On 17/11/2011, at 2:54 PM, David Avendasora wrote: > On Nov 17, 2011, at 7:48 AM, Paul Hoadley wrote: > >> On 17/11/2011, at 10:08 AM, David Avendasora wrote: >> >>> On Nov 10, 2011, at 5:34 AM, Paul Hoadley wrote: >>> >>>> Say I have two entities, User and Role, and a joining entity UserRole to >>>> create a many-to-many relationship between them. So I have a relationship >>>> 'userRoles' from User to UserRole (and a relationship 'userRoles' from >>>> Role back to UserRole). I flatten the relationship on User, so I also >>>> have a 'roles' relationship on that entity. >>> >>> Wait. "Also"?!? That's insane. That's two distinct relationships >>> representing the same DB information, and one is hiding a huge piece of the >>> action. You are just asking for trouble. >> >> User.userRoles is not a class property. All that's exposed is the flattened >> User.roles. > > Okay, then that should be alright then, and I think nullify is the proper > setting for the non-class "real" relationships.
(I think I've now officially confused everyone, and kind of regret starting this thread...) No, you want Cascade on the non-class "real" relationships (to remove the row in the join table), and Nullify on the flattened relationship—as Chuck noted, to remove the destination object from the flattened relationship. >> I don't _think_ I'm talking about anything particularly unusual here, just >> the standard result of creating a many-to-many relationship with Entity >> Modeler, with a join entity and "Flatten relationships" checked. > > Not unusual, just something that you really shouldn't even be thinking about. Point taken, though someone has to think about it at some point. I thought the default delete rule (Nullify) was wrong. Turns out I was incorrect. :-) -- Paul. http://logicsquad.net/ _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list (Webobjects-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
