minor edits to widgets.py to satisfy missing attributes test case, completed and passing test case for new filtered select functionality

.gitignore

@@ -20,4 +20,5 @@ tests/screenshots/
 venv/
 .venv/
 env/
-.env/
+.env/
+myproject/staticfiles

django/contrib/admin/widgets.py

@@ -40,6 +40,10 @@ class FilteredSelectMultiple(forms.SelectMultiple):
         super().__init__(attrs, choices)
     
     def get_context(self, name, value, attrs):
+        if name is None:
+            name = "None"
+        if attrs is None:
+            attrs = {}
         context = super().get_context(name, value, attrs)
         widget_attrs = context["widget"]["attrs"]
         widget_attrs["class"] = "selectfilter"

myproject/admin.py

@@ -0,0 +1,22 @@
+from django.contrib import admin
+from django.forms import ModelForm
+from django.contrib.admin.widgets import FilteredSelectMultiple
+from .models import ParentModel, ChildModel
+
+class ChildModelForm(ModelForm):
+    class Meta:
+        model = ChildModel
+        fields = '__all__'
+        widgets = {
+            'related_field': FilteredSelectMultiple('Related Items', False),
+        }
+
+class ChildInline(admin.TabularInline):
+    model = ChildModel
+    form = ChildModelForm
+    extra = 1
+
+class ParentModelAdmin(admin.ModelAdmin):
+    inlines = [ChildInline]
+
+admin.site.register(ParentModel, ParentModelAdmin)

myproject/manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python
+"""Django's command-line utility for administrative tasks."""
+import os
+import sys
+
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)
+
+
+if __name__ == '__main__':
+    main()

myproject/models.py

@@ -0,0 +1,14 @@
+from django.db import models
+
+class ParentModel(models.Model):
+    name = models.CharField(max_length=255)
+
+    def __str__(self):
+        return self.name
+
+class ChildModel(models.Model):
+    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE, related_name="children")
+    related_field = models.ManyToManyField(ParentModel, related_name="related_items")
+
+    def __str__(self):
+        return f"Child of {self.parent.name}"

myproject/myapp/admin.py

@@ -0,0 +1,22 @@
+from django.contrib import admin
+from django.forms import ModelForm
+from django.contrib.admin.widgets import FilteredSelectMultiple
+from .models import ParentModel, ChildModel
+
+class ChildModelForm(ModelForm):
+    class Meta:
+        model = ChildModel
+        fields = '__all__'
+        widgets = {
+            'related_field': FilteredSelectMultiple('Related Items', False),
+        }
+
+class ChildInline(admin.TabularInline):
+    model = ChildModel
+    form = ChildModelForm
+    extra = 1
+
+class ParentModelAdmin(admin.ModelAdmin):
+    inlines = [ChildInline]
+
+admin.site.register(ParentModel, ParentModelAdmin)

myproject/myapp/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class MyappConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'myapp'

myproject/myapp/migrations/0001_initial.py

@@ -0,0 +1,30 @@
+# Generated by Django 5.2.dev20241207001149 on 2024-12-08 21:12
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ParentModel',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='ChildModel',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('parent', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='children', to='myapp.parentmodel')),
+                ('related_field', models.ManyToManyField(related_name='related_items', to='myapp.parentmodel')),
+            ],
+        ),
+    ]

myproject/myapp/models.py

@@ -0,0 +1,14 @@
+from django.db import models
+
+class ParentModel(models.Model):
+    name = models.CharField(max_length=255)
+
+    def __str__(self):
+        return self.name
+
+class ChildModel(models.Model):
+    parent = models.ForeignKey(ParentModel, on_delete=models.CASCADE, related_name="children")
+    related_field = models.ManyToManyField(ParentModel, related_name="related_items")
+
+    def __str__(self):
+        return f"Child of {self.parent.name}"

myproject/myapp/tests.py

@@ -0,0 +1,47 @@
+from django.test import TestCase
+from django.contrib.admin.widgets import FilteredSelectMultiple
+
+class WidgetContextTests(TestCase):
+    def test_widget_context(self):
+        widget = FilteredSelectMultiple(verbose_name="Test Field", is_stacked=False)
+        context = widget.get_context(name="test", value=None, attrs={"id": "test_id"})
+        widget_attrs = context["widget"]["attrs"]
+
+        self.assertIn("class", widget_attrs)
+        self.assertEqual(widget_attrs["class"], "selectfilter")
+        self.assertEqual(widget_attrs["data-field-name"], "Test Field")
+        self.assertEqual(widget_attrs["data-is-stacked"], 0)
+        self.assertEqual(widget_attrs["id"], "test_id")
+
+    def test_widget_context_stacked(self):
+        widget = FilteredSelectMultiple(verbose_name="Test Field", is_stacked=True)
+        context = widget.get_context(name="test", value=None, attrs={"id": "test_id"})
+        widget_attrs = context["widget"]["attrs"]
+
+        self.assertIn("class", widget_attrs)
+        self.assertEqual(widget_attrs["class"], "selectfilterstacked")
+        self.assertEqual(widget_attrs["data-field-name"], "Test Field")
+        self.assertEqual(widget_attrs["data-is-stacked"], 1)
+        self.assertEqual(widget_attrs["id"], "test_id")
+
+    def test_widget_context_no_attrs(self):
+        widget = FilteredSelectMultiple(verbose_name="Test Field", is_stacked=False)
+        context = widget.get_context(name="test", value=None, attrs={})  # Use empty dict for attrs
+        widget_attrs = context["widget"]["attrs"]
+
+        self.assertIn("class", widget_attrs)
+        self.assertEqual(widget_attrs["class"], "selectfilter")
+        self.assertEqual(widget_attrs["data-field-name"], "Test Field")
+        self.assertEqual(widget_attrs["data-is-stacked"], 0)
+        self.assertEqual(widget_attrs["id"], "id_test")
+
+    def test_widget_context_missing_name_or_attrs(self):
+        widget = FilteredSelectMultiple(verbose_name="Test Field", is_stacked=False)
+
+        # Test with name=None and id not explicitly set
+        context = widget.get_context(name=None, value=None, attrs={})
+        self.assertEqual(context["widget"]["attrs"]["id"], "id_None")  # Default id format for None name
+
+        # Test with attrs=None, expecting it to default to an empty dict
+        context = widget.get_context(name="test", value=None, attrs=None)
+        self.assertEqual(context["widget"]["attrs"]["id"], "id_test")  # Default id format for valid name

myproject/myapp/views.py

@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.

myproject/myproject/asgi.py

@@ -0,0 +1,16 @@
+"""
+ASGI config for myproject project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/dev/howto/deployment/asgi/
+"""
+
+import os
+
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+
+application = get_asgi_application()

myproject/myproject/settings.py

@@ -0,0 +1,129 @@
+"""
+Django settings for myproject project.
+
+Generated by 'django-admin startproject' using Django 5.2.dev20241207001149.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/dev/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/dev/ref/settings/
+"""
+
+from pathlib import Path
+
+# Build paths inside the project like this: BASE_DIR / 'subdir'.
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+STATIC_ROOT = BASE_DIR / "staticfiles"
+
+STATICFILES_DIRS = [
+    BASE_DIR.parent / "js_tests",  # For the JavaScript tests
+    BASE_DIR.parent / "node_modules",  # Adjust the path for node_modules
+]
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/dev/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'django-insecure-!!3hix%_eqnt@=4-1-jdfv8&&&_nn8x1%0trmaz$03eeu#%yoe'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'myapp',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'myproject.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'myproject.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/dev/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': BASE_DIR / 'db.sqlite3',
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/dev/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/dev/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/dev/howto/static-files/
+
+STATIC_URL = 'static/'
+
+# Default primary key field type
+# https://docs.djangoproject.com/en/dev/ref/settings/#default-auto-field
+
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

myproject/myproject/urls.py

@@ -0,0 +1,27 @@
+"""
+URL configuration for myproject project.
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/dev/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  path('', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.urls import include, path
+    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+from django.conf import settings
+from django.conf.urls.static import static
+
+urlpatterns = [
+    path('admin/', admin.site.urls),
+]
+
+if settings.DEBUG:
+    urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)

myproject/myproject/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for myproject project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/dev/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+
+application = get_wsgi_application()