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Advanced Node.js Development

You're reading from   Advanced Node.js Development Master Node.js by building real-world applications

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Product type Paperback
Published in Mar 2018
Publisher Packt
ISBN-13 9781788393935
Length 592 pages
Edition 1st Edition
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Author (1):
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Andrew Mead Andrew Mead
Author Profile Icon Andrew Mead
Andrew Mead
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Table of Contents (12) Chapters Close

Preface 1. Getting Set Up FREE CHAPTER 2. MongoDB, Mongoose, and REST APIs – Part 1 3. MongoDB, Mongoose, and REST APIs – Part 2 4. MongoDB, Mongoose, and REST APIs – Part 3 5. Real-Time Web Apps with Socket.io 6. Generating newMessage and newLocationMessage 7. Styling Our Chat Page as a Web App 8. The Join Page and Passing Room Data 9. ES7 classes 10. Async/Await Project Setup 11. Other Books You May Enjoy

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...

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