Re: Question about Core Data Inverse Relationships
Bennett Smith <[email protected]>
| Newsgroups | gmane.comp.macosx.devel |
|---|---|
| Message-ID | <[email protected]> |
Well, I tried to attach the diagram, but guess the mailing list strips it out. The jist of the diagram was that I have the following entities: User name currentAttributes (to-many relationship with Attribute) oldAttributes (to-many relationship with Attribute) Attribute dateRecorded name value user (relationship with User) The problem I'm having is with setting up the inverse relationship in the Attribute entity. I would to specify an inverse relationship for both currentAttributes and oldAttributes, but can't see how to do this. Many thanks, and sorry for the confusion about posting the diagram. Cheers -- Bennett On Sep 19, 2009, at 9:14 PM, Bennett Smith wrote: > Forgot to attach the diagram: > > > > On Sep 19, 2009, at 9:09 PM, Bennett Smith wrote: > >> Hello >> >> I am stuck on a problem that I just can't figure out. I am very >> new to Core Data so it might just be that I am going about this >> wrong. I want to setup a model for something like this: >> >> >> The currentAttributes and oldAttributes relationships in User are >> configured as "to-many relationships." My problem is in figuring >> out how to set an inverse relationship in the Attribute class. It >> seems like I cannot have an inverse relationship that points back >> to User for all Attribute entities in this case. (At least I can't >> figure out how to do it in Xcode.) >> >> The purpose for this model is to allow me to track a set of >> attributes associated with a user and to keep track of any changes >> in the attribute values over time. A change is defined as replacing >> the value associated with the attribute or deleting an attribute. I >> am open to other suggestions on how to achieve this goal using Core >> Data. >> >> Thanks >> >> -- Bennett >> _______________________________________________ >> MacOSX-dev mailing list >> [email protected] >> http://www.omnigroup.com/mailman/listinfo/macosx-dev > > _______________________________________________ > MacOSX-dev mailing list > [email protected] > http://www.omnigroup.com/mailman/listinfo/macosx-dev _______________________________________________ MacOSX-dev mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-dev