def run_migrations_offline(): """Run migrations in 'offline' mode. This configures the context with just a URL and not an Engine, though an Engine is acceptable here as well. By skipping the Engine creation we don't even need a DBAPI to be available. Calls to context.execute() here emit the given string to the script output. """ context.configure(url=db_uri()) with context.begin_transaction(): context.run_migrations()
def run_migrations_online(): """Run migrations in 'online' mode. In this scenario we need to create an Engine and associate a connection with the context. """ engine = create_engine(db_uri(), poolclass=pool.NullPool) connection = engine.connect() context.configure( connection=connection, target_metadata=target_metadata ) try: with context.begin_transaction(): context.run_migrations() finally: connection.close()