Deletions in a many-to-many structure

Question

I just want to check really quickly. Say I have two entities in a data model: Catalog, and Product. They have a many-to-many relationship with each other, and both are require

Answer 1

I've implemented rgeorge's answer, and thought the exact code might be helpful to other people:

- (void)willSave
{
    [super willSave];

    if (self.isDeleted)
        return;

    if (self.products.count == 0)
        [self.managedObjectContext deleteObject:self];
}