[3.2.x] Fixed #32374 -- Stopped recording migration application before deferred SQL.

Migrations cannot be recorded in the same transaction as its associated
DDL operations when some of it is deferred until the schema editor
context exits.

Regression in c86a3d80a2.

Backport of 0c42cdf0d2 from master

django/db/migrations/executor.py

@@ -225,6 +225,7 @@ class MigrationExecutor:
                 # Alright, do it normally
                 with self.connection.schema_editor(atomic=migration.atomic) as schema_editor:
                     state = migration.apply(state, schema_editor)
+                    if not schema_editor.deferred_sql:
                         self.record_migration(migration)
                         migration_recorded = True
         if not migration_recorded:

tests/migrations/test_executor.py

@@ -684,6 +684,33 @@ class ExecutorTests(MigrationTestBase):
         )
         self.assertTableNotExists('record_migration_model')
 
+    def test_migrations_not_applied_on_deferred_sql_failure(self):
+        """Migrations are not recorded if deferred SQL application fails."""
+        class DeferredSQL:
+            def __str__(self):
+                raise DatabaseError('Failed to apply deferred SQL')
+
+        class Migration(migrations.Migration):
+            atomic = False
+
+            def apply(self, project_state, schema_editor, collect_sql=False):
+                schema_editor.deferred_sql.append(DeferredSQL())
+
+        executor = MigrationExecutor(connection)
+        with self.assertRaisesMessage(DatabaseError, 'Failed to apply deferred SQL'):
+            executor.apply_migration(
+                ProjectState(),
+                Migration('0001_initial', 'deferred_sql'),
+            )
+        # The migration isn't recorded as applied since it failed.
+        migration_recorder = MigrationRecorder(connection)
+        self.assertIs(
+            migration_recorder.migration_qs.filter(
+                app='deferred_sql', name='0001_initial',
+            ).exists(),
+            False,
+        )
+
 
 class FakeLoader:
     def __init__(self, graph, applied):