Query Parse Object based on empty relation

Question

I have a parse object that I need to query based on a PFRelation property. I need to query for all objects in which the relation is empty and all objects in which the relation is not empty. What's the best approach for this? I'm using the iOS SDK.

score -1 · Answer 1 · answered Aug 21 '15 at 12:15

-1

PFUser * currentUser = [PFUser currentUser];
PFRelation *relation = [currentUser relationForKey:@"habits"];
PFObject *object = [PFObject objectWithClassName:@"Habit"];
object[@"name"] = @"gym";

[object saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
       if (!error) {

            [relation addObject:object];
            [currentUser saveInBackground];

        }
    }];

answered Aug 21 '15 at 12:15

Kamalkumar.E

254
2
11

this doesn't answer the question – Julien Altieri Jun 21 '17 at 22:19
i tried with above sample it's worked for me.to object relation between two class in parse. (Note:Parse had stopped their service) – Kamalkumar.E Jun 22 '17 at 16:21
He is asking how to query a class based on the emptiness or not of a relation. Your sample code is about adding something to an object's relation. I still haven't found a good solution for this. – Julien Altieri Jun 23 '17 at 19:09

Query Parse Object based on empty relation

1 Answers1