mik wrote:
> Hello,
>
> I am trying to use sqlalchemy with oracle, here is my code:
>
> from sqlalchemy import *
> from sqlalchemy.orm import sessionmaker, mapper, relationship
> class Activite(object):
> pass
> class Famprod(object):
> pass
> engine = create_engine('oracle://login/paswd@db', echo=True)
> metadata = MetaData(engine)
> tActivite = Table('ACTIVITE', metadata,
> autoload=True)
> mapper(Activite, tActivite)
> tFamprod = Table('FAMPROD', metadata,
> autoload=True)
> mapper(Famprod, tFamprod)
> Famprod.activite = relationship(Activite)
> Session = sessionmaker(bind=engine)
> session = Session()
> famprod = session.query(Famprod).get(("ED", "15"))
> print famprod.activite
>
>
> and i get this error:
> AttributeError: 'RelationshipProperty' object has no attribute
> 'parent'
>
> The table famprod has a composite key, one of the key columns is the
> key of activite.
> Is there something wrong with my code ?
> I have tried to manually define the tFamprod's keys and foreign key
> without succes.
>
> Thank you.
>
I think your problem is here:
mapper(Famprod, tFamprod)
Famprod.activite = relationship(Activite)
You can't add relationship properties to mapped classes, unless they
were set up with the declarative extension
(http://www.sqlalchemy.org/docs/orm/extensions/declarative.html).
Without declarative, the code should look something like this:
mapper(Famprod, tFamprod, properties={
'activite': relationship(Activite),
})
(http://www.sqlalchemy.org/docs/orm/relationships.html#one-to-many)
Hope that helps,
Simon
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