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Setting up relationship via drag and drop
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Setting up relationship via drag and drop


  • Subject: Setting up relationship via drag and drop
  • From: Jokke Heikkila <email@hidden>
  • Date: Mon, 17 Sep 2007 13:19:58 +0300

I'm cooking up a CD app in which I want to set up 'work order - customer' relationship with drag and drop. I've tried and looked over and over again but I always end up with an error

'2007-09-17 08:54:19.853 Verstas[20297] *** -[customerMO copyWithZone:]: selector not recognized [self = 0x34cba0]'

On the actual d&d operation I seem to have everything ok (according to the log statements) up to the point where the actual relationship is setup with [[selectedObjects objectAtIndex:i] setValue:object forKey:@"customer"];. As the error hints to me there's something funky in my customerMO class but I really can't figure what to exactly look for. Though I have subclassed the customerMO this error happened even though the class was instance of NSManagedObject. Below is the drag and drop operation which leads to the above error.

-(BOOL)performDragOperation:(id <NSDraggingInfo>)sender
{
NSPasteboard *pb = [sender draggingPasteboard];
NSString *newURI = [pb stringForType:NSStringPboardType];
NSLog(@"newURI: %@", newURI);
NSArray *selectedObjects = [orderArray selectedObjects];
unsigned int i, count = [selectedObjects count];

//we need the managed object context and coordinator
NSManagedObjectContext *context = [orderArray managedObjectContext];
NSPersistentStoreCoordinator *coordinator = [context persistentStoreCoordinator];

for (i=0 ; i < count ; i++) {
NSLog(@"setting new relationship with orderNo %@", [[selectedObjects objectAtIndex:i] valueForKey:@"workOrderId"]);
NSURL *url = [NSURL URLWithString:newURI];
NSManagedObjectID *objectID = [coordinator managedObjectIDForURIRepresentation:url];
id object = [context objectWithID:objectID];
NSLog(@"On the other end of relation is %@", [object valueForKey:@"lastName"]);
[[selectedObjects objectAtIndex:i] setValue:object forKey:@"customer"];
}
return YES;
}




TIA
-jokke h.





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