How do I check if a firebase database value exists?

Question

I\'m using the Realtime Database with Google\'s Firebase, and I\'m trying to check if a child exists.

My database is structured as the following

- /          


        

Answer 1

While the answer of @ismael33 works, it downloads all the rooms to check if room1 exists.

The following code accomplishes the same, but then only downloads rooms/room1 to do so:

ref = FIRDatabase.database().reference()

ref.child("rooms/room1").observeSingleEvent(of: .value, with: { (snapshot) in
    if snapshot.exists(){
        print("true rooms exist")
    }else{
        print("false room doesn't exist")
    }
})