def _register_do_nothing_migrations(self, app):
# Register a do-nothing migration into app
@migration(app, 1)
class DoNothingMigration(Migration):
@classmethod
def apply(cls, cur, **kwargs):
cur.execute('SELECT 1 FROM test_migrations')
@classmethod
def unapply(cls, cur):
cur.execute('SELECT 2 FROM test_migrations')
MigrationManager.add_migration(app, 2, DoNothingMigration)
