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iOS

Posted by Tom Coomer
Tom Coomer
1,331 Points

Getting User's Username from Parse.com

I am trying to get the username of a PFUser. The code below works without this line:var username = nameId.username as String but when it is added the collection view does not show any results. Any ideas?

    var query = PFQuery(className:"Chat")
        //        query.whereKey("user", equalTo:currentUser)
        query.whereKey("rideId", equalTo:currentObjectId)
        query.orderByAscending("createdAt")

        query.findObjectsInBackgroundWithBlock {
            (objects: [AnyObject]!, error: NSError!) -> Void in
            if error == nil {
                // The find succeeded.
                NSLog("Successfully retrieved \(objects.count) scores.")
                // Do something with the found objects
                for object in objects {
                    NSLog("%@", object.objectId)

                    var testId = object.objectId

                    println(testId)

                    self.orderedIdArray.append(testId)

                    var message = object.objectForKey("message") as String
                    self.messageString = message
                    self.messageArray.append(self.messageString)
                    println(message)

                    var nameId = object.objectForKey("user") as PFUser
                    var username = nameId.username as String
                    self.nameString = username
                    self.namesArray.append(self.nameString)

                    self.collectionView?.reloadData()

                }

            } else {
                // Log details of the failure
                NSLog("Error: %@ %@", error, error.userInfo!)
            }

        }

2 Answers

Tom Coomer
Tom Coomer
1,331 Points

It is now working with this line:

query.includeKey("user")
Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points 
var nameId = object.objectForKey("user") as PFUser
var username = nameId.username as String

on your backend is the "user" field a pointer to the user object? or is it just the userID? if its the userID you need to run another query to get that userID.

var userQuery = PFUser.query()
userQuery.getObjectInBackgroundWithId(nameId) { 
  (object: PFObject!, error: NSError!) -> Void in
  if error == nil {
        let user: PFUser = object as? PFUser
       //user is a PFUSer
       var username = user.username as String
       self.nameString = username
       self.namesArray.append(self.nameString)


  } else {
    NSLog("%@", error)
  }
}
Tom Coomer
Tom Coomer
1,331 Points

It is a Pointer I believe. Should the code I am using work then?

Stone Preston
Stone Preston
42,016 Points

yes if it is a pointer your code should work. double check, print out nameId and see what it says. if it just prints out the id then its not a pointer to the user object

Tom Coomer
Tom Coomer
1,331 Points

When those lines of code are not included then the message is printed. When that code is added, it stops after the first message, before it gets to print the username. Also on the server it says Pointer<_User>

Stone Preston
Stone Preston
42,016 Points

when you say it stops does it crash? what do you mean it stops

Tom Coomer
Tom Coomer
1,331 Points

It does not crash, It just does not run any code after the line 

var username = nameId.username as String
Stone Preston
Stone Preston
42,016 Points

so if you write 

 var username = user.username as String
println("username: \(username")

it doesnt print anything out at all? thats very strange.

Tom Coomer
Tom Coomer
1,331 Points

Yes. This is the code:

                    var nameId = object.objectForKey("user") as PFUser

                    println("Name Id is:")
                    println(nameId)

                    var username = nameId.username as String
                    println("username: \(username)")

And it prints:

2014-12-02 17:47:52.882 GoRide[6976:1168365] 5xYKslv5Me
Object id is: 5xYKslv5Me
Message is: My Message
<PFUser:8Ef4GSbLqi:(null)> {
}

then nothing else. There are 8 objects that it should display.