Hi I'd like to use an associationproxy for a simple many-to-one relationship:
class Child(Base): __tablename__ = 'child' id = Column(Integer, primary_key=True) name = Column(Unicode) class Parent(Base): __tablename__ = 'parent' id = Column(Integer, primary_key=True) child_id = Column(Integer, ForeignKey('child.id') child_ = relationship(Child) child = association_proxy('child_', 'name', creator=) Now 'child' is a read-only, dictionary-like table. I never want to insert new rows in this table. So I actually pass the following "creator" to the association_proxy constructor: def creator(name): return Session.query(Child).filter_by(name=name).first() That does the job for "create". But I cannot find a solution for "update". On update I'd like to replace the current Child object in the Parent object by a new Child object read from the 'child' table. Using a specific setter (in a getset_factory) does not work for me, as the setter receives the Child object (and the value), not the Parent object – I'd need a ref to the Parent object to be able to change its Child object in child_. Maybe I'm doing it all wrong and using an associationproxy is not the way to go for that case. Thanks for any suggestion. -- Eric Lemoine Camptocamp France SAS Savoie Technolac, BP 352 73377 Le Bourget du Lac, Cedex Tel : 00 33 4 79 44 44 96 Mail : eric.lemo...@camptocamp.com http://www.camptocamp.com -- 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.