Book Image

Advanced Node.js Development

By : Andrew Mead
Book Image

Advanced Node.js Development

By: Andrew Mead

Overview of this book

Advanced Node.js Development is a practical, project-based book that provides you with all you need to progress as a Node.js developer. Node is a ubiquitous technology on the modern web, and an essential part of any web developer’s toolkit. If you're looking to create real-world Node applications, or you want to switch careers or launch a side-project to generate some extra income, then you're in the right place. This book was written around a single goal: turning you into a professional Node developer capable of developing, testing, and deploying real-world production applications. There's no better time to dive in. According to the 2018 Stack Overflow Survey, Node is in the top ten for back-end popularity and back-end salary. This book is built from the ground up around the latest version of Node.js (version 9.x.x). You'll be learning all the cutting-edge features available only in the latest software versions. This book delivers advanced skills that you need to become a professional Node developer. Along this journey you'll create your own API, you'll build a full real-time web app and create projects that apply the latest Async and Await technologies. Andrew Mead maps everything out for you in this book so that you can learn how to build powerful Node.js projects in a comprehensive, easy-to-follow package designed to get you up and running quickly.
Table of Contents (17 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Validators, Types, and Defaults


In this section, you're going to learn how to improve your Mongoose models. This is going to let you add things like validation. You can make certain properties be a requirement, and you can set up smart defaults. So, if something like completed is not provided, you can have a default value that gets set. All of this functionality is built into Mongoose; we just have to learn how to use it.

To illustrate why we'd want to set this stuff up, let's scroll to the bottom of our server file and remove all of the properties on the new Todo we created. Then, we're going to save the file and move into the Terminal, running the script. That's going to be node in the server directory, and the file is going to be called server.js:

node server/server.js

When we run it, we get our new Todo, but it only has the version and ID properties:

All of the properties we specified in the model, text, completed, and completedAt, are nowhere to be found. That's a pretty big problem. We...