Swift + Parse.com : how to fetch user relation using a join table - ios

Question

I have an app like instagram where i have to make relationship between users.
For that i decided to use the join table method.
It'' s just a table named "Activity" where i created rows "fromUser", "toUser" and a row for the activity type "type" which in this case is set to "followingAction".
Here how i set up the table :
var activity = PFObject(className:"Activity")
let currentUser = PFUser.currentUser()
let follow : String = "followingAction"
activity.setObject(currentUser, forKey: "fromUser")
activity.setObject(user, forKey: "toUser") // user is a another PFUser in my app
activity.setObject(follow, forKey: "type")
activity.saveEventually()
Ok, now i want to fetch all users that i m currently following (currentUser) and display them in a tableView
Following the doc https://parse.com/docs/relations_guide#manytomany-jointables
i made this but it only give me an array of users which only contain the user objectId, i can't have the email, name which are set up in the regular User table :
func loadUser () {
followingUserList.removeAllObjects()
let findUserObjectId = PFQuery(className: "Activity")
findUserObjectId.whereKey("fromUser", equalTo: userPassed)
findUserObjectId.whereKey("type", equalTo: "followingAction")
findUserObjectId.findObjectsInBackgroundWithBlock { (objects:[AnyObject]!, error:NSError!) -> Void in
if error == nil {
// The find succeeded.
println("succesfully loaded the fromUser in Activity class")
// Do something with the found objects
for object in objects {
let user : PFUser = object["toUser"] as PFUser
self.followingUserList.addObject(user)
println("User added to following user list : \(user)")
println("followingUserlist = \(self.followingUserList)")
self.tableView.reloadData()
} } else {
// Log details of the failure
println("error loadind user ")
println(error)
}
}
}
if i print the followingUserList which is the array where i put the fetched users, here is what i have :
followingUserlist = (
"<PFUser: 0x7d9b93c0, objectId: DQJihBpW5E, localId: (null)> {\n}"
)
When i make a regular query (PFUser.query()) for the regular User table, i have more detail :
ex :
<PFUser: 0x7db5af80, objectId: niwftRrB5x, localId: (null)> {
backgroundImage = "<PFFile: 0x7db5f080>";
email = "kiki#kiki.com";
emailVerified = 0;
profileImage = "<PFFile: 0x7db62910>";
username = kiki;
}
Here we can see i have the complete PFUser with it email, username etc etc.
Because the "fromRow" in my "Activity" table is a pointer to my regular User table, why the fetched result in my loadUser() method isn't complete ?

Answer 1

Ok i finally found the solution, i just used the getObjectInBackgroundWithId method like this :
func loadUser () {
followingUserList.removeAllObjects()
let findUserObjectId = PFQuery(className: "Activity")
findUserObjectId.whereKey("fromUser", equalTo: userPassed)
findUserObjectId.whereKey("type", equalTo: "followingAction")
findUserObjectId.findObjectsInBackgroundWithBlock { (objects:[AnyObject]!, error:NSError!) -> Void in
if error == nil {
// The find succeeded.
println("succesfully loaded the fromUser in Activity class")
// Do something with the found objects
for object in objects {
let user : PFUser = object["toUser"] as PFUser
let queryUsers = PFUser.query()
queryUsers.getObjectInBackgroundWithId(user.objectId, block: { (userGet :PFObject!,error : NSError!) -> Void in
self.followingUserList.addObject(userGet)
self.tableView.reloadData()
})
} } else {
// Log details of the failure
println("error loadind user ")
println(error)
}
}
}