How can I test facebooks friends tagging

Question

I want my app to tag friend within a video-post. (Posting a video without the tags is working fine)

The account I'm using, has been added to the list of testers for my app. So I should be able to do this call without any permissions.

But the response is still: "error: (#3) Application does not have the capability to make this API call."

To get the "Taggable Friends" permission, I need upload a build of my app to fb. But I can't implement this feature without testing it by myself first.

How can I solve this chicken-and-egg problem?

My code looks like this (iOS - Objc):

NSDictionary *params = @{
                         @"title": @"some title",
                         @"description": @"some desctiption",
                         @"tags": _friendId
                         };
SLRequest *uploadRequest = [SLRequest requestForServiceType:SLServiceTypeFacebook
                                              requestMethod:SLRequestMethodPOST
                                                        URL:videourl
                                                 parameters:params];

Answer 1

I have found the solution. You can't set the tag whithin the upload request (I still don't know why). But you can tag a user in the video after you uploaded the video.

When the upload succeeded, you get a videoId:

NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData
                                                                 options:NSJSONReadingMutableContainers
                                                                   error:&error];

            _currentVideoId = json[@"id"];

With this id you can make a second request:

ACAccountCredential *fbCredential = [_facebookAccount credential];
NSString *accessToken = [fbCredential oauthToken];
NSString *urlStr = [NSString stringWithFormat: @"https://graph-video.facebook.com/%@/tags?access_token=%@&tag_uid=%@", _currentVideoId, accessToken, userId];

SLRequest *request = [SLRequest requestForServiceType:SLServiceTypeFacebook
                                        requestMethod:SLRequestMethodPOST
                                                  URL:[NSURL URLWithString: urlStr]
                                           parameters: @{}];

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void) {
    [request performRequestWithHandler:^(NSData *responseData, NSHTTPURLResponse *urlResponse, NSError *error) {

        NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
        //Do something
    }];
});

To make the second request, you need the permission for @"user_videos". If you want to tag more users, you need to make this request a few times. Maybe it's also possible with one request, but I didn't figuered out how to do it yet.