A common thing you'll have to do as a module developer is to intercept a given request and redirect it to another page, and more often than not, this will have to be dynamic, depending on the current user or other contextual info. Drupal 7 developers know very well that this has always been an easy task. Simply implement hook_init(), which gets called on each request and then use the famous drupal_goto() function. This, however, is no longer the case in Drupal 8. What we have to do now is subscribe to the kernel.request event (remember this from the preceding chapter?) and then change the response directly. However, before seeing an example of this, let's take a look at how we can perform a simpler redirect from within a Controller. You know, since we're on the subject.
Drupal 8 Module Development - Second Edition
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Drupal 8 Module Development - Second Edition
By:
Overview of this book
Drupal 8 comes with a release cycle that allows for new functionality to be added at a much faster pace. However, this also means code deprecations and changing architecture that you need to stay on top of. This book updates the first edition and includes the new functionality introduced in versions up to, and including 8.7.
The book will first introduce you to the Drupal 8 architecture and its subsystems before diving into creating your first module with basic functionality. You will work with the Drupal logging and mailing systems, learn how to output data using the theme layer and work with menus and links programmatically. Then, you will learn how to work with different kinds of data storages, create custom entities, field types and leverage the Database API for lower level database queries.
You will further see how to introduce JavaScript into your module, work with the various file systems and ensure the code you write works on multilingual sites. Finally, you will learn how to programmatically work with Views, write automated tests for your functionality and also write secure code in general.
By the end, you will have learned how to develop your own custom module that can provide complex business solutions. And who knows, maybe you’ll even contribute it back to the Drupal community.
Foreword by Dries Buytaert, founder of Drupal.
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Current Title:
Drupal 8 Module Development - Second Edition
Table of Contents (20 chapters)
Preface
Free Chapter
Developing for Drupal 8
Creating Your First Module
Logging and Mailing
Theming
Menus and Menu Links
Data Modeling and Storage
Your Own Custom Entity and Plugin Types
The Database API
Custom Fields
Access Control
Caching
JavaScript and the Ajax API
Internationalization and Languages
Batches, Queues, and Cron
Views
Working with Files and Images
Automated Testing
Drupal 8 Security
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