()
Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.
Run migrations in 'online' mode.
Run migrations in online mode .
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.

    """
    connectable = engine_from_config(
        config.get_section(config.config_ini_section),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    with connectable.connect() as connection:
        context.configure(
            connection=connection, target_metadata=target_metadata, render_as_batch=True
        )

        with context.begin_transaction():
            context.run_migrations()
def run_migrations_online ( ) : connectable = engine_from_config ( config . get_section ( config . config_ini_section ) , prefix = "sqlalchemy." , poolclass = pool . NullPool , ) with connectable . connect ( ) as connection : context . configure ( connection = connection , target_metadata = target_metadata , render_as_batch = True ) with context . begin_transaction ( ) : context . run_migrations ( )