On Aug 15, 2018, at 6:15 PM, Demitri Muna <cocoa-...@demitri.com> wrote: > > I'm building an interface that contains an NSPredicateEditor (think iTunes > smart playlists), and I want to save the predicate in a Core Data store. What > is the recommended way to do this? Serialize the NSPredicate object and save > it as a blob? Break apart the predicate into one or more NSExpressions (left > hand value, operator, right hand value) and reconstruct the predicate? I can > think of several possibilities, but am wondering what is the path of least > resistance (and, I suppose, most binding-friendly!).
Serializing the predicate (using NSKeyedArchiver) seems obviously the right way to go. Any other approach is just reinventing serializing it in a worse way. You can create a custom value transformer (subclass of NSValueTransformer) to automatically archive and unarchive. Use that on your binding. Regards, Ken _______________________________________________ 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
