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Re: CoreData: Getting the last object of a relation

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Re: CoreData: Getting the last object of a relation

Subject: Re: CoreData: Getting the last object of a relation
From: George Orthwein <email@hidden>
Date: Mon, 19 Jun 2006 02:31:02 -0400

1. [self valueForKeyPath:@"transactions.@lastObject"] -> doesn't work, because CoreData doesn't know "@lastObject".


Does anything know "@lastObject"? ;)

@ denotes a collection operator, so it would have to be listed on this page: http://developer.apple.com/documentation/Cocoa/Conceptual/ KeyValueCoding/Concepts/ArrayOperators.html

I think you'll probably need to add an additional attribute in the model. Either a lastInserted that you can set for the last inserted (and clear the previous) or you could number the inserts with an ID and you'll know the last inserted by the highest ID.

Also, if this can (or should) be moved to the controller layer then there are probably other options....

Hope that helps,
George
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