Question

This may be a silly question, but until now all of my NSPredicate had some sort of a key given to them:

@"SELF.typeRelationship.categoryType != %d";

Now I need to create a predicate that would pull all objects from the core data that have a value assigned to them. Any value would do.

Will my predicate look like:

@"SELF.typeRelationship.categoryType != 0";
@"SELF.typeRelationship.categoryType != nil";//if an object property?

, or is there some better format that I should use to check if a property has an object assigned to it?

Answer 1

Do this if categoryType is a string,

NSPredicate *predicateName = [NSPredicate predicateWithFormat:@"SELF.typeRelationship.categoryType.length > 0"];