The rightExpression should be [NSExpression
expressionForConstantValue:deletedAlertIDs]. The collection passed to
expressionForAggregate: should itself contain expressions, according to the
docs. I'm not exactly sure what that's for, but expressionForConstantValue: is
definitely what you want here.
Daniel
On Nov 23, 2012, at 9:52 PM, Rick Mann wrote:
> I'm trying to set up an "IN" predicate like this:
>
> NSArray* deletedAlertIDs = @[ @198, @197 ];
> NSPredicate* pred =
> [NSComparisonPredicate predicateWithLeftExpression: [NSExpression
> expressionForKeyPath: @"keyShadow"]
> rightExpression: [NSExpression expressionForAggregate:
> deletedAlertIDs]
> modifier: NSDirectPredicateModifier
> type: NSInPredicateOperatorType
> options: 0];
> req.predicate = pred;
>
> But it doesn't work, even though NSLog() shows it as "keyShadow IN {198,
> 197}", which is the same as what I get when I use this code that works:
>
>
> req.predicate = [NSPredicate predicateWithFormat: @"keyShadow IN %@",
> deletedAlertIDs];
>
> Clearly something is different between the two that's not shown in the
> description.
>
> --
> Rick
>
>
>
>
> _______________________________________________
>
> Cocoa-dev mailing list ([email protected])
>
> 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:
> https://lists.apple.com/mailman/options/cocoa-dev/danhd123%40mac.com
>
> This email sent to [email protected]
_______________________________________________
Cocoa-dev mailing list ([email protected])
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:
https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to [email protected]
