[baseten-users] to-many relationship set observing

[Tuukka Norri]

Hi!

Réjean Lamy kirjoitti 4.5.2009 kello 14.40:
> Is it possible to observe add/remove to a  to-many relationship's  
> set ?
Yes, just call BXDatabaseObject's - 
addObserver:forKeyPath:options:context: with the relationship's name  
as the key. Here's a small example (Department is the relationship's  
name):

// Add the observer somewhere.
[object addObserver: self forKeyPath: @"Department" options: 0  
context: kObservingContext];


- (void) observeValueForKeyPath: (NSString *) keyPath ofObject: (id)  
object change: (NSDictionary *) change context: (void *) context
{
     if (kObservingContext == context)
     {
         // Handle the change.
         ...
     }
     else
     {
         [super observeValueForKeyPath: keyPath ofObject: object  
change: change context: context];
     }
}

-- 
Best regards,
Tuukka Norri
MK&C