Use of unresolved identifier 'Snapshot' in Swift5 when I'm trying to use firebase

Question

I have imported the following: import FirebaseAuth import Firebase import FirebaseFirestore import FirebaseDatabase

I am trying use this line of code let currentUserDoc = snapshot?.documents.first(where: { ($0["uid"] as? String) == UserId }) but xcode says "Use of unresolved identifier 'snapshot'. What does that mean and how do I fix it so it disappears.

Answer 1

You need to use getDocuments():

var userName = db.collection("users").getDocuments() { (snapshot, error) in
        if let error = error {
            print("Error getting documents: \(error)")
    } else {
        //do something
            let currentUserDoc = snapshot?.documents.first(where: { ($0["uid"] as? String) == UserId })

            }