Typos

[nicoSWD]

Hey guys,

great book, I enjoyed it very much! Looking forward to reading the missing 40%.

I found a couple of typos, however.

3.4.5 Replaceability

• If Carlos then changes the month in his hire date to May, Christian’s hire date changes to too.

  3.4.6 Side-Effect-Free Behaviour

• Code free of side-effects is easy to understand, easy to test and less error prone error-prone.

  3.5 Basic Types

• Although $a and $b are different variables, stored low-level in different memory location locations...

  3.7.1.1 Embedded Value with an ad-hoc ORM

• However, everything is not as easy as it seems, let’s. Let's try to fetch the persisted Product with...
• An Entity should be created with the new operator just once in its life lifetime. (or lifecycle)

  3.7.3.1 PostgreSQL and JSONB

• Well, now you can, a _. As of PostgreSQL version 9.4**,**_ support for JSONB¹⁹ has been added.

  3.8 Wrap-up

• In order to handle persistence within an a DDD application...

  4.1 Introduction

• A person has always an identity and it’s always the same regarding it’s their name, or document identifier.
• An order in an e-commerce system. In that context every new order created has it’s its own identity and it’s the same over time

  4.2 Objects vs Primitive t_T_ypes

• Most of the time the identity of an entity it’s is represented as a primitive type
• With value objects, equality operation operations can be modelled and encapsulated on its in their own class classes, making concepts go from implicit to explicit.

  4.5 Testing entities

• private function __construct($anStatus)

  4.6.1 Attribute Validation

• Some people understand validation as the process where-by whereby...
• if (is_empty empty($username)) {

  4.7 Wrap-up

• We’ve showed shown several ways of providing identity
• Sometimes the I_i_dentity fits a domain concept an_d_ you could model it inside your domain

  5.1 Introduction

• Operate on only only on types belonging to the domain

  5.3 Domain Services

• Throughout conversation_s_ with...
• Domain services don’t hold any kind of state by itself themselves...

  5.6 Anemic Domain Models vs Rich Domain Models

• Or in the case to update of updating an order amount

  5.7 Wrap-up

• As we’_'_ve seen

  6.2.1 Short s_S_tory

  6.7.1 Messaging

• We’ll see _this_ in more detail this in the “Integrating Bounded Contexts” chapter.

  7.1 Structuring Code in Modules

• As Evans point on points out in the blue book, Modules are a way to communicate...

(The blue book probably referrers to Domain-Driven Design: Tackling Complexity in the Heart of Software?)

7.1.1 Modules in the Infrastructure Layer

• ...will rot fast and becoming become a mess...

  7.1.1.1 Mixing Different Technologies

• Our general advice here, is that this kind of situations are an a smell...

  8.1 Introduction

• You can fetch a User using its Repository, _._

Keep up the good work! 👍

[carlosbuenosvinos]

Value Objects fixes applied. Thanks.

[carlosbuenosvinos]

Entities too.

[carlosbuenosvinos]

Everything done

[nicoSWD]

👍