Core Data Relationships cause save error after delete

Question

This question is probably a long shot. I can\'t figure out the errors I\'m getting on my core data project when I save after I delete an entity.

I have two main enti

Answer 1

Do you happen to implement some of the accessor to the relationship yourself? I once had a code like

-(NSSet*)articles
{
       re-calculates properties....
       return [self primitiveValueForKey:@"articles"];
}

in a subclass of NSManagedObject and had a save error. What happened was that, when this object is deleted from the ManagedObjectContext, the CoreData calls the accessor "articles" to deal with the delete propagation. This re-calculation of articles occurred during the delete propagation, which re-surrected the nullified "articles" in my case.