Book Image

Drupal 10 Development Cookbook - Third Edition

By : Matt Glaman, Kevin Quillen
Book Image

Drupal 10 Development Cookbook - Third Edition

By: Matt Glaman, Kevin Quillen

Overview of this book

This new and improved third edition cookbook is packed with the latest Drupal 10 features such as a new, flexible default frontend theme - Olivero, and improved administrative experience with a new theme - Claro. This comprehensive recipe book provides updated content on the WYSIWYG (What You See Is What You Get) editing experience, improved core code performance, and code cleanup. Drupal 10 Development Cookbook begins by helping you create and manage a Drupal site. Next, you’ll get acquainted with configuring the content structure and editing content. You’ll also get to grips with all new updates of this edition, such as creating custom pages, accessing and working with entities, running and writing tests with Drupal, migrating external data into Drupal, and turning Drupal into an API platform. As you advance, you’ll learn how to customize Drupal’s features with out-of-the-box modules, contribute extensions, and write custom code to extend Drupal. By the end of this book, you’ll be able to create and manage Drupal sites, customize them to your requirements, and build custom code to deliver your projects.

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Table of Contents (17 chapters)
Preface
Preface
What this book covers
What you need for this book
Who this book is for
Sections
Download the color images
Download the example code files
Conventions used
Get in touch
Share Your Thoughts
Download a free PDF copy of this book
1
Chapter 1: Up and Running with Drupal
Chapter 1: Up and Running with Drupal
Technical requirements
Creating a Drupal site
Running your Drupal site locally
Using the Drush command-line tool
Adding and managing module and theme extensions
Managing your Drupal code with version control
Successfully deploying your Drupal site
Free Chapter
2
Chapter 2: Content Building Experience
Chapter 2: Content Building Experience
Configuring the WYSIWYG editor
Creating an editorial workflow with content moderation
Creating a custom content type with custom fields
Customizing the form display for editing content
Customizing the display output of content
Using layouts to build landing pages
Creating menus and linking content
Using Workspaces to create content staging areas
3
Chapter 3: Displaying Content through Views
Chapter 3: Displaying Content through Views
Creating a blog landing page
Creating a block of recent blogs
Exposing filters and sorts to users to control listings
Contextual filters for filtering by path parameters
Adding related data in a view with relationships
Providing an entity reference result view
Displaying charts using Views
4
Chapter 4: Extending Drupal with Custom Code
Chapter 4: Extending Drupal with Custom Code
Technical requirements
Creating a module
Providing configuration settings for your module
Defining permissions and checking whether a user has access
Hooking into Drupal to react to entity changes
Creating an event subscriber to react to events
Creating a custom Drush command
5
Chapter 5: Creating Custom Pages
Chapter 5: Creating Custom Pages
Technical requirements
Defining a controller to provide a custom page
Using route parameters
Creating a dynamic redirect page
Creating a JSON response
Serving files for download
6
Chapter 6: Accessing and Working with Entities
Chapter 6: Accessing and Working with Entities
Technical requirements
Creating and saving an entity
Querying and loading entities
Checking entity access
Updating an entity’s field values
Performing entity validation
Deleting an entity
7
Chapter 7: Creating Forms with the Form API
Chapter 7: Creating Forms with the Form API
Technical requirements
Creating a custom form and saving configuration changes
Validating form data
Specifying conditional form elements
Using AJAX in a Drupal form
Customizing existing forms in Drupal
8
Chapter 8: Plug and Play with Plugins
Chapter 8: Plug and Play with Plugins
Technical requirements
Creating blocks using plugins
Creating a custom field type
Creating a custom field widget
Creating a custom field formatter
Creating a custom plugin type
9
Chapter 9: Creating Custom Entity Types
Chapter 9: Creating Custom Entity Types
Technical requirements
Using custom classes for entity bundles
Creating a configuration entity type
Creating a content entity type
Creating a bundle for a content entity type
Implementing access control for an entity
Providing a custom storage handler
10
Chapter 10: Theming and Frontend Development
Chapter 10: Theming and Frontend Development
Technical requirements
Creating a custom theme to style your Drupal site
Adding CSS and JavaScript to your theme
Using Twig templates in your theme
Delivering responsive images
Compiling CSS and JavaScript pre- and post-processors with Laravel Mix
Using Laravel Mix to theme your Drupal site with live reloading
11
Chapter 11: Multilingual and Internationalization
Chapter 11: Multilingual and Internationalization
Determining how the current language is selected
Translating administrative interfaces
Translating configuration
Translating content
Creating multilingual views
12
Chapter 12: Building APIs with Drupal
Chapter 12: Building APIs with Drupal
Technical requirements
Fetching data from Drupal using JSON:API
Using POST to create data with JSON:API
Using PATCH to update data with JSON:API
Using DELETE to remove data with JSON:API
Using Views to provide custom data sources
Using OAuth methods
13
Chapter 13: Writing Automated Tests in Drupal
Chapter 13: Writing Automated Tests in Drupal
Types of tests
Installing the PHPUnit test suite
Running PHPUnit
Writing a unit test
Writing a kernel test
Writing a functional test
Writing a functional JavaScript test
Writing a NightwatchJS test
14
Chapter 14: Migrating External Data into Drupal
Chapter 14: Migrating External Data into Drupal
Technical requirements
Migrating from a previous version of Drupal
Migrating data from CSV file(s)
Migrating data from an HTTP API
Writing a custom migration source plugin
Writing a custom process plugin for migrations
15
Index
Index
Why subscribe?
16
Other Books You May Enjoy
Other Books You May Enjoy
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Download a free PDF copy of this book

Creating blocks using plugins

In Drupal, a block is a piece of content that can be placed in a region provided by a theme. Blocks are used to present specific kinds of content, such as a user login form, a snippet of text, and many more.

Blocks are annotated plugins. Annotated plugins use documentation blocks to provide details of the plugin. They are discovered in the module’s Plugin class namespace. Each class in the Plugin/Block namespace will be discovered by the Block module’s plugin manager.

In this recipe, we will define a block that will display a copyright snippet and the current year and place it in the footer region.

How to do it…

  1. First, we need to create the src/Plugin/Block directory in the module’s directory. This will translate the \Drupal\mymodule\Plugin\Block namespace and allow block plugin discovery:
    mkdir -p src/Plugin/Block
  2. Create a file named Copyright.php in the newly created directory so that we can define the...
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