virtualPopulate.js

const assert = require('assert');
const mongoose = require('mongoose');
mongoose.set('debug', true);

const GITHUB_ISSUE = `1234`;
const connectionString = `mongodb://localhost:27017/${ GITHUB_ISSUE }`;
const {
    Schema,
    SchemaTypes
} = mongoose;

run().then(() => console.log('done')).catch(error => console.error(error.stack));

async function run() {
    await mongoose.connect(connectionString);
    await mongoose.connection.dropDatabase();

	const gameSchema = new mongoose.Schema({
		gameTitle: String,
		gameDescription: String,
	}, {
		timestamps: true,
		toObject: { virtuals: true },
		toJSON: { virtuals: true }
	});

	const gameStatusSchema = new mongoose.Schema({
		gameID: { type: mongoose.Schema.Types.ObjectId, ref: "Game"},
		gameStatus: Number
	}, {
		timestamps: true,
		toObject: { virtuals: true },
		toJSON: { virtuals: true }
	});

	gameSchema.virtual("gameStatus", {
		ref: "GameStatus",
		localField: "_id",
		foreignField: "gameID",
		justOne: true
	});

    let Game = mongoose.model('Game', gameSchema)
    let GameStatus = mongoose.model('GameStatus', gameStatusSchema)

	await Game.create({_id: "5c473a872721eb7327377fa2", gameTitle: 'Game1', gameDescription: "GameDescription" });

    await GameStatus.create([{ gameID: "5c473a872721eb7327377fa2", gameStatus: 10 }]);

    const games = await Game.find({})
      .sort([['updatedAt', 'descending']])
      .populate("gameStatus")

    console.log('GAMES', games);
}