Parse Server Swift Logic for grabbing all items contained in array - swift

Question

I am using parse server with Swift. I am trying to get all matches that where the key "username" is contained in commentUserArray. Comment userArray displays 3 names ["username","username", "username2"].
The query grabs only two values as opposed to three as this looks up only for those two usernames "username" and "username1". However, I need all 3 instances of this. Please help.
var commentImgUrlArray: [NSString] = []
func getPics(_ completionHandler: #escaping () -> Void) {
let query = PFQuery(className: "_User")
query.whereKey("username", containedIn: commentUserArray)
query.findObjectsInBackground(block: { (objects: [PFObject]?, error: Error?) in
if let objects = objects {
for object in objects {
if error == nil {
let imageFile = object["profilePic"] as? PFFileObject
let imageFileString = imageFile?.url as! String
if let url = URL(string: imageFileString) {
let data = try? Data(contentsOf: url)
if let imageData = data {
self.commentImgUrlArray.append(imageFileString as NSString)
print(self.commentImgUrlArray)
}
}
}
}
completionHandler()
}
})
}

Answer 1

So after some trial and error, I have come across the solution.
Delete the original query.contained in as that overrides the rest of the formula.
Ideally, I want to run one query. Not however many on in commentuserarray. As a result, the for in loop should be placed inside the query.find -->
need to grab object for that specific user. Therefore, let pfuser = object["username"] as String
reverse the array to get the proper order --
func getPics(_ completionHandler: #escaping () -> Void) {
let query = PFQuery(className: "_User")
query.findObjectsInBackground(block: { (objects: [PFObject]?, error:
Error?) in
if let objects = objects {
for object in objects {
if error == nil {
for user in self.commentUserArray {
let pfuser = object["username"] as! String
if pfuser == user {
let imageFile = object["profilePic"] as? PFFileObject
let imageFileString = imageFile?.url as! String
if let url = URL(string: imageFileString) {
let data = try? Data(contentsOf: url)
if let imageData = data {
self.commentImgUrlArray.append(imageFileString as
NSString)
print(self.commentImgUrlArray)
}
}
}
}
}
}
self.commentImgUrlArray.reverse()
completionHandler()
}
})
}