Dear list, I have an app which presents folders and files in a tree structure. I'm using an NSTreeController and core data to keep track of the relationships between the files and folders. The ProjectItem entity has a 'children' relationship which is to-many with the same entity and a 'parent' relationship which is to-one with the same entity. The 'children' relationship has a cascade delete rule; the parent one has a nullify rule. I use a tree-controller and then an outline view to display. Pretty normal stuff so far.
I received a bug report from a user saying that when he deletes a folder which contains one or more files then he can't save the document (this is an NSPersistentDocument app, by the way). The error in the logs is CoreData could not fulfil a fault for <.... Folder/ ...> I struggled to reproduce this until I did some testing on 10.6.8. There I can reproduce the problem easily. So, this problem seems to be restricted to 10.6.8 - on 10.8 it doesn't happen. I've tried various things to handle the deletion of objects differently, including the things discussed here: http://www.cocoabuilder.com/archive/cocoa/309154-core-data-undo-delete-cannot-fulfill-fault.html and here http://developer.apple.com/library/mac/#documentation/cocoa/conceptual/CoreData/Articles/cdTroubleshooting.html but so far, nothing helps. I delete objects using the -remove: method of NSTreeController. Has anybody else had this problem and/or can they point out some places to begin looking for the problem? I'm confused why I should have the problem on SL but not on ML - is the core data implementation somehow more robust to some programming error in my app on ML? Any clues, ideas, advice, would be gratefully received. Best wishes, Martin _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
