Getting the key for a child node in JavaScript Firebase

Question

I am trying to get the key from a child nodes data.

$(document).on('click', '#enter', getName);

function getName() {

    name = $('#user').val().trim();
    database.ref('players/' + name).push({
        name: name
    })
}

database.ref('players/' + name).child(name).on("child_added",
    function(childSnapshot){

        var childKey = childSnapshot.key;
        var childData = childSnapshot.val;
        console.log('key', childKey)
        console.log('data', childData)

    }, function (errorObject) {

        console.log("The read failed: " + errorObject.code);
    })
})

In the snapshot function, when I console log the childKey, it shows the key is the name of the user, which is the path I created in the ref('players/' + name). But I need the key for the node that gets nested inside the name node. I get an error in my childSnapshot function saying that the .child(name) is an invalid path. Also says,

Paths must be non-empty strings and can't contain ".", "#", "$", "[", or "]"

Currently when I create data onto Firebase it looks like this:

-players
   -Johnson
     -KWH4mjWbOuptod_vV1o
        name: "ajks"

I need to get the key under johnson, that long string of letter and numbers so I can reference that specific node and add data, change data or update data such as the name.

Possible duplicate of [In Firebase when using push() How do I pull the unique ID](http://stackoverflow.com/questions/16637035/in-firebase-when-using-push-how-do-i-pull-the-unique-id) — cartant, Nov 11 '16 at 08:45

score 2 · Answer 1 · answered Jan 27 '17 at 17:01

Try this way

var fb_ref= firebase.database().ref('players/' + name)
fb_ref.push({
              name: name
})
fb_ref.on('child_added', function (data) {
                console.log(data.key);
            });

or

fb_ref.push({
              name: name
}).then(function(fb_ref){
   console.log(fb_ref.key);
})

Keep one thing in mind, if your using firebase version above 3.x means use "key", in case your version lesser than 3.x means use "key()" like this

Getting the key for a child node in JavaScript Firebase

1 Answers1