• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: CoreData "in" predicate
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: CoreData "in" predicate


  • Subject: Re: CoreData "in" predicate
  • From: Frederick Reimer <email@hidden>
  • Date: Sun, 2 May 2010 08:58:39 -0400

The manuals for this give the following example:

NSPredicate *inPredicate =
            [NSPredicate predicateWithFormat: @"attribute IN %@", aCollection];

It looks like you are missing the attribute...  If attribute can vary, you can use a %K and a NSString value representing the attribute name (it is not automatically enclosed in quotes as %@ values are).

HTH,

Fred
On May 2, 2010, at 8:27 AM, Rick Mann wrote:

> Hi.
>
> I have two entities: Mission and Favorite. Favorite has a single relation to Mission. I need to fetch all Mission objects that exist in Favorite. I'm using an NSFetchResultsController.
>
> I created an array with all the Mission objects found in the Favorite entity. Then I tried to create a predicate like this:
>
> 	NSPredicate* pred = [NSPredicate predicateWithFormat: @"in %@", favoriteMissions];
>
> and use that on a fetch of Mission objects. But it complains that it can't parse that format string.
>
> Clearly, this approach isn't going to work. I could store the Mission's key in the Favorite table instead, but that's less elegant. Might be the only way to go.
>
> Any suggestions?
>
> tia,
> Rick
>
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
>

_______________________________________________

Cocoa-dev mailing list (email@hidden)

Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com

Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden

  • Follow-Ups:
    • Re: CoreData "in" predicate
      • From: Rick Mann <email@hidden>
References: 
 >CoreData "in" predicate (From: Rick Mann <email@hidden>)

  • Prev by Date: Ticker Style Scrolling Text
  • Next by Date: Re: CoreData "in" predicate
  • Previous by thread: CoreData "in" predicate
  • Next by thread: Re: CoreData "in" predicate
  • Index(es):
    • Date
    • Thread