On Apr 26, 2013, at 5:46 AM, Andi Blake <andi.ba...@googlemail.com> wrote:
> i'm still interested in the solution of > http://docs.sqlalchemy.org/en/rel_0_7/orm/session.html#simple-vertical-partitioning > since it toke me some time and i don't like having such an open issue ;) > this is my original scenario, having two ``DeclarativeBase``, one for the > ``site``, one for the ``market``. As you said, i changed the relationship to > ``user = sa.orm.relationship(User, foreign_keys=[User.id])`` which changes > the exception to:: > > sqlalchemy.exc.NoReferencedTableError: Foreign key associated with column > 'product_items.user_id' could not find table 'users' with which to generate a > foreign key to target column 'id' > > this happens even though the schema is also assigned in the ``User`` class:: > > @timestampable() > class User(DeclarativeBase): > > # necessary to create references from the market to this users > __table_args__ = {'schema': SITE_DATABASE_SCHEMA_NAME} > > id = sa.Column(sa.BigInteger, > Sequence('users_seq_id', optional=True), > primary_key=True) > > > class ProductItem(Base): > user_id = sa.Column( > sa.BigInteger, > sa.ForeignKey('%s.%s.id' % (SITE_DATABASE_SCHEMA_NAME, > User.__tablename__)), > primary_key=True > ) > user = sa.orm.relationship(User, foreign_keys=[User.id]) > > do you have a hint how to tell sqlalchemy to choose ``site.users`` rather > than ``users`` as table? that should be correct, if User has "schema='site'" and ProductItem has "schema='market'", then a ForeignKey on ProductItem should refer to "site.user.id". But similarly with the "User" issue, ForeignKey looks inside of the local MetaData collection to find the other table, and I see that User() has a different "Base" than ProductItem, which is the home base for a MetaData. So you can alternatively specify the ForeignKey like "ForeignKey(User.__table__.c.id)" if you want to cross over two MetaData collections. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
