Hi. I'm trying to save player generated entities (buildings, units, sectors), but I need those to have unique ID (preferably created by the platform), so the client only handles random strings. To achieve this, i created a runtime collection and add entities like so:

var dCollection = Spark.runtimeCollection("player_progress");
var json = Spark.data.VALUE;
var entry = {"playerId" : Spark.getPlayer().getPlayerId(), "data":json};
var success = dCollection.insert(entry);

When I want to retrieve an entity, I use:  

var dCollection = Spark.runtimeCollection("player_progress");
var docId = Spark.data.ID;
var doc = dCollection.findOne({"_id":{"$oid": docId}});
Spark.setScriptData("item", doc);

Is this the correct approach?

I am trying to modify an entry, with: 

var dCollection = Spark.runtimeCollection("player_progress");
var docId = Spark.data.ID;
var field = Spark.data.FIELD;
var doc = dCollection.findAndModify( <missing code to find doc with id and modify field>  );
dCollection.save(doc);

Could you please show an example of how to modify the doc with given docId (playerId is irrelevant here) and field. The field is a number and would increase by 1.

Thanks!

I was able to do it with:

var doc = dCollection.findOne({"_id":{"$oid": docId}});
doc.eData.ProductionPerMin = 2;
var success = dCollection.update({"_id":{"$oid": docId}}, doc);

Still not sure if it's a good approach. It would mean this collection would have a lot of documents with only amount of data in it. Is there a way to store this against the player, but to have a unique id for each entry?