On Mon, 4 Mar 2013 22:17:44 -0800, Jerry Krinock said: >This is easy to do with a mapping model, migration policy and migration >manager. In your NSMigrationManager subclass implementation, implement >an override something like this… > >- (BOOL)createDestinationInstancesForSourceInstance: >(NSManagedObject*)oldInstance
Thanks Jerry, I've been playing with this today and it looks promising. I remember looking at it before but being scared off by the comment in the docs "If you override this method and do not invoke super, you must invoke NSMigrationManager’s associateSourceInstance:withDestinationInstance:forEntityMapping: to associate the source and destination instances as required" which I took to mean that I *had to* create a destination instance. (Passing nil for 'withDestinationInstance:' goes poof.) I take it you are using your technique successfully in practice? Thanks, -- ____________________________________________________________ Sean McBride, B. Eng s...@rogue-research.com Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada _______________________________________________ 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
