Thanks for the explanation. I think a ".property" accessor on AssociationProxy is the right solution.
Right now I am doing something of this sort: User.groups._get_property().comparator but not sure if that's what should be done or not. On Jul 29, 7:20 am, Michael Bayer <mike...@zzzcomputing.com> wrote: > An association proxy is a Python descriptor attached to a class and by itself > is not anything like the InstrumentedAttribute/relationship() object used for > a relationship. So it cannot be passed to mapper options that expect > InstrumentedAttribute, or those options need to be enhanced to detect when an > association proxy is passed in, which would be to check for its class as an > AssociationProxy object, then call _get_property() on it to get the ultimate > relationship(). > > It would be a good idea for us to stick a ".property" accessor on > AssociationProxy so this kind of thing would work automatically but I'd want > to have tests that it works under all kinds of join()/options() scenarios. > added #2236 for that. > > On Jul 29, 2011, at 12:32 AM, espresso maker wrote: > > > > > > > > > Anyone know of another sqlalchemy + beaker example I can look it? > > > On Jul 27, 2:05 pm, espresso maker <espressso.ma...@gmail.com> wrote: > >> Hi there, > > >> I am trying to follow the setup in this > >> examplehttp://www.sqlalchemy.org/trac/browser/examples/beaker_cachingto > >> enable beaker caching in sqlalchemy. However, I ran into an issue. > > >> #1. When I try to cache a relation that happens to be an association > >> proxy I get the following error: > > >> AttributeError: 'AssociationProxy' object has no attribute 'property' > > >> This is how my query looks like: > > >> def get_user(user_id): > >> return Session.query(User).\ > >> options(FromCache('default', 'user')).\ > >> options(RelationshipCache('default', 'user_groups', > >> User.groups)).\ > >> get(user_id) > > >> Anyone ran into this problem? > > > -- > > 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 > > athttp://groups.google.com/group/sqlalchemy?hl=en. -- 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.
