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Re: setPrimitiveValue:forKey: and to-many relationships
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Re: setPrimitiveValue:forKey: and to-many relationships


  • Subject: Re: setPrimitiveValue:forKey: and to-many relationships
  • From: "Sean McBride" <email@hidden>
  • Date: Wed, 24 Sep 2008 20:30:13 -0400
  • Organization: Rogue Research

On 9/24/08 5:01 PM, Quincey Morris said:

>> - (void)setChildren:(NSSet *)value_
>> {
>>  [self willChangeValueForKey:@"children"
>>    withSetMutation:NSKeyValueSetSetMutation
>>    usingObjects:value_];
>>  [[self primitiveChildren] setSet:value];
>>  [self didChangeValueForKey:@"children"
>>    withSetMutation:NSKeyValueSetSetMutation
>>    usingObjects:value_];
>> }
>
>This is more direct than either of my suggestions. However, my guess
>is that [[self primitiveChildren] setSet:value] does not maintain the
>inverse relationship, if you have one.

You're suspicion may be correct, but considering how this doc implements
addEmployee: I'm not so sure:

<http://developer.apple.com/documentation/Cocoa/Conceptual/CoreData/
Articles/cdAccessorMethods.html#//apple_ref/doc/uid/TP40002154-SW6>

Surely their example would not screw up inverse relationships, since
they also recommend one always have inverses...

--
____________________________________________________________
Sean McBride, B. Eng                 email@hidden
Rogue Research                        www.rogue-research.com
Mac Software Developer              Montréal, Québec, Canada


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  • Follow-Ups:
    • Re: setPrimitiveValue:forKey: and to-many relationships
      • From: Quincey Morris <email@hidden>
References: 
 >setPrimitiveValue:forKey: and to-many relationships (From: "Sean McBride" <email@hidden>)
 >Re: setPrimitiveValue:forKey: and to-many relationships (From: Quincey Morris <email@hidden>)
 >Re: setPrimitiveValue:forKey: and to-many relationships (From: "Sean McBride" <email@hidden>)
 >Re: setPrimitiveValue:forKey: and to-many relationships (From: Quincey Morris <email@hidden>)

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