Ok, so I've been looking into getting it to work when the child record doesn't exist. I haven't had much luck.
I wrote a stub mapper extension for translate_row and populate_instance, but it doesn't seem to be called when it goes to fetch the information for the child row. mapper(Parent, parents, polymorphic.....) mapper(Child, children, extension=MyExtension(def translate_row, def populate_instance)) query(Parent) my translate_row called my populate_instance called mapper.py:_get_poly_select_loader, the first inline post_execute is called to fetch the data: row = selectcontext.session.connection(self).execute(statement, params).fetchone() self.populate_instance(selectcontext, instance, row, isnew=False, instancekey=identitykey, ispostselect=True) Shouldn't translate_row be called before then? In the working case (child exists), neither of my extension methods are called, too. It makes sense that they would only be called once per result, but in this case a single result is actually 2 records fetch separately. --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
