> Core Data is giving me a validation error when I try to save a document > after making a simple change. > > I have an entity 'Scene' with a to-many relationship to an entity > 'Target'. The inverse relationship is also to-many. Both relationships > are optional and the delete rule for both sides is nullify. > > To repro, I delete all Scenes then try to save. It gives: > > "Dangling reference to an invalid object." = <null>; > NSAffectedObjectsErrorKey = ( > <BSScene: 0x2004ff940> (entity: Scene; id: 0x2004f32a0 <x-coredata:// > FCE3E0E3-F187-4C44-BFC3-60D7AF3E579F/Scene/p343> ; ... > > This error gives only 4 hits with Google. :( > > The problem is that some Targets still have relationships to some > Scenes! How can that happen? It seems like the delete rule is not > doing its job.
This error happens when the MOC for a destination object is nil, the object is in a relationship but marked deleted, or the object in a relationship has a temporary objectID but is not marked inserted. Using refreshObject:mergeChanges:NO on an object with pending changes can do some of that, as can assigning a deleted object to new relationships after delete propagation has run. - Ben _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
