Re: Core Data Entity Relationship -valueForKeyPath: question
Re: Core Data Entity Relationship -valueForKeyPath: question
- Subject: Re: Core Data Entity Relationship -valueForKeyPath: question
- From: "Jamie Phelps" <email@hidden>
- Date: Mon, 30 Jun 2008 21:49:41 -0500
You're right. Someone off list pointed me in the right direction of
NSNumber's -isEqualToNumber: method. Sorry for the noise, everyone!
JP
On Mon, Jun 30, 2008 at 9:42 PM, Quincey Morris <email@hidden>
wrote:
>
> 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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Jamie Phelps
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(817) 673-0036
http://www.jamiephelps.com
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