snapshot of https://github.com/zulip/zulip.git @ 48c69911c7dd4e03b20552eb3bd77ad8151c1357 (2026-09-15)

zerver/migrations/0240_usermessage_migrate_bigint_id_into_id.py

@@ -0,0 +1,58 @@
+# Generated by Django 1.11.23 on 2019-08-23 21:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("zerver", "0239_usermessage_copy_id_to_bigint_id"),
+    ]
+
+    # Note that this migration needs to work whether
+    # zerver_usermessage.bigint_id was created as a serial column (for
+    # Zulip initially installed with Django < 4.1) or an identity
+    # column (for Zulip initially installed with Django ≥ 4.1).  If
+    # you need to edit it, remember to test both cases.
+
+    operations = [
+        migrations.RunSQL(
+            """
+            DROP TRIGGER zerver_usermessage_bigint_id_to_id_trigger ON zerver_usermessage;
+            DROP FUNCTION zerver_usermessage_bigint_id_to_id_trigger_function();
+
+            ALTER TABLE zerver_usermessage
+                ALTER COLUMN bigint_id SET NOT NULL,
+                DROP CONSTRAINT zerver_usermessage_pkey,
+                ALTER COLUMN id DROP IDENTITY IF EXISTS,
+                ALTER COLUMN id DROP NOT NULL,
+                ALTER COLUMN id DROP DEFAULT;
+            ALTER TABLE zerver_usermessage RENAME COLUMN id TO id_old;
+            ALTER TABLE zerver_usermessage RENAME COLUMN bigint_id TO id;
+            DROP SEQUENCE IF EXISTS zerver_usermessage_id_seq;
+            ALTER TABLE zerver_usermessage
+                ADD CONSTRAINT zerver_usermessage_pkey PRIMARY KEY USING INDEX zerver_usermessage_bigint_id_idx,
+                ALTER COLUMN id ADD GENERATED BY DEFAULT AS IDENTITY;
+            SELECT setval(
+                'zerver_usermessage_id_seq',
+                GREATEST(
+                    (SELECT max(id) FROM zerver_usermessage),
+                    (SELECT max(id) FROM zerver_archivedusermessage)
+                )
+            );
+            """,
+            state_operations=[
+                # This just tells Django to understand executing the above SQL as if it just ran the operations below,
+                # so that it knows these model changes are handled and doesn't to generate them on its own
+                # in the future makemigration calls.
+                migrations.RemoveField(
+                    model_name="usermessage",
+                    name="bigint_id",
+                ),
+                migrations.AlterField(
+                    model_name="usermessage",
+                    name="id",
+                    field=models.BigAutoField(primary_key=True, serialize=False),
+                ),
+            ],
+        ),
+    ]