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'use strict';const mongoose = require('../../lib');const Schema = mongoose.Schema;
console.log('Running mongoose version %s', mongoose.version);
/** * Console schema */
const consoleSchema = Schema({  name: String,  manufacturer: String,  released: Date});const Console = mongoose.model('Console', consoleSchema);
/** * Game schema */
const gameSchema = Schema({  name: String,  developer: String,  released: Date,  consoles: [{    type: Schema.Types.ObjectId,    ref: 'Console'  }]});const Game = mongoose.model('Game', gameSchema);
/** * Connect to the console database on localhost with * the default port (27017) */
mongoose.connect('mongodb://localhost/console', function(err) {  // if we failed to connect, abort  if (err) throw err;
  // we connected ok  createData();});
/** * Data generation */
function createData() {  Console.create(    {      name: 'Nintendo 64',      manufacturer: 'Nintendo',      released: 'September 29, 1996'    },    function(err, nintendo64) {      if (err) return done(err);
      Game.create({        name: 'Legend of Zelda: Ocarina of Time',        developer: 'Nintendo',        released: new Date('November 21, 1998'),        consoles: [nintendo64]      },      function(err) {        if (err) return done(err);        example();      });    }  );}
/** * Population */
function example() {  Game    .findOne({ name: /^Legend of Zelda/ })    .populate('consoles')    .exec(function(err, ocinara) {      if (err) return done(err);
      console.log(        '"%s" was released for the %s on %s',        ocinara.name,        ocinara.consoles[0].name,        ocinara.released.toLocaleDateString()      );
      done();    });}
function done(err) {  if (err) console.error(err);  Console.remove(function() {    Game.remove(function() {      mongoose.disconnect();    });  });}