Save after push to a refrence model

saveAndPushIdAndSaveParent.js

var async = require('async');
global._clients = {};

var mongoose = require('mongoose');
global._mongoose = mongoose;

var conf = {
db: {
db: 'gendocx',
host: 'localhost',
port: 27017,
// optional, default: 27017
username: '',
// username, optional
password: '',
// password, optional
collection: 'mySessions' // optional, default: sessions
},
secret: '076ee61d63aa10a125ea872411e433b9'
};

var dbUrl = 'mongodb://';
dbUrl += conf.db.username + ':' + conf.db.password + '@';
dbUrl += conf.db.host + ':' + conf.db.port;
dbUrl += '/' + conf.db.db;
mongoose.connect(dbUrl);


Schema = mongoose.Schema



mongoose.connection.on('error', function(data) {
console.log('err', data)
});

mongoose.connection.on('open', function() {
console.log('MongoDB connected')
});



var ClientSchema = new Schema({
    email: String,
    name: String,
    nick: String,
    domains: [{ type: Schema.Types.ObjectId, ref: 'Domain' }]
});

var DomainSchema = new Schema({
    name: String
});

var clientTable = mongoose.model('client', ClientSchema);
var domainTable = mongoose.model('Domain', DomainSchema);

// var newClient = new clientTable({
// 	email: '[email protected]',
// 	name:'harpreet',
// 	nick:'har',
// 	domains:[]
// });
// newClient.save(function(err, result) {
// 	console.log(result)
// })

clientTable.findOne({
	name:'harpreet'
}, function(err, clientRes) {
	console.log(clientRes)
	var newDomain = new domainTable({
	name:'stack.com',
	});
	newDomain.save(function(err, domainRes) {
		console.log(domainRes)
		clientRes.domains.push(domainRes._id);
		clientRes.save(function(err, finalResult) {
			console.log('finalResult', finalResult)
		})
	})

})

output

{
  email: '[email protected]',
  name: 'harpreet',
  nick: 'har',
  _id: 53a7149ece059b4409a63fd7,
  __v: 0,
  domains: []
}
{ __v: 0, name: 'stack.com', _id: 53a71564..}

finalResult { email: '[email protected]',
  name: 'harpreet',
  nick: 'har',
  _id: 53a7149ece059b4409a63fd7,
  __v: 1,
  domains: [ 53a715645d0b76f4092acdee ]
}