CoreData: Find minimum of calculated property

Question

Say I have a CoreData entity \"Point\" with two properties x and y (both NSNumber).

How would a NSPredicate need to look like to let me find the closest Point to say a,b

Answer 1

Sorry, but doing arithmetic in an NSPredicate isn't supported. Only comparison operators can be used. And the news gets worse. You can't use a transient property in an NSFetchRequest. Only persistent properties can be used. If you really need this level of control in fetching your objects, Core Data may not be able to accommodate you.