Firebase transactions data

Question

I'm using firebase for a game. Working with transactions and I'm getting a "object has no method 'val'" error.

It's annoying that their docs only have currentvalue+1 examples and not more complex.

With the game each player has x number of mins to submit the score. Naturally some scores will be submitted at the same time.

here's my script

var myScore=15;
var scoreRef = new Firebase('https://site.firebaseIO.com/arcade/games/keys/'+key+'/bonsai/'+bonsaiGameID+'/');
scoreRef.transaction(function(snapshot) {
    var leaderScore=snapshot.val().score;
    var leaderID=snapshot.val().leaderID; 
    if(myscore>leaderScore){
        scoreRef.push({data}) 
})

So 1st get the current score, if my score is higher push.

Answer 1

A transaction is not passed snapshot, but rather the value itself. The value can be a primitive (boolean, string or number) but can also be an object. It is basically the result of snapshot.val() rather than the snapshot itself.