How To check if an attribute exists at runtime on a NSManagedObject subclass

Question

How to check if an attribute exists for a particular entity at runtime. I will implement a property named dateAddStamp, but not all entities have this attribute. This class will serve as a base for other entity's classes... So I want to check at runtime If I can call [self setPrimitiveValue:xxx forKey:xxx] or not... Thanks.

Answer 1

in swift

 let hasFoo =  myObject.entity.propertiesByName.keys.contains("foo")

Answer 2

BOOL hasFoo = [[myObject.entity propertiesByName] objectForKey:@"foo"] != nil;