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Re: Fun (or not) with NSArrayControllers and CoreData.
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Re: Fun (or not) with NSArrayControllers and CoreData.


  • Subject: Re: Fun (or not) with NSArrayControllers and CoreData.
  • From: Quincey Morris <email@hidden>
  • Date: Fri, 31 Jul 2009 15:41:25 -0700

On Jul 31, 2009, at 15:11, Daniel DeCovnick wrote:

That worked! The result was wrong, but making the rootFolder relationship into rootFolders and making it to-many, changing getRootFolder to -(NSArray *)allContainingFolders, and sending everything in that the addAllDescendantsJobsObject: message worked perfectly.

Good news. :)

Still, it's slightly disconcerting that setting the property doesn't set the inverse relationship. How are you supposed to change it later?

I believe it *was* setting the inverse correctly, just not KVO- compliantly. That is, your data model was correct, but the user interface was out-of-date.


On a mostly unrelated note, is the only way to suppress the "no '- addJobsObject:'/'-addAllDescendantsJobsObject:' method found" warnings to create the Folder custom subclass and paste the Core Data method declarations in? That approach seems like overkill since I have nothing to customize in it.

I forgot, you can't use @dynamic because these aren't properties. What you can do is put the method declarations in a category of your subclass, and just not implement the category. See Xcodes's Design --> Data Model --> Copy Obj-C 2.0 Method Declarations to Clipboard as a way of avoiding re-inventing this for yourself. (But delete any #ifdef'd stuff it gives you -- that's only if you're actually re- implementing the methods.)



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  • Follow-Ups:
    • The mystery of the missing inverse relationship (was: Re: Fun (or not) with NSArrayControllers and CoreData.)
      • From: Daniel DeCovnick <email@hidden>
References: 
 >Fun (or not) with NSArrayControllers and CoreData. (From: Daniel DeCovnick <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Quincey Morris <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Daniel DeCovnick <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Quincey Morris <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Daniel DeCovnick <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Quincey Morris <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Daniel DeCovnick <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Quincey Morris <email@hidden>)
 >Re: Fun (or not) with NSArrayControllers and CoreData. (From: Daniel DeCovnick <email@hidden>)

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