Book Image

Accelerating Server-Side Development with Fastify

By : Manuel Spigolon, Maksim Sinik, Matteo Collina
Book Image

Accelerating Server-Side Development with Fastify

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

Managing the validator compiler

Fastify offers you the possibility to customize the validator compiler in two different manners:

  • Configuring the default Ajv validator compiler
  • Implementing a brand-new validator compiler, such as a new JSON Schema compiler module

These options give you total control over the validation process and the ability to react to every situation you may face, such as adopting a new validator compiler module or managing how the Ajv package processes the input data.

Configuring the default Ajv validator compiler

In the Understanding the Ajv configuration section, we saw the default Ajv settings and a link to its documentation to explore them all. If you find some useful options you would like to apply, you can set them during the Fastify instance instantiation:

const app = fastify({
  ajv: {
    customOptions: {
      coerceTypes: 'array',