On Oct 22, 2009, at 16:26, Sean McBride wrote: > Hi all, > > 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. > > I've confirmed that each Scene receives prepareForDeletion. None of the > Scenes are finalized, they are all strongly referenced by the moc's > _deletedObjects ivar. > > Any advice on how to debug this? > > (I can repro this with 2 customer-provided documents, but I've not been > able to create a document with this problem myself. Happens on 10.5.8 > and 10.6.1; my app is garbage collected.) >
Does the object with the ID <x-coredata://FCE3E0E3-F187-4C44-BFC3-60D7AF3E579F/Scene/p343> exist in the affected store? What happens when you call existingObjectWithID:error:? Do you know what version of the OS the bad documents were created on? A lot changed in the relationship handling area in 10.6 (for the better, really and truly ;-), so knowing whether your customers created them on 10.5.x or 10.6.x would help narrow down the possibilities. +Melissa _______________________________________________ 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
