Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
5 (1)
Book Image

Accelerating Server-Side Development with Fastify

5 (1)
By: Manuel Spigolon, Maksim Sinik, Matteo Collina

Overview of this book

This book is a complete guide to server-side app development in Fastify, written by the core contributors of this highly performant plugin-based web framework. Throughout the book, you’ll discover how it fosters code reuse, thereby improving your time to market. Starting with an introduction to Fastify’s fundamental concepts, this guide will lead you through the development of a real-world project while providing in-depth explanations of advanced topics to prepare you to build highly maintainable and scalable backend applications. The book offers comprehensive guidance on how to design, develop, and deploy RESTful applications, including detailed instructions for building reusable components that can be leveraged across multiple projects. The book presents guidelines for creating efficient, reliable, and easy-to-maintain real-world applications. It also offers practical advice on best practices, design patterns, and how to avoid common pitfalls encountered by developers while building backend applications. By following these guidelines and recommendations, you’ll be able to confidently design, implement, deploy, and maintain an application written in Fastify, and develop plugins and APIs to contribute to the Fastify and open source communities.
Table of Contents (21 chapters)
Part 1:Fastify Basics
Part 2:Build a Real-World Project
Part 3:Advanced Topics

Customizing the validator compiler

Fastify exposes a lot of options to provide a flexible validation process and complete control of it. We are going to explore all the possible customizations one by one, so you will be a validator compiler guru by the end of this section! Let’s jump into this journey one step at a time!

Flow control

In the previous section, we mentioned the attachValidation route option – it’s time to look at an example (although you probably already know how to use it, thanks to the previous chapters):

app.get('/attach-validation', {
  attachValidation: true,
  schema: {
    headers: jsonSchemaHeaders
  handler: (request, reply) => {

Adding the flag into the route option will prevent a validation error from being thrown. Instead, the validation execution process will be interrupted...