91 lines
3.1 KiB
Python
91 lines
3.1 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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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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media = property(_media)
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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(related_url, 'foreignkey_autocomplete/')
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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(render_to_string(self.widget_template or (
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'django_extensions/widgets/%s/%s/foreignkey_searchinput.html' % (app_label, model_name),
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'django_extensions/widgets/%s/foreignkey_searchinput.html' % app_label,
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'django_extensions/widgets/foreignkey_searchinput.html',
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), context))
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output.reverse()
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return mark_safe(''.join(output))
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