Filtering data snapshot Swift Firebase - swift

Question

I'm trying to return data from the database which I've done successfully. The problem is I don't want all data to be featured, but only the ones with the current UID which is stored in the JSON tree.
Here is my JSON tree, there is only one current UID but there will be many.
user_posts-
LDLc60j71FBvJGeYn5i
description: "Write here"
photoUrl: "https://firebasestorage.googleapis.com/v0/b/blo..."
uid: "zQRxvM3cwzQMewUtVamk8JQrEFJ3"
Here is my current code returning all data from database folder:
var posts2 = [user_posts]()
func loadPosts(){
Database.database().reference().child("user_posts").observe(.childAdded) {(snapshot: DataSnapshot) in
if let dict = snapshot.value as? [String: Any] {
let descriptionText = dict["description"] as! String
let photoUrlString = dict["photoUrl"] as! String
let post = user_posts(descriptionText: descriptionText, photoUrlString: photoUrlString)
self.posts2.append(post)
self.myPageTableView.reloadData()
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.hideKeyboardWhenTappedAround()
myPageTableView.dataSource = self
myPageTableView.delegate = self
loadPosts()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return posts2.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier:"myPageCell", for: indexPath)
as! myPageTableViewCell
cell.myPageDescription?.text = posts2[indexPath.row].description
let photoUrl = posts2[indexPath.row].photoUrl
let url = URL(string: photoUrl)
cell.myPageImage.sd_setImage(with: url, placeholderImage: nil)
return cell
}
}

Answer 1

To load only the posts for a specific user, you'll want to use a Firebase query:
let uid = Auth.auth().currentUser.uid
let posts = Database.database().reference().child("user_posts")
let query = posts.queryOrdered(byChild: "").queryEqual(toValue: uid)
query.observe(.childAdded) {(snapshot: DataSnapshot) in
...
Also see the Firebase documentation on ordering and filtering data.