id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 32334 Backwards migration with RenameModel om MySQL failing with content_type.name does not exist Gerben Morsink nobody "I have a relatively simple migration: {{{ migrations.RenameModel( old_name='OldModel', new_name='NewModel', ), }}} which is executed fine. After which I do {{{python manage.py remove_stale_contenttypes}}} When I then revert the migration, I'm unexpectantly receiving the following error: {{{ Unapplying someapp.0002_auto_20210107_2123...Traceback (most recent call last): File ""/home/lib/python3.8/site-packages/django/contrib/contenttypes/models.py"", line 19, in get_by_natural_key ct = self._cache[self.db][(app_label, model)] KeyError: 'default' During handling of the above exception, another exception occurred: Traceback (most recent call last): File ""/home/lib/python3.8/site-packages/django/db/backends/utils.py"", line 84, in _execute return self.cursor.execute(sql, params) File ""/home/lib/python3.8/site-packages/django/db/backends/mysql/base.py"", line 71, in execute return self.cursor.execute(query, args) File ""/home/lib/python3.8/site-packages/MySQLdb/cursors.py"", line 206, in execute res = self._query(query) File ""/home/lib/python3.8/site-packages/MySQLdb/cursors.py"", line 319, in _query db.query(q) File ""/home/lib/python3.8/site-packages/MySQLdb/connections.py"", line 259, in query _mysql.connection.query(self, query) MySQLdb._exceptions.OperationalError: (1054, ""Unknown column 'django_content_type.name' in 'field list'"") The above exception was the direct cause of the following exception: Traceback (most recent call last): File ""manage.py"", line 10, in execute_from_command_line(sys.argv) File ""/home/lib/python3.8/site-packages/django/core/management/__init__.py"", line 381, in execute_from_command_line utility.execute() File ""/home/lib/python3.8/site-packages/django/core/management/__init__.py"", line 375, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File ""/home/lib/python3.8/site-packages/django/core/management/base.py"", line 323, in run_from_argv self.execute(*args, **cmd_options) File ""/home/lib/python3.8/site-packages/django/core/management/base.py"", line 364, in execute output = self.handle(*args, **options) File ""/home/lib/python3.8/site-packages/django/core/management/base.py"", line 83, in wrapped res = handle_func(*args, **kwargs) File ""/home/lib/python3.8/site-packages/django/core/management/commands/migrate.py"", line 232, in handle post_migrate_state = executor.migrate( File ""/home/lib/python3.8/site-packages/django/db/migrations/executor.py"", line 121, in migrate state = self._migrate_all_backwards(plan, full_plan, fake=fake) File ""/home/lib/python3.8/site-packages/django/db/migrations/executor.py"", line 196, in _migrate_all_backwards self.unapply_migration(states[migration], migration, fake=fake) File ""/home/lib/python3.8/site-packages/django/db/migrations/executor.py"", line 269, in unapply_migration state = migration.unapply(state, schema_editor) File ""/home/lib/python3.8/site-packages/django/db/migrations/migration.py"", line 172, in unapply operation.database_backwards(self.app_label, schema_editor, from_state, to_state) File ""/home/lib/python3.8/site-packages/django/db/migrations/operations/special.py"", line 196, in database_backwards self.reverse_code(from_state.apps, schema_editor) File ""/home/lib/python3.8/site-packages/django/contrib/contenttypes/management/__init__.py"", line 42, in rename_backward self._rename(apps, schema_editor, self.new_model, self.old_model) File ""/home/lib/python3.8/site-packages/django/contrib/contenttypes/management/__init__.py"", line 20, in _rename content_type = ContentType.objects.db_manager(db).get_by_natural_key(self.app_label, old_model) File ""/home/lib/python3.8/site-packages/django/contrib/contenttypes/models.py"", line 21, in get_by_natural_key ct = self.get(app_label=app_label, model=model) File ""/home/lib/python3.8/site-packages/django/db/models/manager.py"", line 82, in manager_method return getattr(self.get_queryset(), name)(*args, **kwargs) File ""/home/lib/python3.8/site-packages/django/db/models/query.py"", line 402, in get num = len(clone) File ""/home/lib/python3.8/site-packages/django/db/models/query.py"", line 256, in __len__ self._fetch_all() File ""/home/lib/python3.8/site-packages/django/db/models/query.py"", line 1242, in _fetch_all self._result_cache = list(self._iterable_class(self)) File ""/home/lib/python3.8/site-packages/django/db/models/query.py"", line 55, in __iter__ results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size) File ""/home/lib/python3.8/site-packages/django/db/models/sql/compiler.py"", line 1142, in execute_sql cursor.execute(sql, params) File ""/home/lib/python3.8/site-packages/django/db/backends/utils.py"", line 99, in execute return super().execute(sql, params) File ""/home/lib/python3.8/site-packages/django/db/backends/utils.py"", line 67, in execute return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) File ""/home/lib/python3.8/site-packages/django/db/backends/utils.py"", line 76, in _execute_with_wrappers return executor(sql, params, many, context) File ""/home/lib/python3.8/site-packages/django_mysql/apps.py"", line 52, in rewrite_hook return execute(sql, params, many, context) File ""/home/lib/python3.8/site-packages/django/db/backends/utils.py"", line 84, in _execute return self.cursor.execute(sql, params) File ""/home/lib/python3.8/site-packages/django/db/utils.py"", line 89, in __exit__ raise dj_exc_value.with_traceback(traceback) from exc_value File ""/home/lib/python3.8/site-packages/django/db/backends/utils.py"", line 84, in _execute return self.cursor.execute(sql, params) File ""/home/lib/python3.8/site-packages/django/db/backends/mysql/base.py"", line 71, in execute return self.cursor.execute(query, args) File ""/home/lib/python3.8/site-packages/MySQLdb/cursors.py"", line 206, in execute res = self._query(query) File ""/home/lib/python3.8/site-packages/MySQLdb/cursors.py"", line 319, in _query db.query(q) File ""/home/lib/python3.8/site-packages/MySQLdb/connections.py"", line 259, in query _mysql.connection.query(self, query) django.db.utils.OperationalError: (1054, ""Unknown column 'django_content_type.name' in 'field list'"") }}} I find it very weird to receive this error on Django 2.2, since content_type.name is removed back in Django version 1.8." Bug closed Database layer (models, ORM) 2.2 Normal invalid Adam Johnson Unreviewed 0 0 0 0 0 0