CODEWITHSUNDEEP
iphoneiosnspredicate
Fogmeister
Fogmeister

Reputation: 77661

Multiple to-many NSPredicate

I have a model with a couple of to-many relationships.

System ->> Item ->> Code

I'm trying to write a predicate on a fetchRequest for System.

I only want to show Systems that have Items that have at least one Code.

I have tried a SUBQUERY but I just can't get it to work.

This is what I've tried...

[NSPredicate predicateWithFormat:@"(SUBQUERY(items, $x, $x.codes.@count != 0) != 0)"];

I've tried other various permutations of this but they all throw similar errors.

Could someone let me know what the correct predicate format is?

Upvotes: 0

Views: 119

Answers (1)

Martin R
Martin R

Reputation: 540065

I think you have to add another @count for the SUBQUERY:

[NSPredicate predicateWithFormat:@"SUBQUERY(items, $x, $x.codes.@count != 0).@count != 0"];

Upvotes: 0

Related Questions