NSManagedObject's hasChanges is true while changedValues is empty

Question

I am trying to observe individual NSManagedObject changes on NSManagedObjectContextWillSaveNotification:

- (void)managedObjectContextWi         


        

Answer 1

According to doc, hasChanges will return YES if the receiver has been inserted, has been deleted, or has unsaved changes, otherwise NO.

In your case, you can check isInserted, isUpdated, isDeleted flag to find what happened to your managed object. changedValues only show the properties that have been changed since last fetching or saving the receiver.