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

Saving an instance


So far we have created an instance, and put some data to it, but it only exists in the application. Saving it to the database is a really simple operation.

Note

Your Mongoose connection must be open for this to work.

After we have created our newUser and given it some data, we save it in the following way:

newUser.save( function( err ){
  if(!err){
    console.log('User saved!');
  }
});

This .save method is an example of an instance method, because it operates directly on the instance, rather than the model. Note that the parameter it takes is a callback function to run when the save operation has been made to the database. As we saw back in Chapter 1, Introducing Mongoose to the Technology Stack, writing to a database is a blocking operation, but the .save method provides a non-blocking asynchronous way of doing this, allowing the Node process to carry on and deal with other requests.

This is a good thing for our application, but it means that any operations that you want...