Core Data simple relationship in code

Question

I am a cocoa newbie trying to create an iPhone app including Core Data.

My problem is this: I have a little app running now with a single entity called Playlist that I d

Answer 1

Petter,

There should be a method on the PlayList model object that is something like:

- (void) addSongObject:(Song *)value;

It is a dynamically generated method that will insert a Song value into the relationship for songs in PlayList. If you have not generated the PlayList model object since adding the Song relationship, that method will not be there. So, make sure you generate model classes for any changed entities.

The Song object that you pass to the addSongObject method should be created using the ManagedObjectContext like:

Song *song = (Song *)[NSEntityDescription insertNewObjectForEntityForName:@"Song" inManagedObjectContext:playlistListManagedObjectContext];

Jack