The NSFetchedResultsController
is only designed to watch one entity at a time. Your setup, while it makes sense, it a bit beyond what the NSFetchedResultsController
is currently capable of watching on its own.
My recommendation would be to set up your own watcher. You can base it off the ZSContextWatcher I have set up on GitHub, or you can make it even more straightforward.
Basically, you want to watch for NSManagedObjectContextDidSaveNotification
postings and then reload your table when one fire that contains your department entity.
I would also recommend filing a rdar with Apple and asking for the NSFetchedResultsController
to be improved.