Re: attribute is an array?
Re: attribute is an array?
- Subject: Re: attribute is an array?
- From: Roland King <email@hidden>
- Date: Tue, 21 Jun 2011 19:58:49 +0800
On 21-Jun-2011, at 7:48 PM, Amy Heavey wrote:
> Hi,
>
> I'm trying to acccess a decimal attribute of an entity, and I can't work out why it's not working. I'm using the code below;
>
> NSString *price = [[product valueForKey:@"kitFee"] stringValue];
>
> and I get this error:
>
> 2011-06-21 12:43:34.666 ishop[30901:10b] *** -[NSCFArray stringValue]: unrecognized selector sent to instance 0xe74f030
>
> kitFee is a decimal attribute, and I can successfully get string attributes with this code, NSString *productName = [product valueForKey:@"kitName"];
>
> Does the error message mean that it's getting an array for kitFee when it should be a value?
>
> I've cleaned and rebuilt, and it's sticking at this line, but I just can't see my error?
>
> I'd appreciate any help,
>
> Many Thanks
>
> Amy
NSString *productName = [ product valueForKey:@"kitName" ];
just assigns blindly whatever valueForKey: returns to an productName, which is really just an id which the compiler expects to be an NSString (ie the compiler will warn you if you call non-NSString methods on it). However that line alone doesn't prove that it's a NSString, could still be a NSArray.
What are you doing with productName which proves it is in fact a string? Are you logging it, do you see '[]' in the log message which might be a hint it's an array of strings?
What's product? Is that an array? valueForKey: on an array returns an array of answers. _______________________________________________
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