Above you see a player from my player collection. I am making an event called updateWorld with a bunch of attributes : worldNum, ore, distanceTraveled, highscore as numbers ...and rocketParts as JSON. 

In the cloudcode I then take the params to construct the fields in the player's document as you can see above, like so:

CloudCode:

var world = "world";

var num = Spark.data.worldNumber;

var worldNumString = world.concat(num); //constructs the world number key

var distanceTraveled = Spark.data.distanceTraveled; 

var ore = Spark.data.ore; 

var unlocked = Spark.data.unlocked; 

var timesPlayed = Spark.data.timesPlayed; 

var highScore = Spark.data.highScore; 

var rocketParts = Spark.data.rocketParts; 

Spark.getPlayer().setScriptData(worldNumString,{

 "distanceTraveled":distanceTraveled, "ore": ore, "unlocked":unlocked, "timesPlayed":timesPlayed, "highScore":highScore,      "rocketParts":rocketParts});

What needs to happen next:  

I need to now have the cloudcode first check the player collection and add the values from there, with the values coming in from the game.

So I tried adding this to the cloud code:

var gsOre = Spark.getPlayer().getScriptData("ore"); // Get the amount  of ore that is already in the field

var ore = Spark.data.ore;  // Get the amount of ore coming in from game

var totalOre = gsOre + ore; // add it up

Problem: gsOre is null. 

Can someone help me see what I need to do to get the value from my document so that I can add it and replace the new value?

Thank you,

Maria

Yes! Thank you Pádraig! 

Still learning the syntax :)