I think you misunderstand what -validateForInsert: and friends are for. They use "insert" here in the sense of inserting into the persistent store.
So -validateForInsert: is called the first time the object is added to the store (calling -[NSManagedObjectContext save:] ). From then on, -validateForUpdate: will be called at each save that will modify the object. And finally, -validateForDelete: if removing from the store. On 20 Dec 2009, at 08:19, Gerriet M. Denkmann wrote: > I have a document based Core Data app. > > MyDocument.nib contains an NSTableView bound to an NSArrayController. > There also are "+" and "-" buttons, which send "add:" resp. "remove:" to the > array controller. > > SomeEntity.m (subclass of NSManagedObject) implements validateForInsert:, > validateForUpdate: and validateForDelete: - none of which are ever called. > Why? > > What I try to accomplish: > SomeEntity has a property called "uniqueKey" and this is (no big surprise) > meant to be unique. > > When the "UniqueKey" column in my table view gets edited, > validateUniqueKey:error: gets called, I check the new value for uniqueness > and all is fine. > > But hitting the "+" button several times inserts several objects with the > same key (Default Value). > > What should I do? How to make validateForInsert: get called? 10.6.2. > > > Kind regards, > > Gerriet. > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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/cocoadev%40mikeabdullah.net > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
