Clash Royale CLAN TAG

How to get values inside nested keys in Firebase on Swift

I'm trying to get values inside two nested keys in Firebase.

:

I need to put all the value of name inside an array. Here is my code where I'm accessing just the node "user". I was thinking that I could use "queryOrderedByKey" one after another, but in that case xCode crashes and says something like multiple quires aren't allowed.

Database.database().reference().child("user").queryOrderedByKey().observe(.childAdded) { (snapshot) in

if snapshot.value != nil {

let result = snapshot.value as! [String : AnyObject]

if let name = result["name"] as? String {
self.myArray.append(name)
}

DispatchQueue.main.async(execute: {
self.tableView.reloadData()
})

}
}


And this is what I'm getting when printing the result.

2 Answers
2

Here is the answer

Database.database().reference().child("user").observe(.childAdded) { (snapshot) in

if let dictinoary = snapshot.value as? [String: Any] {
if let myFinalStep = dictinoary["GeneralInformation"] as? [String: Any] {
print(myFinalStep["name"])

}
}
}


Tigran's answer is very good but here's an alternative. This code iterates over each child node within 'user' node and looks into a deep path to get the name. Note this leaves a childAdded observer to the user node so if any additional nodes are added, this will fire again.

let usersRef = self.ref.child("user")
usersRef.observe(.childAdded, with: { snapshot in
if let name = snapshot.childSnapshot(forPath: "GeneralInformation")
.childSnapshot(forPath: "name").value as? String {
print(name)
}
})


If you want to read the names in once and not leave an observer, here's an alternative

let usersRef = self.ref.child("user")
usersRef.observeSingleEvent(of: .value, with: { snapshot in
for child in snapshot.children {
let snap = child as! DataSnapshot
if let name = snap.childSnapshot(forPath: "GeneralInformation")
.childSnapshot(forPath: "name").value as? String {
print(name)
}
}
})


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