Question

I have a NSArrayController subclass which sets an instance variable of a newly inserted object and prevents the user to remove it if this variable is zero.

I’d like to do this inside an entity subclass. Setting the variable is possible in the awakeFromInsert method. Is there a way to prevent the deletion, a sort of:

if (self.testVariable == 0) return;   ?

I didn’t find it, but maybe I missed something.

Answer 1

Implement this in your NSManagedObject:

- (BOOL)validateForDelete:(NSError **)error