Parse.com Multiple Users accessing data - Swift - ios

Question

I am making a to do app using parse.com. I have got data which is set by a user and they should be able to assign that data to another user too. So the user sets a title, text and the name of the user they wish to assign it to. All of this is stored in the database and works well. When the same user logs in the data they set is displayed for him in the table view controller.
However the user they assigned to see the data does not display. So let me explain with code. The code underneath allows the user to see the data they set when they go to Table view screen. The code under is in the viewDidAppear function.
func fetchAllObjectsFromLocalDatastore() {
var query: PFQuery = PFQuery(className: "toDo")
query.fromLocalDatastore()
query.whereKey("username", equalTo: PFUser.currentUser().username)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if (error == nil) {
var temp: NSArray = objects as NSArray
self.toDoObjects = temp.mutableCopy() as NSMutableArray
self.tableView.reloadData()
}else {
println(error.userInfo)
}
}
With this, I have another function:
func fetchAllObjects() {
PFObject.unpinAllObjectsInBackgroundWithBlock(nil)
var query: PFQuery = PFQuery(className: "toDo")
query.whereKey("username", equalTo: PFUser.currentUser().username)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if (error == nil) {
PFObject.pinAllInBackground(objects, block: nil)
self.fetchAllObjectsFromLocalDatastore()
}else {
println(error.userInfo)
}
}
}
The user he wants to see that data to is assigned in the add new to do screen and that works. It even displays on the Parse.com database. But how can I query it or get it to show that data for the user who the data has been assigned to not just the user who set it.
So when (for example) UserOne sets data, it appears for him when he logs in and goes to table view, but even when he assigns to (for example) UserTwo and UserTwo logs in and goes to table view where the data is meant to be, I just do not know HOW TO DO??!
Please do help me or give me guidance, I am still searching on the solution to this, I feel like it is really simple but I cannot put my finger on it.
UPDATE *2
When the data is set, it is set with who the UserOne would like to give access to the data to.
So here is the saving process I guess:
#IBAction func saveAction(sender: UIBarButtonItem) {
self.object["username"] = PFUser.currentUser().username
self.object["title"] = self.titleField?.text
self.object["text"] = self.textView?.text
self.object["forUser"] = self.userToAssignTo?.text
self.object.saveEventually { (success, error) -> Void in
if (error == nil) {
}else{
println(error.userInfo)
}
}
So then I tried to query the forUser:
func fetchAllObjects() {
PFObject.unpinAllObjectsInBackgroundWithBlock(nil)
var query: PFQuery = PFQuery(className: "toDo")
query.whereKey("forUser", equalTo: PFUser.currentUser().username)
query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in
if (error == nil) {
PFObject.pinAllInBackground(objects, block: nil)
self.fetchAllObjectsFromLocalDatastore()
}else {
println(error.userInfo)
}
}
}
This still did not seem to work. I'm not sure what I'm doing now! Damn I just don't know how I can let another user see the data that one user has set.
UPDATE 3**
I found it! It was all about the viewDidAppear function, so here is the code:
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
if (PFUser.currentUser() == nil) {
var logInViewController = PFLogInViewController()
logInViewController.delegate = self
var signUpViewController = PFSignUpViewController()
signUpViewController.delegate = self
logInViewController.signUpController = signUpViewController
self.presentViewController(logInViewController, animated: true, completion: nil)
}else {
//self.fetchAllObjectsFromLocalDatastore()
//self.fetchAllObjects()
self.fetchAllObjectsFromLocalDatastore2()
self.fetchAllObjects2()
}
}
It is basically because the fetchAllObjects was kind of wiping it out for the "forUser" key. But now I need to figure out how to do it so the fetchAllObjects don't wipe each other off because it almost like a refresh button and then all the data is wiped off the screen.

Answer 1

I have been working on a similar issue however with push notifications from parse. I can provide code examples later today. There are a couple ways to approach. When the user creates a new to do you can set a custom object with the user they want to assign to and you can query based on the field. You can save the to do with saveinbackground with block. Another way is to use PFRelation. Watched a few courses on team tree house to review and see different techniques and they have one that is a self destructing messaging app that uses parse for functions much similar to what you want to do.