Even building up an array of managedobjects and then passing that to
the set returned from mutableSetValueForKey results in extremely long
updates. For example, I just tried moving 1300 songs to a playlist and
while it took almost no time to fetch each song from the managed
context and buil
> for (song in songs)
> NSManagedObject *song = ... (Fetch some from proper context)
> song.playlist = destinationList
> end
You could always ask the playlist for its
-mutableSetValueForKey:@"songs" ... then call -addObjects: and pass in
your songs array.
--
I.S.
_
Given an array of NSManagedObjects, is there an efficient way to
batch update a relationship on each object? Iterating through the
array and setting the relationship using any of the available methods
is incredibly slow when doing this on thousands of objects.
As an example, assume
