On Jan 19, 2011, at 1:29 PM, AgentOrange wrote: > Hi ho, > > Thanks for the swift reply! > >> Did you use uselist=False on foo.bar and the associationproxy? It would nice >> if you could show some >> code.http://www.sqlalchemy.org/docs/orm/extensions/associationproxy.html?h... > > Yes I did. The code is more complicated as it has a bunch of other > stuff in it, but here's a condensation: > > class Foo(Base): > id = Column(Integer, primary_key = True) > foo_bar_join = relationship(FooBar, primaryjoin = (id == > FooBar.id_foo), uselist = False) > bar = association_proxy('foo_bar_join', 'bar', creator = lambda x: > FooBar(bar = x) ) > > class Bar(Base): > id = Column(Integer, primary_key = True) > > class FooBar(Base): > id_foo = Column(Integer, ForeignKey('foo.id'), primary_key = True) > id_bar = Column(Integer, ForeignKey('bar.id'), primary_key = True) > > bar = relationship(Bar, primaryjoin = (id_bar == Bar.id)) > other_stuff = Column(Integer) > > The problem comes if you try to fetch 'bar' from an instance of 'Foo' > for which there is no entry in the "foo_bar" join table.
Maybe you can squelch the exception by using a synonym with the descriptor argument to map to a fake property. Cheers, M -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
