Book Image

Mastering Drupal 8

By : Sean Montague, Chaz Chumley, William Hurley
Book Image

Mastering Drupal 8

By: Sean Montague, Chaz Chumley, William Hurley

Overview of this book

Drupal is an open source content management system trusted by governments and organizations around the globe to run their websites. It brings with it extensive content authoring tools, reliable performance, and a proven track record of security. The community of more than 1,000,000 developers, designers, editors, and others have developed and maintained a wealth of modules, themes, and other add-ons to help you build a dynamic web experience. Drupal 8 is the latest release of the Drupal built on the Symfony2 framework. This is the largest change to the Drupal project in its history. The entire API of Drupal has been rebuilt using Symfony and everything from the administrative UI to themes to custom module development has been affected. This book will cover everything you need to plan and build a complete website using Drupal 8. It will provide a clear and concise walkthrough of the more than 200 new features and improvements introduced in Drupal core. In this book, you will learn advanced site building techniques, create and modify themes using Twig, create custom modules using the new Drupal API, explore the new REST and Multilingual functionality, import, and export Configuration, and learn how to migrate from earlier versions of Drupal.
Table of Contents (25 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Author
About the Reviewer
Customer Feedback
www.PacktPub.com
Preface

Enabling core debugging


There are a number of steps you can take just within Drupal 8 that will help you diagnose problems in your site. If you have Drupal Console installed, you can enable many of these modules by running drupal site:mode dev. Many of the debugging settings are controlled in the /sites/default/services.yml file.

If there isn't one already, you can copy the starting /sites/default/default.services.yml file to the services.yml file to start with.

Disabling caching

The first step is to start looking at how your code is running to ensure that caching is off. Otherwise, you may find yourself wondering why your errors appear only intermittently. You might want to start off by disabling both the dynamic page cache and render cache. If you have not done it already, you should enable the settings.local.php file by finding and uncommenting the line in the default /sites/default/settings.php file that has the following:

if (file_exists(__DIR__ . '/settings.local.php')) 
{ 
      include...