Firebase Retrieving Data in Swift

Question

I'm trying to retrieve specific data from just the currently logged in user. My data in my database looks like this:

For example, I want to just grab the full_name and save it in a variable userName. Below is what I'm using to grab my data

ref.queryOrderedByChild("full_name").queryEqualToValue("userIdentifier").observeSingleEventOfType(.ChildAdded, withBlock: { snapshot in
            print(snapshot.value)
            // let userName = snapshot.value["full_name"] as! String
        })

Unfortunately, this is what my console prints.

I would appreciate any help :) Thank you!

Answer 1

It gives you that warning message indexOn because you are doing a query.

you should define the keys you will be indexing on via the .indexOn rule in your Security and Firebase Rules. While you are allowed to create these queries ad-hoc on the client, you will see greatly improved performance when using .indexOn

As you know the name you are looking for you can directly go to that node, without a query.

    let ref:FIRDatabaseReference! // your ref ie. root.child("users").child("[email protected]")

    // only need to fetch once so use single event

    ref.observeSingleEventOfType(.Value, withBlock: { snapshot in

        if !snapshot.exists() { return }

        //print(snapshot)

        if let userName = snapshot.value["full_name"] as? String {
            print(userName)
        }
        if let email = snapshot.value["email"] as? String {
            print(email)
        }

        // can also use
        // snapshot.childSnapshotForPath("full_name").value as! String
    })