Immediately I notice that the attributes `father`/`mother` have no relationship to the `Parent` object. I think specifying backref/back_populates should solve your issue: http://docs.sqlalchemy.org/en/rel_1_0/orm/backref.html
Also, FYI You can use `expire` on just the relationships (http://docs.sqlalchemy.org/en/rel_1_0/orm/session_api.html#sqlalchemy.orm.session.Session.expire) session.expire(father, ['childs',]) -- 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. For more options, visit https://groups.google.com/d/optout.
