'infinity'` or `float('inf')`
  (or their negative values) does not cause an infinite loop,
  See security advisory [CVE-2021-29510](https://github.com/pydantic/pydantic/security/advisories/GHSA-5jqp-qgf6-3pvh)

## v1.6.1 (2020-07-15)

* fix validation and parsing of nested models with `default_factory`, [#1710](https://github.com/pydantic/pydantic/pull/1710) by [@PrettyWood](https://github.com/PrettyWood)

## v1.6 (2020-07-11)

Thank you to pydantic's sponsors: [@matin](https://github.com/matin), [@tiangolo](https://github.com/tiangolo), [@chdsbd](https://github.com/chdsbd), [@jorgecarleitao](https://github.com/jorgecarleitao), and 1 anonymous sponsor for their kind support.

* Modify validators for `conlist` and `conset` to not have `always=True`, [#1682](https://github.com/pydantic/pydantic/pull/1682) by [@samuelcolvin](https://github.com/samuelcolvin)
* add port check to `AnyUrl` (can't exceed 65536) ports are 16 insigned bits: `0 <= port <= 2**16-1` src: [rfc793 header format](https://tools.ietf.org/html/rfc793#section-3.1), [#1654](https://github.com/pydantic/pydantic/pull/1654) by [@flapili](https://github.com/flapili)
* Document default `regex` anchoring semantics, [#1648](https://github.com/pydantic/pydantic/pull/1648) by [@yurikhan](https://github.com/yurikhan)
* Use `chain.from_iterable` in class_validators.py. This is a faster and more idiomatic way of using `itertools.chain`.
  Instead of computing all the items in the iterable and storing them in memory, they are computed one-by-one and never
  stored as a huge list. This can save on both runtime and memory space, [#1642](https://github.com/pydantic/pydantic/pull/1642) by [@cool-RR](https://github.com/cool-RR)
* Add `conset()`, analogous to `conlist()`, [#1623](https://github.com/pydantic/pydantic/pull/1623) by [@patrickkwang](https://github.com/patrickkwang)
* make Pydantic errors (un)pickable, [#1616](https://github.com/pydantic/pydantic/pull/1616) by [@PrettyWood](https://github.com/PrettyWood)
* Allow custom encoding for `dotenv` files, [#1615](https://github.com/pydantic/pydantic/pull/1615) by [@PrettyWood](https://github.com/PrettyWood)
* Ensure `SchemaExtraCallable` is always defined to get type hints on BaseConfig, [#1614](https://github.com/pydantic/pydantic/pull/1614) by [@PrettyWood](https://github.com/PrettyWood)
* Update datetime parser to support negative timestamps, [#1600](https://github.com/pydantic/pydantic/pull/1600) by [@mlbiche](https://github.com/mlbiche)
* Update mypy, remove `AnyType` alias for `Type[Any]`, [#1598](https://github.com/pydantic/pydantic/pull/1598) by [@samuelcolvin](https://github.com/samuelcolvin)
* Adjust handling of root validators so that errors are aggregated from _all_ failing root validators, instead of reporting on only the first root validator to fail, [#1586](https://github.com/pydantic/pydantic/pull/1586) by [@beezee](https://github.com/beezee)
* Make `__modify_schema__` on Enums apply to the enum schema rather than fields that use the enum, [#1581](https://github.com/pydantic/pydantic/pull/1581) by [@therefromhere](https://github.com/therefromhere)
* Fix behavior of `__all__` key when used in conjunction with index keys in advanced include/exclude of fields that are sequences, [#1579](https://github.com/pydantic/pydantic/pull/1579) by [@xspirus](https://github.com/xspirus)
* Subclass validators do not run when referencing a `List` field defined in a parent class when `each_item=True`. Added an example to the docs illustrating this, [#1566](https://github.com/pydantic/pydantic/pull/1566) by [@samueldeklund](https://github.com/samueldeklund)
* change `schema.field_class_to_schema` to support `frozenset` in schema, [#1557](https://github.com/pydantic/pydantic/pull/1557) by [@wangpeibao](https://github.com/wangpeibao)
* Call `__modify_schema__` only for the field schema, [#1552](https://github.com/pydantic/pydantic/pull/1552) by [@PrettyWood](https://github.com/PrettyWood)
* Move the assignment of `field.validate_always` in `fields.py` so the `always` parameter of validators work on inheritance, [#1545](https://github.com/pydantic/pydantic/pull/1545) by [@dcHHH](https://github.com/dcHHH)
* Added support for UUID instantiation through 16 byte strings such as `b'\x12\x34\x56\x78' * 4`. This was done to support `BINARY(16)` columns in sqlalchemy, [#1541](https://github.com/pydantic/pydantic/pull/1541) by [@shawnwall](https://github.com/shawnwall)
* Add a test assertion that `default_factory` can return a singleton, [#1523](https://github.com/pydantic/pydantic/pull/1523) by [@therefromhere](https://github.com/therefromhere)
* Add `NameEmail.__eq__` so duplicate `NameEmail` instances are evaluated as equal, [#1514](https://github.com/pydantic/pydantic/pull/1514) by [@stephen-bunn](https://github.com/stephen-bunn)
* Add datamodel-code-generator link in pydantic document site, [#1500](https://github.com/pydantic/pydantic/pull/1500) by [@koxudaxi](https://github.com/koxudaxi)
* Added a "Discussion of Pydantic" section to the documentation, with a link to "Pydantic Introduction" video by Alexander Hultnér, [#1499](https://github.com/pydantic/pydantic/pull/1499) by [@hultner](https://github.com/hultner)
* Avoid some side effects of `default_factory` by calling it only once
  if possible and by not setting a default value in the schema, [#1491](https://github.com/pydantic/pydantic/pull/1491) by [@PrettyWood](https://github.com/PrettyWood)
* Added docs about dumping dataclasses to JSON, [#1487](https://github.com/pydantic/pydantic/pull/1487) by [@mikegrima](https://github.com/mikegrima)
* Make `BaseModel.__signature__` class-only, so getting `__signature__` from model instance will raise `AttributeError`, [#1466](https://github.com/pydantic/pydantic/pull/1466) by [@Bobronium](https://github.com/Bobronium)
* include `'format': 'password'` in the schema for secret types, [#1424](https://github.com/pydantic/pydantic/pull/1424) by [@atheuz](https://github.com/atheuz)
* Modify schema constraints on `ConstrainedFloat` so that `exclusiveMinimum` and
  minimum are not included in the schema if they are equal to `-math.inf` and
  `exclusiveMaximum` and `maximum` are not included if they are equal to `math.inf`, [#1417](https://github.com/pydantic/pydantic/pull/1417) by [@vdwees](https://github.com/vdwees)
* Squash internal `__root__` dicts in `.dict()` (and, by extension, in `.json()`), [#1414](https://github.com/pydantic/pydantic/pull/1414) by [@patrickkwang](https://github.com/patrickkwang)
* Move `const` validator to post-validators so it validates the parsed value, [#1410](https://github.com/pydantic/pydantic/pull/1410) by [@selimb](https://github.com/selimb)
* Fix model validation to handle nested literals, e.g. `Literal['foo', Literal['bar']]`, [#1364](https://github.com/pydantic/pydantic/pull/1364) by [@DBCerigo](https://github.com/DBCerigo)
* Remove `user_required = True` from `RedisDsn`, neither user nor password are required, [#1275](https://github.com/pydantic/pydantic/pull/1275) by [@samuelcolvin](https://github.com/samuelcolvin)
* Remove extra `allOf` from schema for fields with `Union` and custom `Field`, [#1209](https://github.com/pydantic/pydantic/pull/1209) by [@mostaphaRoudsari](https://github.com/mostaphaRoudsari)
* Updates OpenAPI schema generation to output all enums as separate models.
  Instead of inlining the enum values in the model schema, models now use a `$ref`
  property to point to the enum definition, [#1173](https://github.com/pydantic/pydantic/pull/1173) by [@calvinwyoung](https://github.com/calvinwyoung)

## v1.5.1 (2020-04-23)

* Signature generation with `extra: allow` never uses a field name, [#1418](https://github.com/pydantic/pydantic/pull/1418) by [@prettywood](https://github.com/prettywood)
* Avoid mutating `Field` default value, [#1412](https://github.com/pydantic/pydantic/pull/1412) by [@prettywood](https://github.com/prettywood)

## v1.5 (2020-04-18)

* Make includes/excludes arguments for `.dict()`, `._iter()`, ..., immutable, [#1404](https://github.com/pydantic/pydantic/pull/1404) by [@AlexECX](https://github.com/AlexECX)
* Always use a field's real name with includes/excludes in `model._iter()`, regardless of `by_alias`, [#1397](https://github.com/pydantic/pydantic/pull/1397) by [@AlexECX](https://github.com/AlexECX)
* Update constr regex example to include start and end lines, [#1396](https://github.com/pydantic/pydantic/pull/1396) by [@lmcnearney](https://github.com/lmcnearney)
* Confirm that shallow `model.copy()` does make a shallow copy of attributes, [#1383](https://github.com/pydantic/pydantic/pull/1383) by [@samuelcolvin](https://github.com/samuelcolvin)
* Renaming `model_name` argument of `main.create_model()` to `__model_name` to allow using `model_name` as a field name, [#1367](https://github.com/pydantic/pydantic/pull/1367) by [@kittipatv](https://github.com/kittipatv)
* Replace raising of exception to silent passing  for non-Var attributes in mypy plugin, [#1345](https://github.com/pydantic/pydantic/pull/1345) by [@b0g3r](https://github.com/b0g3r)
* Remove `typing_extensions` dependency for Python 3.8, [#1342](https://github.com/pydantic/pydantic/pull/1342) by [@prettywood](https://github.com/prettywood)
* Make `SecretStr` and `SecretBytes` initialization idempotent, [#1330](https://github.com/pydantic/pydantic/pull/1330) by [@atheuz](https://github.com/atheuz)
* document making secret types dumpable using the json method, [#1328](https://github.com/pydantic/pydantic/pull/1328) by [@atheuz](https://github.com/atheuz)
* Move all testing and build to github actions, add windows and macos binaries,
  thank you [@StephenBrown2](https://github.com/StephenBrown2) for much help, [#1326](https://github.com/pydantic/pydantic/pull/1326) by [@samuelcolvin](https://github.com/samuelcolvin)
* fix card number length check in `PaymentCardNumber`, `PaymentCardBrand` now inherits from `str`, [#1317](https://github.com/pydantic/pydantic/pull/1317) by [@samuelcolvin](https://github.com/samuelcolvin)
* Have `BaseModel` inherit from `Representation` to make mypy happy when overriding `__str__`, [#1310](https://github.com/pydantic/pydantic/pull/1310) by [@FuegoFro](https://github.com/FuegoFro)
* Allow `None` as input to all optional list fields, [#1307](https://github.com/pydantic/pydantic/pull/1307) by [@prettywood](https://github.com/prettywood)
* Add `datetime` field to `default_factory` example, [#1301](https://github.com/pydantic/pydantic/pull/1301) by [@StephenBrown2](https://github.com/StephenBrown2)
* Allow subclasses of known types to be encoded with superclass encoder, [#1291](https://github.com/pydantic/pydantic/pull/1291) by [@StephenBrown2](https://github.com/StephenBrown2)
* Exclude exported fields from all elements of a list/tuple of submodels/dicts with `'__all__'`, [#1286](https://github.com/pydantic/pydantic/pull/1286) by [@masalim2](https://github.com/masalim2)
* Add pydantic.color.Color objects as available input for Color fields, [#1258](https://github.com/pydantic/pydantic/pull/1258) by [@leosussan](https://github.com/leosussan)
* In examples, type nullable fields as `Optional`, so that these are valid mypy annotations, [#1248](https://github.com/pydantic/pydantic/pull/1248) by [@kokes](https://github.com/kokes)
* Make `pattern_validator()` accept pre-compiled `Pattern` objects. Fix `str_validator()` return type to `str`, [#1237](https://github.com/pydantic/pydantic/pull/1237) by [@adamgreg](https://github.com/adamgreg)
* Document how to manage Generics and inheritance, [#1229](https://github.com/pydantic/pydantic/pull/1229) by [@esadruhn](https://github.com/esadruhn)
* `update_forward_refs()` method of BaseModel now copies `__dict__` of class module instead of modyfying it, [#1228](https://github.com/pydantic/pydantic/pull/1228) by [@paul-ilyin](https://github.com/paul-ilyin)
* Support instance methods and class methods with `@validate_arguments`, [#1222](https://github.com/pydantic/pydantic/pull/1222) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add `default_factory` argument to `Field` to create a dynamic default value by passing a zero-argument callable, [#1210](https://github.com/pydantic/pydantic/pull/1210) by [@prettywood](https://github.com/prettywood)
* add support for `NewType` of `List`, `Optional`, etc, [#1207](https://github.com/pydantic/pydantic/pull/1207) by [@Kazy](https://github.com/Kazy)
* fix mypy signature for `root_validator`, [#1192](https://github.com/pydantic/pydantic/pull/1192) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fixed parsing of nested 'custom root type' models, [#1190](https://github.com/pydantic/pydantic/pull/1190) by [@Shados](https://github.com/Shados)
* Add `validate_arguments` function decorator which checks the arguments to a function matches type annotations, [#1179](https://github.com/pydantic/pydantic/pull/1179) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add `__signature__` to models, [#1034](https://github.com/pydantic/pydantic/pull/1034) by [@Bobronium](https://github.com/Bobronium)
* Refactor `._iter()` method, 10x speed boost for `dict(model)`, [#1017](https://github.com/pydantic/pydantic/pull/1017) by [@Bobronium](https://github.com/Bobronium)

## v1.4 (2020-01-24)

* **Breaking Change:** alias precedence logic changed so aliases on a field always take priority over
  an alias from `alias_generator` to avoid buggy/unexpected behaviour,
  see [here](https://docs.pydantic.dev/usage/model_config/#alias-precedence) for details, [#1178](https://github.com/pydantic/pydantic/pull/1178) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add support for unicode and punycode in TLDs, [#1182](https://github.com/pydantic/pydantic/pull/1182) by [@jamescurtin](https://github.com/jamescurtin)
* Fix `cls` argument in validators during assignment, [#1172](https://github.com/pydantic/pydantic/pull/1172) by [@samuelcolvin](https://github.com/samuelcolvin)
* completing Luhn algorithm for `PaymentCardNumber`, [#1166](https://github.com/pydantic/pydantic/pull/1166) by [@cuencandres](https://github.com/cuencandres)
* add support for generics that implement `__get_validators__` like a custom data type, [#1159](https://github.com/pydantic/pydantic/pull/1159) by [@tiangolo](https://github.com/tiangolo)
* add support for infinite generators with `Iterable`, [#1152](https://github.com/pydantic/pydantic/pull/1152) by [@tiangolo](https://github.com/tiangolo)
* fix `url_regex` to accept schemas with `+`, `-` and `.` after the first character, [#1142](https://github.com/pydantic/pydantic/pull/1142) by [@samuelcolvin](https://github.com/samuelcolvin)
* move `version_info()` to `version.py`, suggest its use in issues, [#1138](https://github.com/pydantic/pydantic/pull/1138) by [@samuelcolvin](https://github.com/samuelcolvin)
* Improve pydantic import time by roughly 50% by deferring some module loading and regex compilation, [#1127](https://github.com/pydantic/pydantic/pull/1127) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix `EmailStr` and `NameEmail` to accept instances of themselves in cython, [#1126](https://github.com/pydantic/pydantic/pull/1126) by [@koxudaxi](https://github.com/koxudaxi)
* Pass model class to the `Config.schema_extra` callable, [#1125](https://github.com/pydantic/pydantic/pull/1125) by [@therefromhere](https://github.com/therefromhere)
* Fix regex for username and password in URLs, [#1115](https://github.com/pydantic/pydantic/pull/1115) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add support for nested generic models, [#1104](https://github.com/pydantic/pydantic/pull/1104) by [@dmontagu](https://github.com/dmontagu)
* add `__all__` to `__init__.py` to prevent "implicit reexport" errors from mypy, [#1072](https://github.com/pydantic/pydantic/pull/1072) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add support for using "dotenv" files with `BaseSettings`, [#1011](https://github.com/pydantic/pydantic/pull/1011) by [@acnebs](https://github.com/acnebs)

## v1.3 (2019-12-21)

* Change `schema` and `schema_model` to handle dataclasses by using their `__pydantic_model__` feature, [#792](https://github.com/pydantic/pydantic/pull/792) by [@aviramha](https://github.com/aviramha)
* Added option for `root_validator` to be skipped if values validation fails using keyword `skip_on_failure=True`, [#1049](https://github.com/pydantic/pydantic/pull/1049) by [@aviramha](https://github.com/aviramha)
* Allow `Config.schema_extra` to be a callable so that the generated schema can be post-processed, [#1054](https://github.com/pydantic/pydantic/pull/1054) by [@selimb](https://github.com/selimb)
* Update mypy to version 0.750, [#1057](https://github.com/pydantic/pydantic/pull/1057) by [@dmontagu](https://github.com/dmontagu)
* Trick Cython into allowing str subclassing, [#1061](https://github.com/pydantic/pydantic/pull/1061) by [@skewty](https://github.com/skewty)
* Prevent type attributes being added to schema unless the attribute `__schema_attributes__` is `True`, [#1064](https://github.com/pydantic/pydantic/pull/1064) by [@samuelcolvin](https://github.com/samuelcolvin)
* Change `BaseModel.parse_file` to use `Config.json_loads`, [#1067](https://github.com/pydantic/pydantic/pull/1067) by [@kierandarcy](https://github.com/kierandarcy)
* Fix for optional `Json` fields, [#1073](https://github.com/pydantic/pydantic/pull/1073) by [@volker48](https://github.com/volker48)
* Change the default number of threads used when compiling with cython to one,
  allow override via the `CYTHON_NTHREADS` environment variable, [#1074](https://github.com/pydantic/pydantic/pull/1074) by [@samuelcolvin](https://github.com/samuelcolvin)
* Run FastAPI tests during Pydantic's CI tests, [#1075](https://github.com/pydantic/pydantic/pull/1075) by [@tiangolo](https://github.com/tiangolo)
* My mypy strictness constraints, and associated tweaks to type annotations, [#1077](https://github.com/pydantic/pydantic/pull/1077) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add `__eq__` to SecretStr and SecretBytes to allow "value equals", [#1079](https://github.com/pydantic/pydantic/pull/1079) by [@sbv-trueenergy](https://github.com/sbv-trueenergy)
* Fix schema generation for nested None case, [#1088](https://github.com/pydantic/pydantic/pull/1088) by [@lutostag](https://github.com/lutostag)
* Consistent checks for sequence like objects, [#1090](https://github.com/pydantic/pydantic/pull/1090) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix `Config` inheritance on `BaseSettings` when used with `env_prefix`, [#1091](https://github.com/pydantic/pydantic/pull/1091) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix for `__modify_schema__` when it conflicted with `field_class_to_schema*`, [#1102](https://github.com/pydantic/pydantic/pull/1102) by [@samuelcolvin](https://github.com/samuelcolvin)
* docs: Fix explanation of case sensitive environment variable names when populating `BaseSettings` subclass attributes, [#1105](https://github.com/pydantic/pydantic/pull/1105) by [@tribals](https://github.com/tribals)
* Rename django-rest-framework benchmark in documentation, [#1119](https://github.com/pydantic/pydantic/pull/1119) by [@frankie567](https://github.com/frankie567)

## v1.2 (2019-11-28)

* **Possible Breaking Change:** Add support for required `Optional` with `name: Optional[AnyType] = Field(...)`
  and refactor `ModelField` creation to preserve `required` parameter value, [#1031](https://github.com/pydantic/pydantic/pull/1031) by [@tiangolo](https://github.com/tiangolo);
  see [here](https://docs.pydantic.dev/usage/models/#required-optional-fields) for details
* Add benchmarks for `cattrs`, [#513](https://github.com/pydantic/pydantic/pull/513) by [@sebastianmika](https://github.com/sebastianmika)
* Add `exclude_none` option to `dict()` and friends, [#587](https://github.com/pydantic/pydantic/pull/587) by [@niknetniko](https://github.com/niknetniko)
* Add benchmarks for `valideer`, [#670](https://github.com/pydantic/pydantic/pull/670) by [@gsakkis](https://github.com/gsakkis)
* Add `parse_obj_as` and `parse_file_as` functions for ad-hoc parsing of data into arbitrary pydantic-compatible types, [#934](https://github.com/pydantic/pydantic/pull/934) by [@dmontagu](https://github.com/dmontagu)
* Add `allow_reuse` argument to validators, thus allowing validator reuse, [#940](https://github.com/pydantic/pydantic/pull/940) by [@dmontagu](https://github.com/dmontagu)
* Add support for mapping types for custom root models, [#958](https://github.com/pydantic/pydantic/pull/958) by [@dmontagu](https://github.com/dmontagu)
* Mypy plugin support for dataclasses, [#966](https://github.com/pydantic/pydantic/pull/966) by [@koxudaxi](https://github.com/koxudaxi)
* Add support for dataclasses default factory, [#968](https://github.com/pydantic/pydantic/pull/968) by [@ahirner](https://github.com/ahirner)
* Add a `ByteSize` type for converting byte string (`1GB`) to plain bytes, [#977](https://github.com/pydantic/pydantic/pull/977) by [@dgasmith](https://github.com/dgasmith)
* Fix mypy complaint about `@root_validator(pre=True)`, [#984](https://github.com/pydantic/pydantic/pull/984) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add manylinux binaries for Python 3.8 to pypi, also support manylinux2010, [#994](https://github.com/pydantic/pydantic/pull/994) by [@samuelcolvin](https://github.com/samuelcolvin)
* Adds ByteSize conversion to another unit, [#995](https://github.com/pydantic/pydantic/pull/995) by [@dgasmith](https://github.com/dgasmith)
* Fix `__str__` and `__repr__` inheritance for models, [#1022](https://github.com/pydantic/pydantic/pull/1022) by [@samuelcolvin](https://github.com/samuelcolvin)
* add testimonials section to docs, [#1025](https://github.com/pydantic/pydantic/pull/1025) by [@sullivancolin](https://github.com/sullivancolin)
* Add support for `typing.Literal` for Python 3.8, [#1026](https://github.com/pydantic/pydantic/pull/1026) by [@dmontagu](https://github.com/dmontagu)

## v1.1.1 (2019-11-20)

* Fix bug where use of complex fields on sub-models could cause fields to be incorrectly configured, [#1015](https://github.com/pydantic/pydantic/pull/1015) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.1 (2019-11-07)

* Add a mypy plugin for type checking `BaseModel.__init__` and more, [#722](https://github.com/pydantic/pydantic/pull/722) by [@dmontagu](https://github.com/dmontagu)
* Change return type typehint for `GenericModel.__class_getitem__` to prevent PyCharm warnings, [#936](https://github.com/pydantic/pydantic/pull/936) by [@dmontagu](https://github.com/dmontagu)
* Fix usage of `Any` to allow `None`, also support `TypeVar` thus allowing use of un-parameterised collection types
  e.g. `Dict` and `List`, [#962](https://github.com/pydantic/pydantic/pull/962) by [@samuelcolvin](https://github.com/samuelcolvin)
* Set `FieldInfo` on subfields to fix schema generation for complex nested types, [#965](https://github.com/pydantic/pydantic/pull/965) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.0 (2019-10-23)

* **Breaking Change:** deprecate the `Model.fields` property, use `Model.__fields__` instead, [#883](https://github.com/pydantic/pydantic/pull/883) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking Change:** Change the precedence of aliases so child model aliases override parent aliases,
  including using `alias_generator`, [#904](https://github.com/pydantic/pydantic/pull/904) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking change:** Rename `skip_defaults` to `exclude_unset`, and add ability to exclude actual defaults, [#915](https://github.com/pydantic/pydantic/pull/915) by [@dmontagu](https://github.com/dmontagu)
* Add `**kwargs` to `pydantic.main.ModelMetaclass.__new__` so `__init_subclass__` can take custom parameters on extended
  `BaseModel` classes, [#867](https://github.com/pydantic/pydantic/pull/867) by [@retnikt](https://github.com/retnikt)
* Fix field of a type that has a default value, [#880](https://github.com/pydantic/pydantic/pull/880) by [@koxudaxi](https://github.com/koxudaxi)
* Use `FutureWarning` instead of `DeprecationWarning` when `alias` instead of `env` is used for settings models, [#881](https://github.com/pydantic/pydantic/pull/881) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix issue with `BaseSettings` inheritance and `alias` getting set to `None`, [#882](https://github.com/pydantic/pydantic/pull/882) by [@samuelcolvin](https://github.com/samuelcolvin)
* Modify `__repr__` and `__str__` methods to be consistent across all public classes, add `__pretty__` to support
  python-devtools, [#884](https://github.com/pydantic/pydantic/pull/884) by [@samuelcolvin](https://github.com/samuelcolvin)
* deprecation warning for `case_insensitive` on `BaseSettings` config, [#885](https://github.com/pydantic/pydantic/pull/885) by [@samuelcolvin](https://github.com/samuelcolvin)
* For `BaseSettings` merge environment variables and in-code values recursively, as long as they create a valid object
  when merged together, to allow splitting init arguments, [#888](https://github.com/pydantic/pydantic/pull/888) by [@idmitrievsky](https://github.com/idmitrievsky)
* change secret types example, [#890](https://github.com/pydantic/pydantic/pull/890) by [@ashears](https://github.com/ashears)
* Change the signature of `Model.construct()` to be more user-friendly, document `construct()` usage, [#898](https://github.com/pydantic/pydantic/pull/898) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add example for the `construct()` method, [#907](https://github.com/pydantic/pydantic/pull/907) by [@ashears](https://github.com/ashears)
* Improve use of `Field` constraints on complex types, raise an error if constraints are not enforceable,
  also support tuples with an ellipsis `Tuple[X, ...]`, `Sequence` and `FrozenSet` in schema, [#909](https://github.com/pydantic/pydantic/pull/909) by [@samuelcolvin](https://github.com/samuelcolvin)
* update docs for bool missing valid value, [#911](https://github.com/pydantic/pydantic/pull/911) by [@trim21](https://github.com/trim21)
* Better `str`/`repr` logic for `ModelField`, [#912](https://github.com/pydantic/pydantic/pull/912) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix `ConstrainedList`, update schema generation to reflect `min_items` and `max_items` `Field()` arguments, [#917](https://github.com/pydantic/pydantic/pull/917) by [@samuelcolvin](https://github.com/samuelcolvin)
* Allow abstracts sets (eg. dict keys) in the `include` and `exclude` arguments of `dict()`, [#921](https://github.com/pydantic/pydantic/pull/921) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix JSON serialization errors on `ValidationError.json()` by using `pydantic_encoder`, [#922](https://github.com/pydantic/pydantic/pull/922) by [@samuelcolvin](https://github.com/samuelcolvin)
* Clarify usage of `remove_untouched`, improve error message for types with no validators, [#926](https://github.com/pydantic/pydantic/pull/926) by [@retnikt](https://github.com/retnikt)

## v1.0b2 (2019-10-07)

* Mark `StrictBool` typecheck as `bool` to allow for default values without mypy errors, [#690](https://github.com/pydantic/pydantic/pull/690) by [@dmontagu](https://github.com/dmontagu)
* Transfer the documentation build from sphinx to mkdocs, re-write much of the documentation, [#856](https://github.com/pydantic/pydantic/pull/856) by [@samuelcolvin](https://github.com/samuelcolvin)
* Add support for custom naming schemes for `GenericModel` subclasses, [#859](https://github.com/pydantic/pydantic/pull/859) by [@dmontagu](https://github.com/dmontagu)
* Add `if TYPE_CHECKING:` to the excluded lines for test coverage, [#874](https://github.com/pydantic/pydantic/pull/874) by [@dmontagu](https://github.com/dmontagu)
* Rename `allow_population_by_alias` to `allow_population_by_field_name`, remove unnecessary warning about it, [#875](https://github.com/pydantic/pydantic/pull/875) by [@samuelcolvin](https://github.com/samuelcolvin)

## v1.0b1 (2019-10-01)

* **Breaking Change:** rename `Schema` to `Field`, make it a function to placate mypy, [#577](https://github.com/pydantic/pydantic/pull/577) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking Change:** modify parsing behavior for `bool`, [#617](https://github.com/pydantic/pydantic/pull/617) by [@dmontagu](https://github.com/dmontagu)
* **Breaking Change:** `get_validators` is no longer recognised, use `__get_validators__`.
  `Config.ignore_extra` and `Config.allow_extra` are no longer recognised, use `Config.extra`, [#720](https://github.com/pydantic/pydantic/pull/720) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking Change:** modify default config settings for `BaseSettings`; `case_insensitive` renamed to `case_sensitive`,
  default changed to `case_sensitive = False`, `env_prefix` default changed to `''` - e.g. no prefix, [#721](https://github.com/pydantic/pydantic/pull/721) by [@dmontagu](https://github.com/dmontagu)
* **Breaking change:** Implement `root_validator` and rename root errors from `__obj__` to `__root__`, [#729](https://github.com/pydantic/pydantic/pull/729) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking Change:** alter the behaviour of `dict(model)` so that sub-models are nolonger
  converted to dictionaries, [#733](https://github.com/pydantic/pydantic/pull/733) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking change:** Added `initvars` support to `post_init_post_parse`, [#748](https://github.com/pydantic/pydantic/pull/748) by [@Raphael-C-Almeida](https://github.com/Raphael-C-Almeida)
* **Breaking Change:** Make `BaseModel.json()` only serialize the `__root__` key for models with custom root, [#752](https://github.com/pydantic/pydantic/pull/752) by [@dmontagu](https://github.com/dmontagu)
* **Breaking Change:** complete rewrite of `URL` parsing logic, [#755](https://github.com/pydantic/pydantic/pull/755) by [@samuelcolvin](https://github.com/samuelcolvin)
* **Breaking Change:** preserve superclass annotations for field-determination when not provided in subclass, [#757](https://github.com/pydantic/pydantic/pull/757) by [@dmontagu](https://github.com/dmontagu)
* **Breaking Change:** `BaseSettings` now uses the special `env` settings to define which environment variables to
  read, not aliases, [#847](https://github.com/pydantic/pydantic/pull/847) by [@samuelcolvin](https://github.com/samuelcolvin)
* add support for `assert` statements inside validators, [#653](https://github.com/pydantic/pydantic/pull/653) by [@abdusco](https://github.com/abdusco)
* Update documentation to specify the use of `pydantic.dataclasses.dataclass` and subclassing `pydantic.BaseModel`, [#710](https://github.com/pydantic/pydantic/pull/710) by [@maddosaurus](https://github.com/maddosaurus)
* Allow custom JSON decoding and encoding via `json_loads` and `json_dumps` `Config` properties, [#714](https://github.com/pydantic/pydantic/pull/714) by [@samuelcolvin](https://github.com/samuelcolvin)
* make all annotated fields occur in the order declared, [#715](https://github.com/pydantic/pydantic/pull/715) by [@dmontagu](https://github.com/dmontagu)
* use pytest to test `mypy` integration, [#735](https://github.com/pydantic/pydantic/pull/735) by [@dmontagu](https://github.com/dmontagu)
* add `__repr__` method to `ErrorWrapper`, [#738](https://github.com/pydantic/pydantic/pull/738) by [@samuelcolvin](https://github.com/samuelcolvin)
* Added support for `FrozenSet` members in dataclasses, and a better error when attempting to use types from the `typing` module that are not supported by Pydantic, [#745](https://github.com/pydantic/pydantic/pull/745) by [@djpetti](https://github.com/djpetti)
* add documentation for Pycharm Plugin, [#750](https://github.com/pydantic/pydantic/pull/750) by [@koxudaxi](https://github.com/koxudaxi)
* fix broken examples in the docs, [#753](https://github.com/pydantic/pydantic/pull/753) by [@dmontagu](https://github.com/dmontagu)
* moving typing related objects into `pydantic.typing`, [#761](https://github.com/pydantic/pydantic/pull/761) by [@samuelcolvin](https://github.com/samuelcolvin)
* Minor performance improvements to `ErrorWrapper`, `ValidationError` and datetime parsing, [#763](https://github.com/pydantic/pydantic/pull/763) by [@samuelcolvin](https://github.com/samuelcolvin)
* Improvements to `datetime`/`date`/`time`/`timedelta` types: more descriptive errors,
  change errors to `value_error` not `type_error`, support bytes, [#766](https://github.com/pydantic/pydantic/pull/766) by [@samuelcolvin](https://github.com/samuelcolvin)
* fix error messages for `Literal` types with multiple allowed values, [#770](https://github.com/pydantic/pydantic/pull/770) by [@dmontagu](https://github.com/dmontagu)
* Improved auto-generated `title` field in JSON schema by converting underscore to space, [#772](https://github.com/pydantic/pydantic/pull/772) by [@skewty](https://github.com/skewty)
* support `mypy --no-implicit-reexport` for dataclasses, also respect `--no-implicit-reexport` in pydantic itself, [#783](https://github.com/pydantic/pydantic/pull/783) by [@samuelcolvin](https://github.com/samuelcolvin)
* add the `PaymentCardNumber` type, [#790](https://github.com/pydantic/pydantic/pull/790) by [@matin](https://github.com/matin)
* Fix const validations for lists, [#794](https://github.com/pydantic/pydantic/pull/794) by [@hmvp](https://github.com/hmvp)
* Set `additionalProperties` to false in schema for models with extra fields disallowed, [#796](https://github.com/pydantic/pydantic/pull/796) by [@Code0x58](https://github.com/Code0x58)
* `EmailStr` validation method now returns local part case-sensitive per RFC 5321, [#798](https://github.com/pydantic/pydantic/pull/798) by [@henriklindgren](https://github.com/henriklindgren)
* Added ability to validate strictness to `ConstrainedFloat`, `ConstrainedInt` and `ConstrainedStr` and added
  `StrictFloat` and `StrictInt` classes, [#799](https://github.com/pydantic/pydantic/pull/799) by [@DerRidda](https://github.com/DerRidda)
* Improve handling of `None` and `Optional`, replace `whole` with `each_item` (inverse meaning, default `False`)
  on validators, [#803](https://github.com/pydantic/pydantic/pull/803) by [@samuelcolvin](https://github.com/samuelcolvin)
* add support for `Type[T]` type hints, [#807](https://github.com/pydantic/pydantic/pull/807) by [@timonbimon](https://github.com/timonbimon)
* Performance improvements from removing `change_exceptions`, change how pydantic error are constructed, [#819](https://github.com/pydantic/pydantic/pull/819) by [@samuelcolvin](https://github.com/samuelcolvin)
* Fix the error message arising when a `BaseModel`-type model field causes a `ValidationError` during parsing, [#820](https://github.com/pydantic/pydantic/pull/820) by [@dmontagu](https://github.com/dmontagu)
* allow `getter_dict` on `Config`, modify `GetterDict` to be more like a `Mapping` object and thus easier to work with, [#821](https://github.com/pydantic/pydantic/pull/821) by [@samuelcolvin](https://github.com/samuelcolvin)
* Only check `TypeVar` param on base `GenericModel` class, [#842](https://github.com/pydantic/pydantic/pull/842) by [@zpencerq](https://github.com/zpencerq)
* rename `Model._schema_cache` -> `Model.__schema_cache__`, `Model._json_encoder` -> `Model.__json_encoder__`,
  `Model._custom_root_type` -> `Model.__custom_root_type__`, [#851](https://github.com/pydantic/pydantic/pull/851) by [@samuelcolvin](https://github.com/samuelcolvin)


... see [here](https://docs.pydantic.dev/changelog/#v0322-2019-08-17) for earlier changes.
