Book Image

Mongoose for Application Development

By : Simon Holmes
Book Image

Mongoose for Application Development

By: Simon Holmes

Overview of this book

Mongoose is all about putting the data model where it should be: in your application. You can control everything from within your application in JavaScript, eliminating the need to work with the database or a separate management system. Mongoose for Application Development is a practical, hands-on guide that takes you from installing the technology stack through the steps of developing a web application. It covers the key features of Mongoose and how to use them to rapidly develop a Node.js and MongoDB application. This book introduces the full technology stack of Node.js, MongoDB, Express, and Mongoose. It will take you through the process of building an application on this stack with a focus on how Mongoose makes the process quicker and easier. You will see how Mongoose removes a layer of complexity when dealing with MongoDB whilst giving you more control over your data from your application. You will learn how to define schemas and models for your data in JavaScript. Using these schemas and models, you will learn how to build the cornerstone of any web application that will include CRUD operations (creating, reading, updating, and deleting data). If you want to learn how to build applications quickly and efficiently using Node.js, then Mongoose and this book are ideal for you. Using practical examples throughout, Mongoose for Application Development not only teaches you about the concepts of Mongoose, but walks through how to use them to build a real-life application.
Table of Contents (18 chapters)
Mongoose for Application Development
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating an instance


Now that Chapter 4, Interacting with Data – An Introduction has taken care of the housekeeping, it's time to get going and do stuff with data. Theory first, then action!

To do anything meaningful at all, we will have to create an instance. This could be done by retrieving an object from a database, but let's start by creating a new empty instance. We do this by using the new ModelName expression. As our model is called User, to create a new instance we invoke the new User expression.

var newUser = new User();

Adding data to the instance

When creating an instance, you will generally want to add some data to it. The default way of adding data is to pass it to the model constructor as a JavaScript object. For example:

var newUser = new User({
  name: 'Simon Holmes',
  email: '[email protected]',
  lastLogin : Date.now()
});

Although you can also add data to the instance after it has been created, as shown in the following:

var newUser = new User();
newUser.name = 'Simon...