What's -mutableSetValueForKey: returning, actually? Is that something special?
- by dontWatchMyProfile
From the docs:
You usually access to-many
relationships using
mutableSetValueForKey:, which returns
a proxy object that both mutates the
relationship and sends appropriate
key-value observing notifications for
you.
So this returns an "intelligent" NSMutableSet which automatically lets the context delete objects when they get deleted from the set, and reverse? Is that a proxy object?