Wrong assumption; you would actually use "SELF" in a format string, as it is a reserved word. So @"SELF IN %@"
I think... Fred Reimer, CCIE 23812 CISSP 107125 mailto:frei...@freimer.org On May 2, 2010, at 4:32 PM, Frederick Reimer wrote: > Unfortunately, there is nothing for the NSPredicate class to go on to assume > what object you are talking about. predicateWithFormat is a class > method/selector/function. What object is it supposed to assume you mean if > one is not supplied? > > Dan Rowley sent me an email saying you may be able to use "self." So, I > assume this means: > > NSPredicate *pred = [NSPredicate predicateWithFormat: @"%K in %@", self, > favoriteMissions]; > > HTH, > > On May 2, 2010, at 9:03 AM, Rick Mann wrote: > >> I saw that, I had hoped that by not specifying an attribute, it would mean >> the object itself, not an attribute on the object. >> >> >> On May 2, 2010, at 05:58:39, Frederick Reimer wrote: >> >>> 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 (Cocoa-dev@lists.apple.com) >>>> >>>> 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: >>>> http://lists.apple.com/mailman/options/cocoa-dev/freimer%40freimer.org >>>> >>>> This email sent to frei...@freimer.org >>>> >>> >> >> > > Fred Reimer, CCIE 23812 CISSP 107125 > mailto:frei...@freimer.org > > > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
