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Magento 2 Development Quick Start Guide
Magento 2 Development Quick Start Guide

Magento 2 Development Quick Start Guide: Build better stores by extending Magento

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Magento 2 Development Quick Start Guide

Working with Entities

Every Magento module hosts its models within the Models directory. Some of these models are persistable, while others are non-persistable. A great deal of custom, third-party, and core Magento modules persist data to the database. Data persistence is one of the key functionalities that platforms like Magento need to deal with. Terminology-wise, Magento uses terms such as model, resource model, and collection for a group of three classes that deal with data persistence, that is, create, read, update, and delete (CRUD) operations.

To better understand the overall mechanism of entities, we are going to take a closer look at the following:

  • Understanding types of models:
    • Creating a simple model
    • Methods worth memorizing
  • Working with setup scripts:
    • The InstallSchema script
    • The UpgradeSchema script
    • The Recurring script
    • The InstallData script
    • The UpgradeData...

Technical requirements

Understanding types of models

There are two types of persistence models in Magento: simple and Entityattributevalue (EAV). The term entity is tossed around interchangeably between the two types of models. We can think of an entity as any persistable model.

The Subscriber entity of the Magento_Newsletter module is an example of a simple model. We can see that it's comprised of the following:

  • A model of type Magento\Newsletter\Model\Subscriber extends Magento\Framework\Model\AbstractModel
  • A resource model of type Magento\Newsletter\Model\ResourceModel\Subscriber extends Magento\Framework\Model\ResourceModel\Db\AbstractDb
  • A collection of type Magento\Newsletter\Model\ResourceModel\Subscriber\Collection extends Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection

The Customer entity of the Magento_Customer module is an example of an EAV model...

Working with setup scripts

Every time a module is installed via a php bin/magento module:enable command, Magento shows the following message: To make sure that the enabled modules are properly registered, run 'setup:upgrade'. The php bin/magento setup:upgrade command upgrades the Magento application, database data, and schema. Once triggered, the upgrade command instantiates Magento\Setup\Model\Installer, which then goes through a series of methods. Its getSchemaDataHandler method reveals the types of available setup scripts:

  • InstallSchema.php
  • UpgradeSchema.php
  • Recurring.php
  • InstallData.php
  • UpgradeData.php
  • RecurringData.php

These scripts live under the <VendorName>/<ModuleName>/Setup directory.

Once successfully finished, the setup:upgrade command makes a new entry, or updates an existing one, in the setup_module table. There, we can see the schema_version...

Extending entities

We extend entities by adding additional attributes to them. Referring back to the magical getter and setter methods mentioned in the context of Magento\Framework\DataObject, the logical thinking might be: what's the big deal; can't we just add new database columns via UpgradeSchema and use magical getter and setter methods to go around it? The answer is both yes and no, but mainly leaning toward no – we will soon learn why.

To better explain this, let's take a look at Magento\Sales\Model\Order, the entity model. This model implements the Magento\Sales\Api\Data\OrderInterface interface, which further extends Magento\Framework\Api\ExtensibleDataInterface. Here, we can see a constant defining a key for the extension attributes object. This is somewhat of a starting point for extending entities. Suffice to say, there is an extra abstraction...

Summary

Throughout this chapter, we learned how to differentiate the three types of Magento models: non-persistable, persistable simple, and persistable EAV. The inners of EAV models are left out of scope due to their inherently complex nature. We then took a look through six different setup scripts. These give us a great deal of flexibility over schema and data management. Combined with extension attributes, we get a powerful mechanism for extending built-in entities. Though somewhat tedious, the extension attributes mechanism use of interfaces ensures that integrators can extend this built-in functionality with complex data types.

Moving forward, we are going to take a look at the powerful web API that's implemented in Magento.

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Key benefits

  • A straightforward guide to developing with Magento
  • Examples of different types of extension
  • Customize the Magento storefront and admin areas

Description

Magento is an open-source, enterprise-level e-commerce platform with unlimited scope for customization. This makes it a great choice not only for vendors but for developers as well. This book guides you through Magento development, teaching you how to develop modules that extend or change its functionality, leading to more ?exible and profitable Magento stores. You start with a structural overview of the key Magento development components. You will learn where things such as plugins, events, models, controllers, layouts, and UI components ft into the development landscape. You will go through examples of using these components to extend Magento. As you progress, you will be building a diverse series of small but practical Magento modules. By the end of this book, you will not only have a solid foundation in the Magento development architecture; but you will also have practical experience in developing modules to customize and extend Magento stores.

Who is this book for?

This book is for competent PHP developers, with only basic knowledge of the Magento platform required.

What you will learn

  • Develop a simple shipping module
  • Build admin interfaces with the built-in form and listing UI components
  • Implement JavaScript components for improved customer experience
  • Accommodate vendor needs by adding new catalog-related features
  • Develop your way to a better checkout
  • Improve customer interaction with new customer-related extensions
  • Create new web APIs to make your modules more extensible
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Length: 218 pages
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Language : English
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Table of Contents

10 Chapters
Understanding the Magento Architecture Chevron down icon Chevron up icon
Working with Entities Chevron down icon Chevron up icon
Understanding Web APIs Chevron down icon Chevron up icon
Building and Distributing Extensions Chevron down icon Chevron up icon
Developing for Admin Chevron down icon Chevron up icon
Developing for Storefront Chevron down icon Chevron up icon
Customizing Catalog Behavior Chevron down icon Chevron up icon
Customizing Checkout Experiences Chevron down icon Chevron up icon
Customizing Customer Interactions Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Full star icon 5
(2 Ratings)
5 star 100%
4 star 0%
3 star 0%
2 star 0%
1 star 0%
cru Dec 27, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
da leggere con attenzione
Amazon Verified review Amazon
Danny Z Jan 26, 2021
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good stuff, relevant even until this year (2021 as of this writing) I like the layout of the chapters and progression as you read the book front-to-back. Picked up the other author's book on Magento 2 since I enjoyed this one so much.
Amazon Verified review Amazon
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