Firebase - how to get the key value in observeEventType = Value

Question

This is a follow up question to Firebase - proper way to structure the DB

I have the following DB structure:

\"artists\" : {
  \"-KKMkpA22PeoHtBAPyKm         


        

Answer 1

You can get the Keys with the help of Dictionary itself.

    Database.database().reference().child("artists").observe(.value, with: { (snapshot) in
        if snapshot.exists() {
            if let artistsDictionary = snapshot.value as? NSDictionary {
                for artists in artistsDictionary.keyEnumerator() {
                    if let artistsKey = artists as? String {
                        print(artistsKey) // Here you will get the keys.
                    }
                }
            }
        } else {
            print("no data")
        }
    }) { (error) in
        print(error)
    }

Answer 2

In if condition, you need to get allKeys to get "-KKMkpA22PeoHtBAPyKm" ...

    if snapshot.exists() {
        for a in (snapshot.value?.allKeys)!{
            print(a)
        }
    } else {
        print("we don't have that, add it to the DB now")
    }

Answer 3

Here's a solution.

let ref = self.myRootRef.childByAppendingPath("artists")

ref.queryOrderedByChild("name").queryEqualToValue("Skillet")
     .observeEventType(.Value, withBlock: { snapshot in

     if ( snapshot.value is NSNull ) {
          print("Skillet was not found")
     } else {
          for child in snapshot.children {   //in case there are several skillets
               let key = child.key as String
               print(key)
          }
     }
})