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iOS Build a Self-Destructing Message iPhone App Relating Users in Parse.com Removing Friends by Tapping on a Table View Cell

Posted by German Espitia
German Espitia
4,578 Points

Creating a PFRelation and adding objects to it.

Pretty straight forward, my code is below but I keep getting an error for [relation addObject:object];.

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

[relation addObject:object];

[currentUser saveInBackground];

1 Answer

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

objects must be saved first before being added to a relation

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];

        }
    }];
German Espitia
German Espitia
4,578 Points

The docs over at Parse.com didn't help much. Not once under the relational data section do they mention saving an object.

but once again, thanks Stone. I appreciate your help.