On Jul 27, 2010, at 1:23 PM, Zippy P wrote: > Hi all, > > I have the following: > > class Device(Base): > ... > source_id = Column(BigInteger, primary_key=True) > ... > > class EventQuery(Query): > def custommethod(): > ... > > class Event(Base): > __tablename__ = 'events' > query = Session.query.property(query_cls = EventQuery) > ... > device_source_id = Column(BigInteger, ForeignKey("Device.source_id")) > device = relationship(Device, backref=backref('events', lazy='dynamic')) > ... > > Now, Device.events returns a query of type AppenderQuery, which is fine for > some built-in methods like count() and all(). What I really need is for this > to be a query of type EventQuery, so I can call Device.events.custommethod(). > > 1) Is it possible to coerce AppenderQuery into a different Query class? > 2) If not, is it appropriate to create a custom property on Device that will > return an EventQuery containing the equivalent query, or is there a more > proper way to do it?
relationship() and backref() accept query_class for this purpose. > > Thanks, > > S. > > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalch...@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. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@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.