Re: Sorting a to-many relationship property
Re: Sorting a to-many relationship property
- Subject: Re: Sorting a to-many relationship property
- From: Keary Suska <email@hidden>
- Date: Thu, 17 Jul 2008 08:56:23 -0600
- Thread-topic: Sorting a to-many relationship property
7/16/08 6:37 PM, also sprach email@hidden:
> I have a couple entities related by a to-many relationship. Entity Foo
> can have 0..N of Entity Bar. I have a relationship defined on Foo
> named "bars". In my code, I build a comma-delimited string of Bars by
> iterating over the NSArray* returned by Foo.bars.
>
> But they come back in whatever order Core Data has for them. I'd
> really like for all requests for Foo.bars to come back sorted by a
> property of Bar. Is this possible? Or must I either create a new
> property that sorts them, or just sort them after I get them?
If you are finding that multiple, separate methods are requiring a sorted
array, then you probably want a built-in solution, if you don't have a
controller somewhere in the mix that can do this for you.
Any customization will involve subclassing NSManagedObject and overriding
the accessor or adding a method. I recommend the latter (adding), as
overriding the accessor would make it rather inefficient, and could effect
performance.
HTH,
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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