Book Image

Drupal 8 Development Cookbook - Second Edition

By : Matt Glaman
Book Image

Drupal 8 Development Cookbook - Second Edition

By: Matt Glaman

Overview of this book

Began as a message board, Drupal today is open source software maintained and developed by a community of over 1,000,000 users and developers. Drupal is used by numerous local businesses to global corporations and diverse organizations all across the globe. With Drupal 8’s exciting features it brings, this book will be your go-to guide to experimenting with all of these features through helpful recipes. We’ll start by showing you how to customize and configure the Drupal environment as per your requirements, as well as how to install third-party libraries and then use them in the Drupal environment. Then we will move on to creating blocks and custom modules with the help of libraries. We will show you how to use the latest mobile-first feature of Drupal 8, which will help you make your apps responsive across all the major platforms. This book will also show you how to incorporate multilingual facilities in your sites, use web services and third-party plugins with your applications from inside Drupal 8, and test and deploy your apps.
Table of Contents (20 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Processing submitted form data

A form's purpose is to collect data and do something with the data that was submitted. All forms need to implement the \Drupal\Core\Form\FormInterface interface. The interface defines a submit method. Once the Form API has invoked the class's validation method, the submit method can be run.

This recipe will be based on the custom module and form created in the Creating a form recipe of this chapter. We will convert the form to \Drupal\Core\FormConfigBaseForm, allowing us to save our configuration and reuse code provided by Drupal core.

Getting ready

In this recipe, we will use the module and custom form created in the first Creating a form recipe.

How to do it...

  1. In your module's directory, create a config directory, and then create a directory inside it named install.
  1. Create a file named drupalform.schema.yml . This file will tell Drupal about the configuration item that we want to save.
  1. Add the following configuration schema definition to drupalform.schema.yml: