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

Summary

You didn't think you were ever going to see this heading did you? This chapter has been very long and highly theoretical. We haven't built anything fun and the only code we saw was to exemplify most of the things we talked about. It was a difficult chapter as it covered many complex aspects of data storage and handling. But trust me, these things are important to know and this chapter can serve both as a starting point to dig deeper into the code and a reference to get back to when unsure of certain aspects.

We saw what the main options for storing data in Drupal are. Ranging from the State API all the way to entities, you have a host of alternatives. After covering the simpler ways, such as the State API, the private and shared tempstores and the UserData API, we dove a bit more into the configuration system, which is a very important one to understand. There, we saw what kinds of configuration types we have, how to work with simple configuration, how it&apos...