> > I don't see anything in the documentation for the fetch sort descriptors > that says they have to specify a Core Data property, rather than a custom or > derived property, although perhaps that is the problem.
"The SQL store, on the other hand, compiles the predicate and sort descriptors to SQL and evaluates the result in the database itself. This is done primarily for performance, but it means that evaluation happens in a non-Cocoa environment, and so sort descriptors (or predicates) that rely on Cocoa cannot work." [1] [1] http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdPersistentStores.html _______________________________________________ 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
