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iOS

Posted by Stone Preston
Stone Preston
42,016 Points

PFRelation with PFFile objects

Im trying to create a relation that contains PFFile objects. Im getting an error when I try to do this the error is -[PFFile parseClassName]: unrecognized selector sent to instance 0x170479cc0'. I also got a warning that sending PFFile was incompatible with PFObject, though I thought PFFile inherited from PFObject. I tried casting my PFFile object to PFObject, but still get the same error. Any thoughts on this? Amit Bijlani

here is my code. the file objects have already been saved to parse before saving the newspot object

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

                            PFRelation *imageRelation = [newSpot relationforKey:@[Ben Jakuben](https://teamtreehouse.com/bendog24) "hasImages"];
                            [imageRelation addObject:file];

                            PFRelation *thumbnailRelation = [newSpot relationforKey:@"hasThumbnails"];
                            [thumbnailRelation addObject:(PFObject *)thumbnailFile];




                        } else {

                            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"An error occurred" message:@"Please try adding the spot again" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];

                            [alertView show];


                        }

3 Answers

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

figured it out

                    PFObject *photo = [PFObject objectWithClassName:@"Photo"];
                    photo[@"image"] = file;
                    photo[@"thumbnail"] = thumbnailFile;

                    [photo saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {

                        //photo was saved successfully
                        if (!error) {

                            //successful save of photo objext
                            //continue uploading the rest of the spot object

                            //create the photo relation
                            PFRelation *photoRelation = [newSpot relationforKey:@"hasPhotos"];
                            [photoRelation addObject:photo];
Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

tagging Ben Jakuben as well

Stone Preston
Stone Preston
42,016 Points

ahh. well I think im going to try just creating a new Photo object, add my files to that object, save it, then add a relation that contains that photo object instead of the files directly. I think that would work.