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

Mongoose validation – the basics


In Mongoose, validation is set at the schema level. Remember how in our userSchema we have this for the email field:

  email: { type: String, unique: true }

The unique: true part is a type of validation that Mongoose passes directly through to MongoDB. The other types of validation we are about to look at are set in the same place, but are handled by Mongoose before it goes anywhere near the database; unless of course, you have a type of validation where you specifically choose to check against something in the database.

Default validators

Mongoose provides some common validators to get us started. We'll look at them in this chapter. Some of these are for specific SchemaTypes, which we'll get to know in a moment, but there is one that can be used on all SchemaTypes.

All SchemaTypes

There is one validator that can be used by any SchemaType, named required. This will return a validation error if no data is given to a data object with this property. It is super-easy...