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Domain-Driven Design in PHP

Domain-Driven Design in PHP

By : Keyvan Akbary, Carlos Buenosvinos, Christian Soronellas
4.3 (9)
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Domain-Driven Design in PHP

Domain-Driven Design in PHP

4.3 (9)
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 (16 chapters)
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14
Bibliography
15
The End

Why Aggregates?


The avid reader will probably be wondering what all of this has to do with Aggregates and Aggregate Design. And actually, that's a pretty good question. There's a direct relation, so let's explore it. The Relational Model uses tables to store data. Those tables are composed of rows, where each row usually represents an instance of a concept of the application's interest. Additionally, each row can point to other rows on other tables of the same database, and the consistency between this relationship can be kept by the use of referential integrity. This model is fine; however, it lacks a very basic word: the object word.

Indeed, when we talk about the Relational Model, we're namely talking about tables, rows, and relationships between rows. And when we talk about the Object-Oriented Model, we're talking mainly about compositions of objects. So every time we fetch data — a set of rows — from a relational database, we run a translation process responsible for building an in-memory...

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