Fixed #784 -- Added migrations autodetected by Django 4.0 (#785)

* Fixed #784 -- Added migrations autodetected by Django 4.0

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fixed import sorting

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

taggit/migrations/0004_alter_taggeditem_content_type_alter_taggeditem_tag.py

@@ -0,0 +1,36 @@
+# This migration has no effect in practice. It exists to stop
+# Django from autodetecting migrations in taggit when users
+# update to Django 4.0.
+# See https://docs.djangoproject.com/en/stable/releases/4.0/#migrations-autodetector-changes
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("contenttypes", "0002_remove_content_type_name"),
+        ("taggit", "0003_taggeditem_add_unique_index"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="taggeditem",
+            name="content_type",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="%(app_label)s_%(class)s_tagged_items",
+                to="contenttypes.contenttype",
+                verbose_name="content type",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="taggeditem",
+            name="tag",
+            field=models.ForeignKey(
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name="%(app_label)s_%(class)s_items",
+                to="taggit.tag",
+            ),
+        ),
+    ]

tests/tests.py

@@ -1,8 +1,10 @@
+from io import StringIO
 from unittest import mock
 
 from django.contrib.contenttypes.models import ContentType
 from django.core import serializers
 from django.core.exceptions import ValidationError
+from django.core.management import call_command
 from django.db import IntegrityError, connection, models
 from django.test import RequestFactory, SimpleTestCase, TestCase
 from django.test.utils import override_settings
@@ -1274,3 +1276,10 @@ def test_added_tags_are_returned_ordered(self):
             ["blue", "green", "orange", "red", "yellow"],
             list(obj.tags.values_list("name", flat=True)),
         )
+
+
+class PendingMigrationsTests(TestCase):
+    def test_taggit_has_no_pending_migrations(self):
+        out = StringIO()
+        call_command("makemigrations", "taggit", dry_run=True, stdout=out)
+        self.assertEqual(out.getvalue().strip(), "No changes detected in app 'taggit'")