Book Image

Domain-Driven Design in PHP

By : Keyvan Akbary, Carlos Buenosvinos, Christian Soronellas
Book Image

Domain-Driven Design in PHP

By: Keyvan Akbary, Carlos Buenosvinos, Christian Soronellas

Overview of this book

Domain-Driven Design (DDD) has arrived in the PHP community, but for all the talk, there is very little real code. Without being in a training session and with no PHP real examples, learning DDD can be challenging. This book changes all that. It details how to implement tactical DDD patterns and gives full examples of topics such as integrating Bounded Contexts with REST, and DDD messaging strategies. In this book, the authors show you, with tons of details and examples, how to properly design Entities, Value Objects, Services, Domain Events, Aggregates, Factories, Repositories, Services, and Application Services with PHP. They show how to apply Hexagonal Architecture within your application whether you use an open source framework or your own.
Table of Contents (24 chapters)
Title Page
Credits
Foreword
About the Authors
Acknowledgments
www.PacktPub.com
Customer Feedback
Dedication
Preface
14
Bibliography
15
The End

Rating an Idea Using the API


During the day, your Product Owner comes to you and says: by the way, a user should be able to rate an idea using our mobile app. I think we will need to update the API, could you do it for this sprint?. Here's the PO again. No problem!. Business is impressed with your commitment.

As Robert C. Martin says:

The Web is a delivery mechanism [...] Your system architecture should be as ignorant as possible about how it is to be delivered. You should be able to deliver it as a console app, a web app, or even a web service app, without undue complication or any change to the fundamental architecture

.

Your current API is built using Silex, the PHP micro-framework based on the Symfony2 Components. Let's go for it in Listing 7:

require_once __DIR__.'/../vendor/autoload.php';

$app = new Silex\Application();

// ... more routes

$app->get(
    '/api/rate/idea/{ideaId}/rating/{rating}',
    function ($ideaId, $rating) use ($app) {
        $ideaRepository = new RedisIdeaRepository...