SQLAlchemy declarative syntax with autoload (reflection) in Pylons

Question

I would like to use autoload to use an existings database. I know how to do it without declarative syntax (model/_init_.py):

def init_model(engine):         


        

Answer 1

from sqlalchemy import MetaData,create_engine,Table
engine = create_engine('postgresql://postgres:********@localhost/db_name')

metadata = MetaData(bind=engine)

rivers = Table('rivers',metadata,autoload=True,auto_load_with=engine)

from sqlalchemy import select

s = select([rivers]).limit(5)
engine.execute(s).fetchall()

worked for me. I was getting the error because of not specifying bind when creating MetaData() object.