Becoming an Enterprise Django Developer: Discover best practices, tooling, and solutions for writing and organizing Django applications in production

Cover....1

Title Page....2

Copyright and Credits....3

Contributors....5

About the reviewer....6

Table of Contents....8

Preface....14

Part 1 – Starting a Project....20

Chapter 1: Undertaking a Colossal Project....22

Technical requirements....23

Building an enterprise....25

Reasons to choose enterprise-level applications....25

Types of enterprise systems....26

Why Python/Django?....29

Types of APIs....31

Designing and planning....33

Requirements gathering....33

Visualization and interpretation....37

Hosting and deployment....46

Creating and configuring a Heroku plan....47

Configuring Heroku environments....49

Custom repositories....54

Advanced deployment....60

Domain Name System....63

Summary....65

Chapter 2: Project Configuration....68

Technical requirements....69

Choosing development tools....70

Text editors....71

Integrated development environments....72

Starting a project....76

Using the IDE....76

Using the command line....78

Creating a virtual environment....79

Configuring the requirements.txt file(s)....81

Using the IDE....82

Using the command line....86

Project configuration....90

Django settings.py file....90

Creating an environment file....92

Creating a Procfile....95

Django static files....96

Django media files....97

Creating a .gitignore file....98

Creating a Django app....100

Using basic database settings....103

SQLite....104

MySQL....105

MariaDB....106

Oracle....106

SQL Server....107

PostgreSQL....108

Preparing PostgreSQL for Heroku....109

Installing PostgreSQL....109

Using the PgAdmin tool....112

Environment connection settings....115

Building initial table structures....116

Remote data migrations....118

Heroku database push/pull operations....119

Summary....121

Chapter 3: Models, Relations, and Inheritance....122

Technical requirements....123

Preparing for this chapter....123

Writing model classes....124

Standard field types....125

Third-party field types....131

Model field validators....134

Working with model field relationships....136

Field arguments....136

Field type – ForeignKey....138

Field type – ManyToManyField....140

Mutable versus immutable objects....141

Using the Meta subclass....143

Meta options – verbose_name and verbose_name_plural....143

Meta option – ordering....143

Meta option – indexes....144

Meta option – db_table....146

Customizing models....148

Writing methods....148

Decorators....150

Extending models....151

Extending basic model classes....152

Extending the Django User model....155

Using the Django shell....157

Running basic Python scripts....158

Generating a SECRET_KEY variable....159

Saving data....160

Loading the chapter_3 data fixture....164

Performing queries....165

Model method – all()....165

Model method – get()....166

Model method – filter()....166

Aggregates....167

Writing model managers....170

Summary....172

Part 2 – Django Components....174

Chapter 4: URLs, Views, and Templates....176

Technical requirements....177

Preparing for this chapter....178

Configuring URL patterns....179

Basic path functions....179

Redirecting patterns....189

Using path converters....191

Mapping URL patterns....195

Using simple views....195

Using kwargs in views....197

Working with conditional responses....201

Linking models to views and templates....203

Resolving URLs....205

Naming URL patterns....205

Using the reverse() function....206

Using the {% url %} template tag....208

Processing trailing slashes....210

Resolving absolute URLs....211

Creating a context processor....211

From the request object....214

From within a model class....216

Working with complex views....218

Class-based views....218

Extending class-based views....222

Asynchronous views....223

Working with templates....223

Template tags....224

Template filters....228

Custom tags and filters....229

Error page templates....231

Summary....232

Chapter 5: Django Forms....234

Technical requirements....235

Preparing for this chapter....236

Types of forms....237

Form class – Form....237

Form class – ModelForm....238

Using form fields....238

Common field arguments....239

Field widgets....241

Field validators....242

Cleaning forms....244

Method – clean_{{ your_field_name }}()....245

Method – clean()....247

Creating custom form fields....248

Field class – Field....249

Using a custom field....251

Working with form views....253

View class – FormView....253

HTTP request methods....256

Rendering forms in templates....259

Render form – as_p....261

Render form – as_table....262

Render form – as_ul....262

Render form – using template_name....263

Render demo....265

Linking a model to a form....266

View class – CreateView....267

View class – UpdateView....271

Adding inline formsets....275

Formset function – formset_factory....275

Using inline formsets in the view class....277

Rendering inline formsets in the template....279

Dynamic inline formsets....281

Summary....284

Chapter 6: Exploring the Django Admin Site....286

Technical requirements....287

Preparing for this chapter....288

Using the Django admin site....288

Activating the Django admin site....289

Logging into the Django admin site....290

Writing admin classes....291

Registering models....293

Configuring admin class options....295

Changelist view-related options....296

Change/add view-related options....305

Add view-related options....318

Adding admin class methods....320

Method – get_form()....321

Method – save_model()....323

Method – delete_model()....323

Writing custom admin form classes....324

Initializing an admin form....324

Using the Django authentication system....326

Adding a seller....326

Granting permissions....328

Permission groups....329

Summary....330

Chapter 7: Working with Messages, Email Notifications, and PDF Reports....332

Technical requirements....333

Preparing for this chapter....334

Creating a Mailtrap account....334

Using the Django messages framework....337

Enabling the Django messages framework....337

Creating a message....342

Displaying messages....348

Configuring email notifications....350

As plain text emails....350

As HTML emails....353

As HTML emails with a plain text alternative....354

With file attachments....356

That fail silently....358

Writing custom email templates....359

For plain text emails....359

For HTML emails....361

Providing template context....363

Generating PDF reports....366

As template-based PDFs....367

Adding context....372

Summary....374

Part 3 – Advanced Django Components....376

Chapter 8: Working with the Django REST Framework....378

Technical requirements....380

Preparing for this chapter....381

Installing the Django REST framework....381

Serializing objects....383

The serializer classes....385

The viewset classes....388

Using URL routers....390

Using the Browsable API....392

Building SPA-like pages....395

Creating the view....395

Building the template....397

Writing the JavaScript....398

Mapping the URL pattern....402

First demo....402

Writing custom API endpoints....405

Creating the view....405

Building the template....408

Modifying the JavaScript....409

Mapping the URL pattern....410

Second demo....411

Authenticating with tokens....415

Project configuration....415

Creating the view....417

Building the template....420

Modifying the JavaScript....420

Mapping the URL pattern....421

Third demo....422

Summary....425

Chapter 9: Django Testing....426

Technical requirements....427

Preparing for this chapter....428

Understanding automated testing in Django....430

Getting started with unit testing....432

Basic unit test script....432

Testing Django models....434

Testing HTTP view requests....438

Testing method-based views....438

Testing class-based views....441

Testing authenticated view requests....444

Using the Client() class....444

Testing Django REST API endpoints....448

Creating an object test case....448

Updating an object test case....450

Using the DjDT....453

Installing the DjDT....453

How to use the DjDT....456

Summary....467

Chapter 10: Database Management....468

Technical requirements....469

Preparing for this chapter....470

Exporting data into a data fixture....471

Using the dumpdata command....472

Importing data from a data fixture....482

Using the importdata command....482

Using the select_related() method....484

Creating the view....484

Building the template....485

Mapping the URL pattern....487

First demo....488

Using the prefetch_related() method....490

Vehicles view....490

Sellers view....494

Using the Prefetch() class....502

Modifying the view....502

Modifying the template....503

Fourth demo....504

Summary....505

Index....508

Other Books You May Enjoy....523

Django is a powerful framework but choosing the right add-ons that match the scale and scope of your enterprise projects can be tricky. This book will help you explore the multifarious options available for enterprise Django development. Countless organizations are already using Django and more migrating to it, unleashing the power of Python with many different packages and dependencies, including AI technologies.

This practical guide will help you understand practices, blueprints, and design decisions to put Django to work the way you want it to. You'll learn various ways in which data can be rendered onto a page and discover the power of Django for large-scale production applications. Starting with the basics of getting an enterprise project up and running, you'll get to grips with maintaining the project throughout its lifecycle while learning what the Django application lifecycle is.

By the end of this book, you'll have learned how to build and deploy a Django project to the web and implement various components into the site.

What You Will Learn:

• Use Django to develop enterprise-level apps to help scale your business
• Understand the steps and tools used to scale up a proof-of-concept project to production without going too deep into specific technologies
• Explore core Django components and how to use them in different ways to suit your app's needs
• Find out how Django allows you to build RESTful APIs
• Extract, parse, and migrate data from an old database system to a new system with Django and Python
• Write and run a test using the built-in testing tools in Django

Who this book is for:

The book is for Django developers who want to learn the full-stack enterprise app development lifecycle. If you are a Python web developer looking to learn how to maintain a production website and explore Django beyond the basics, this book is for you. The book assumes intermediate-level knowledge of Python programming and the Django framework.