Book Image

Drupal 9 Module Development - Third Edition

By : Daniel Sipos
Book Image

Drupal 9 Module Development - Third Edition

By: Daniel Sipos

Overview of this book

With its latest release, Drupal 9, the popular open source CMS platform has been updated with new functionalities for building complex Drupal apps with ease. This third edition of the Drupal Module Development guide covers these new Drupal features, helping you to stay on top of code deprecations and the changing architecture with every release. The book starts by introducing you to the Drupal 9 architecture and its subsystems before showing you how to create your first module with basic functionality. You’ll explore the Drupal logging and mailing systems, learn how to output data using the theme layer, and work with menus and links programmatically. Once you’ve understood the different kinds of data storage, this Drupal guide will demonstrate how to create custom entities and field types and leverage the Database API for lower-level database queries. You’ll also learn how to introduce JavaScript into your module, work with various file systems, and ensure that your code works on multilingual sites. Finally, you’ll work with Views, create automated tests for your functionality, and write secure code. By the end of the book, you’ll have learned how to develop custom modules that can provide solutions to complex business problems, and who knows, maybe you’ll even contribute to the Drupal community!
Table of Contents (20 chapters)
3
Chapter 3: Logging and Mailing

Chapter 5: Menus and Menu Links

Navigation is an important part of any web application. The ability to create menus and links easily in order to connect pages together is a core aspect of any content management system. Drupal is fully equipped with both the site-building capabilities and developer API to easily build and manipulate menus and links.

In this chapter, we will discuss menus and menu links from a Drupal 9 module developer perspective. In doing so, we will touch upon a few key aspects:

  • The general architecture of the menu system in Drupal
  • Manipulating and rendering menus
  • Defining various types of menu links

By the end of this chapter, you should be able to understand what menus and menu links are, how to use them in your code and how to define menu links in your module. So let's get started.