101 lines
3.3 KiB
Python
101 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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import urllib
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from django import forms
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from django.contrib.admin.sites import site
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from django.contrib.admin.widgets import ForeignKeyRawIdWidget
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from django.template.loader import render_to_string
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from django.templatetags.static import static
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from django.urls import reverse
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from django.utils.safestring import mark_safe
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from django.utils.text import Truncator
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class ForeignKeySearchInput(ForeignKeyRawIdWidget):
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"""
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Widget for displaying ForeignKeys in an autocomplete search input
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instead in a <select> box.
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"""
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# Set in subclass to render the widget with a different template
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widget_template = None
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# Set this to the patch of the search view
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search_path = None
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@property
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def media(self):
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js_files = [
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static("django_extensions/js/jquery.bgiframe.js"),
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static("django_extensions/js/jquery.ajaxQueue.js"),
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static("django_extensions/js/jquery.autocomplete.js"),
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]
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return forms.Media(
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css={"all": (static("django_extensions/css/jquery.autocomplete.css"),)},
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js=js_files,
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)
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def label_for_value(self, value):
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key = self.rel.get_related_field().name
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obj = self.rel.model._default_manager.get(**{key: value})
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return Truncator(obj).words(14, truncate="...")
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def __init__(self, rel, search_fields, attrs=None):
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self.search_fields = search_fields
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super().__init__(rel, site, attrs)
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def render(self, name, value, attrs=None, renderer=None):
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if attrs is None:
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attrs = {}
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opts = self.rel.model._meta
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app_label = opts.app_label
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model_name = opts.object_name.lower()
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related_url = reverse("admin:%s_%s_changelist" % (app_label, model_name))
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if not self.search_path:
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self.search_path = urllib.parse.urljoin(
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related_url, "foreignkey_autocomplete/"
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)
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params = self.url_parameters()
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if params:
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url = "?" + "&".join(["%s=%s" % (k, v) for k, v in params.items()])
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else:
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url = ""
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if "class" not in attrs:
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attrs["class"] = "vForeignKeyRawIdAdminField"
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# Call the TextInput render method directly to have more control
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output = [forms.TextInput.render(self, name, value, attrs)]
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if value:
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label = self.label_for_value(value)
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else:
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label = ""
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context = {
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"url": url,
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"related_url": related_url,
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"search_path": self.search_path,
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"search_fields": ",".join(self.search_fields),
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"app_label": app_label,
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"model_name": model_name,
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"label": label,
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"name": name,
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}
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output.append(
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render_to_string(
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self.widget_template
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or (
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"django_extensions/widgets/%s/%s/foreignkey_searchinput.html"
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% (app_label, model_name),
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"django_extensions/widgets/%s/foreignkey_searchinput.html"
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% app_label,
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"django_extensions/widgets/foreignkey_searchinput.html",
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),
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context,
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)
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)
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output.reverse()
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return mark_safe("".join(output))
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