On May 26, 2010, at 7:39 AM, Graham Cox wrote: > I have a property 'categories' of an object that returns a list (an array) of > objects, which in turn have a property 'name'. > > Can I set up a NSPredicate that can match a string against any name in this > list? How? > > In IB I set the left hand side to 'categories.name' but I get the error that > "Can't do a substring operation with something that isn't a string", which on > reflection makes sense. > > I could add a property that does return a single string by combining all the > names into a comma delimited list, but I was hoping there might be a way to > define such a predicate without resorting to that (and also such an approach > loses the ability to correctly match 'begins with', 'ends with' and so on).
Not enough info: are you using Core Data, or a simple modeled relationship? I assume the issue is about traversing a relationship--otherwise the solution is trivial... Keary Suska Esoteritech, Inc. "Demystifying technology for your home or business" _______________________________________________ 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
