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Re: Core Data Entity Relationship -valueForKeyPath: question
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Re: Core Data Entity Relationship -valueForKeyPath: question


  • Subject: Re: Core Data Entity Relationship -valueForKeyPath: question
  • From: Quincey Morris <email@hidden>
  • Date: Mon, 30 Jun 2008 19:42:36 -0700


On Jun 30, 2008, at 19:01, Jamie Phelps wrote:

I have a Core Data entity Item with a relationship "transaction." (It's actually a to-many relationship. I'll adjust the key when I migrate my Core Data model.) My question is about KVC. Can anyone help me understand why the following code always returns YES? I know for a fact that some of my Item objects should return NO for this.

-(BOOL)sold{
   return ([self valueForKeyPath:@"transaction.@count"] > 0);
}

It's not a KVC issue. You called a method that returns a pointer, then you compared the pointer to 0 (nil). That's not what you meant to do.



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