migrations/env.py
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.

    """
    url = get_database_url()
    connectible = create_engine(
        url,
        poolclass=pool.NullPool
    )

    with connectible.connect() as connection:
        context.configure(
            connection=connection,
            target_metadata=target_metadata
        )

        with context.begin_transaction():
            context.run_migrations()
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.
In this scenario we need to create an Engine
and associate a connection with the context.
Run migrations in ' online ' mode . In this scenario we need to create an Engine and associate a connection with the context .
def run_migrations_online():
    url = get_database_url()
    connectible = create_engine(
        url,
        poolclass=pool.NullPool
    )
    with connectible.connect() as connection:
        context.configure(
            connection=connection,
            target_metadata=target_metadata
        )
        with context.begin_transaction():
            context.run_migrations()
def run_migrations_online ( ) : url = get_database_url ( ) connectible = create_engine ( url , poolclass = pool . NullPool ) with connectible . connect ( ) as connection : context . configure ( connection = connection , target_metadata = target_metadata ) with context . begin_transaction ( ) : context . run_migrations ( )
Run migrations in 'online' mode.
Run migrations in ' online ' mode .
"""Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """