groups: Create NamedUserGroup table.

zerver/migrations/0512_namedusergroup.py

@@ -0,0 +1,56 @@
+# Generated by Django 4.2.12 on 2024-04-19 03:44
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("zerver", "0511_stream_creator"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="NamedUserGroup",
+            fields=[
+                (
+                    "usergroup_ptr",
+                    models.OneToOneField(
+                        auto_created=True,
+                        on_delete=django.db.models.deletion.CASCADE,
+                        parent_link=True,
+                        primary_key=True,
+                        related_name="named_user_group",
+                        serialize=False,
+                        to="zerver.usergroup",
+                    ),
+                ),
+                ("named_group_name", models.CharField(db_column="name", max_length=100)),
+                ("named_group_description", models.TextField(db_column="description", default="")),
+                (
+                    "named_group_is_system_group",
+                    models.BooleanField(db_column="is_system_group", default=False),
+                ),
+                (
+                    "named_group_can_mention_group",
+                    models.ForeignKey(
+                        db_column="can_mention_group_id",
+                        on_delete=django.db.models.deletion.RESTRICT,
+                        to="zerver.usergroup",
+                    ),
+                ),
+                (
+                    "realm_for_sharding",
+                    models.ForeignKey(
+                        db_column="realm_id",
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="zerver.realm",
+                    ),
+                ),
+            ],
+            options={
+                "unique_together": {("realm_for_sharding", "named_group_name")},
+            },
+            bases=("zerver.usergroup",),
+        ),
+    ]