Can't load my current user's posts from Firebase - Swift - swift

Question

I want to load my current user's posts from my Firebase Database.
This is my database's architecture:
I have already successfully loaded all the posts into a home view but when I tried to duplicate and use the same method here with the necessary changes and using the uid for the current user's posts, it's not showing anything... Have run out of ideas as to what the problem might be, could use some help.
Here's a screenshot from the ProfileUserPosts swift file:
//VARS
var postsuser = [ProfileUserPosts]()
#objc func observeUserPosts() {
let uid = Auth.auth().currentUser?.uid
let postsRef = Database.database().reference().child("posts").child("author")
postsRef.queryOrdered(byChild: "userid").queryEqual(toValue: uid!).observe(.value) { (snapshot) in
var tempPost = [ProfileUserPosts]()
for child in snapshot.children {
if let childSnapshot = child as? DataSnapshot {
let dict = childSnapshot.value as? [String: Any]
//Post Picture
let photoUrl = dict!["photoUrl"] as? String
let url = URL(string: photoUrl!)
//Info Post
let comments = dict!["comments"] as? String
let city = dict!["city"] as? String
let municipality = dict!["municipality"] as? String
let breed = dict!["breed"] as? String
let phoneuser = dict!["phone"] as? String
let postType = dict!["postType"] as? String
let petType = dict!["petType"] as? String
let gender = dict!["gender"] as? String
let timestampadoption = dict!["timestamp"] as? Double
let date = Date(timeIntervalSince1970: timestampadoption!/1000)
let post = ProfileUserPosts(breed: breed!, phone: phoneuser!, photoUrl: url!, city: city!, municipality: municipality!, petType: petType!, gender: gender!, timestamp: date, postType: postType!, comments: comments!)
tempPost.insert(post, at: 0)
}
DispatchQueue.main.async {
self.postsuser = tempPost
self.postsCollectionView.reloadData()
self.refresher.endRefreshing()
}
}
}
}
Here's where I'm loading the CollectionView with the numberOfItemsInSection and cellForItem
extension ProfileViewController: UICollectionViewDataSource,UICollectionViewDelegate {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return postsuser.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell: PostsCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "postsCell", for: indexPath) as! PostsCollectionViewCell
cell.set(post: postsuser[indexPath.row])
return cell
}
}

Answer 1

Well, my guess - based on your database structure - is that you're accessing an invalid path.
When you've referenced Database.database().reference().child("posts").child("author"), you're saying that posts have a direct child to author and that's not true, they've a direct child of a post id, which then fetching the respective post, you can get the author, so in this case, you would've to iterate through all the posts.
So, to fetch all the posts:
let postsRef = Database.database().reference().child("posts")
then you would have an Object (very important - this is not an array) of posts with ID's as keys, then you would iterate through them and fetch the respective author you want. I won't get into details of your implementation, but just to clarify what I'm saying:
let specificPostAuthor = postsRef.child("LOj1UZZgUnKa28xVtht").child("author")
would return the respective post author.