Storing and retrieving JavaScript objects in/from MongoDB

Question

I am currently playing around with node.js and MongoDB using the node-mongo-native driver.

I tested a bit around using the Mongo console storing and retrieving JS o

Answer 1

I just recently realized, that it actually is possible to change an objects prototype in V8/node. While this is not in the standard it is possible in various browsers and especially in V8/node!

function User(username, email) {
    this.username = username;
    this.email = email;
}

User.prototype.sendMail = function (subject, text) {
    mailer.send(this.email, subject, text);
};

var o = {username: 'LoadeFromMongoDB', email: 'nomail@nomail.no'};
o.__proto__ = User.prototype;
o.sendMail('Hello, MongoDB User!', 'You where loaded from MongoDB, but inherit from User nevertheless! Congratulations!');

This is used all over various modules and plugins - even core modules make use of this technique, allthough it is not ECMAScript standard. So I guess it is safe to use within node.js.

Answer 2

I'm not sure I'm following you question exactly... but fwiw one thing came to mind: Have you checked out the Mongoose ORM? (http://mongoosejs.com/)

It gives you a lot of options when it comes to defining models and methods. In particular "Virtuals" might be of interest (http://mongoosejs.com/docs/virtuals.html).

Anyway, hope it helps some!