replace MetaGroups by proper group management

core/migrations/0001_initial.py

@@ -563,14 +563,21 @@ class Migration(migrations.Migration):
             fields=[],
             options={"proxy": True},
             bases=("core.group",),
-            managers=[("objects", core.models.MetaGroupManager())],
+            managers=[("objects", django.contrib.auth.models.GroupManager())],
         ),
+        # at first, there existed a RealGroupManager and a RealGroupManager,
+        # which have been since been removed.
+        # However, this removal broke the migrations because it caused an ImportError.
+        # Thus, the managers MetaGroupManager (above) and RealGroupManager (below)
+        # have been replaced by the base django GroupManager to fix the import.
+        # As those managers aren't actually used in migrations,
+        # this replacement doesn't break anything.
         migrations.CreateModel(
             name="RealGroup",
             fields=[],
             options={"proxy": True},
             bases=("core.group",),
-            managers=[("objects", core.models.RealGroupManager())],
+            managers=[("objects", django.contrib.auth.models.GroupManager())],
         ),
         migrations.AlterUniqueTogether(
             name="page", unique_together={("name", "parent")}

core/migrations/0041_delete_metagroup_alter_group_options_and_more.py

@@ -0,0 +1,51 @@
+# Generated by Django 4.2.16 on 2024-11-30 13:16
+
+from django.db import migrations, models
+from django.db.migrations.state import StateApps
+from django.db.models import F
+
+
+def invert_is_manually_manageable(apps: StateApps, schema_editor):
+    """Invert `is_manually_manageable`.
+
+    This field is a renaming of `is_meta`.
+    However, the meaning has been inverted : the groups
+    which were meta are not manually manageable and vice versa.
+    Thus, the value must be inverted.
+    """
+    Group = apps.get_model("core", "Group")
+    Group.objects.all().update(is_manually_manageable=~F("is_manually_manageable"))
+
+
+class Migration(migrations.Migration):
+    dependencies = [("core", "0040_alter_user_options_user_user_permissions_and_more")]
+
+    operations = [
+        migrations.DeleteModel(
+            name="MetaGroup",
+        ),
+        migrations.DeleteModel(
+            name="RealGroup",
+        ),
+        migrations.AlterModelOptions(
+            name="group",
+            options={},
+        ),
+        migrations.RenameField(
+            model_name="group",
+            old_name="is_meta",
+            new_name="is_manually_manageable",
+        ),
+        migrations.AlterField(
+            model_name="group",
+            name="is_manually_manageable",
+            field=models.BooleanField(
+                default=False,
+                help_text="If False, this shouldn't be shown on group management pages",
+                verbose_name="Is manually manageable",
+            ),
+        ),
+        migrations.RunPython(
+            invert_is_manually_manageable, reverse_code=invert_is_manually_manageable
+        ),
+    ]