zhao/imports/api/collections/Players.js

import { Mongo } from "meteor/mongo";

let Players = new Mongo.Collection("players");

// TODO: there's probably a better way to do this
try {
  let collection = Players.rawCollection();
  collection.ensureIndex({ name: 1, roomId: 1, }, { unique: true });
} catch (e) {

}

export default Players;