CoreData: How to sort NSManagedObject by its primary key?

Question

I have one subclass of NSManagedObject like following and stored some instances by NSManagedObjectContext.

@interface SomeModelObject : NSManagedObject  
  @prop         


        

Answer 1

Use a sort descriptor with self as the sort key (instead of id). The underlying SQL will have ORDER BY t0.Z_PK.

Warning: as mentioned by vastopa below this is undocumented and crashes in iOS 10, and there is also a non-null probability that this breaks in a future version of iOS, so use at your own risk.