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  • Book Overview & Buying Django 5 By Example
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Django 5 By Example

Django 5 By Example - Fifth Edition

By : Antonio Melé
4.6 (36)
Buy this Book
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Django 5 By Example

Django 5 By Example

4.6 (36)
By: Antonio Melé
Buy this Book

Overview of this book

If you want to learn Django by doing, this book is for you. This 2025 EDITION, fully updated to Django 5.2 LTS, is the fifth edition of the best-selling Django By Example franchise that helps you build real-world web apps. This book will walk you through planning and creation, solving common problems, and implementing best practices using a step-by-step approach. You’ll cover a wide range of web application development topics through four different projects: a blog application, a social website, an e-commerce application, and an e-learning platform. Pick up what’s new in Django 5 as you build end-to-end Python web apps, follow detailed project plans, and understand the hows and whys of Django. This is a practical and approachable book that will have you creating web apps quickly.
Table of Contents (20 chapters)
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Preface
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Preface
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Who this book is for
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What this book covers
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To get the most out of this book
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Get in touch
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Join us on Discord!
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Head to https://djangobyexample.com/ to find out more about the book and what past readers thought about it.
Lock Free Chapter
1
Building a Blog Application
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Building a Blog Application
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Installing Python
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Creating a Python virtual environment
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Installing Django
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Django overview
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Creating your first project
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Creating the blog data models
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Creating an administration site for models
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Working with QuerySets and managers
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Building list and detail views
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Creating templates for your views
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The request/response cycle
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Management commands used in this chapter
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Summary
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Additional resources
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Join us on Discord!
2
Enhancing Your Blog and Adding Social Features
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Enhancing Your Blog and Adding Social Features
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Functional overview
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Using canonical URLs for models
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Creating SEO-friendly URLs for posts
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Adding pagination
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Building class-based views
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Recommending posts by email
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Creating a comment system
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Summary
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Additional resources
3
Extending Your Blog Application
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Extending Your Blog Application
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Functional overview
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Implementing tagging with django-taggit
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Retrieving posts by similarity
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Creating custom template tags and filters
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Adding a sitemap to the site
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Creating feeds for blog posts
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Adding full-text search to the blog
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Summary
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Expanding your project using AI
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Additional resources
4
Building a Social Website
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Building a Social Website
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Functional overview
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Creating a social website project
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Using the Django authentication framework
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User registration and user profiles
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Summary
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Additional resources
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Join us on Discord!
5
Implementing Social Authentication
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Implementing Social Authentication
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Functional overview
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Technical requirements
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Using the messages framework
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Building a custom authentication backend
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Adding social authentication to your site
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Summary
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Additional resources
6
Sharing Content on Your Website
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Sharing Content on Your Website
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Functional overview
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Creating an image bookmarking website
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Posting content from other websites
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Creating the detail view for images
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Creating image thumbnails using easy-thumbnails
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Adding asynchronous actions with JavaScript
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Summary
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Additional resources
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Tracking User Actions
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Tracking User Actions
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Functional overview
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Building a follow system
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Creating an activity stream application
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Using signals for denormalizing counts
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Using Django Debug Toolbar
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Counting image views with Redis
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Summary
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Expanding your project using AI
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Additional resources
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Building an Online Shop
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Building an Online Shop
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Functional overview
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Creating an online shop project
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Building a shopping cart
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Registering customer orders
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Creating asynchronous tasks
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Summary
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Additional resources
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Join us on Discord!
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Managing Payments and Orders
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Managing Payments and Orders
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Functional overview
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Integrating a payment gateway
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Exporting orders to CSV files
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Extending the administration site with custom views
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Generating PDF invoices dynamically
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Summary
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Additional resources
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Extending Your Shop
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Extending Your Shop
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Functional overview
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Creating a coupon system
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Building a recommendation engine
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Summary
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Additional resources
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Adding Internationalization to Your Shop
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Adding Internationalization to Your Shop
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Functional overview
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Internationalization with Django
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Preparing your project for internationalization
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Translating Python code
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Translating templates
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Using the Rosetta translation interface
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Fuzzy translations
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URL patterns for internationalization
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Allowing users to switch language
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Translating models with django-parler
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Format localization
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Using django-localflavor to validate form fields
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Expanding your project using AI
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Summary
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Additional resources
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Building an E-Learning Platform
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Building an E-Learning Platform
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Functional overview
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Setting up the e-learning project
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Serving media files
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Building the course models
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Creating models for polymorphic content
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Adding authentication views
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Summary
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Additional resources
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Join us on Discord!
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Creating a Content Management System
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Creating a Content Management System
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Functional overview
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Creating a CMS
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Managing course modules and their contents
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Reordering modules and their contents
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Summary
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Additional resources
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Rendering and Caching Content
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Rendering and Caching Content
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Functional overview
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Displaying the catalog of courses
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Adding student registration
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Rendering course contents
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Using the cache framework
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Installing Memcached
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Django cache settings
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Cache levels
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Using the Redis cache backend
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Summary
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Additional resources
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Building an API
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Building an API
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Functional overview
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Building a RESTful API
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Consuming the API
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Extending serializers
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Adding pagination to views
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Building the course serializer
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Creating nested serializers
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Creating ViewSets and routers
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Building custom API views
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Handling authentication
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Adding permissions to views
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Adding additional actions to ViewSets
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Creating custom permissions
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Serializing course contents
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Consuming the RESTful API
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Summary
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Additional resources
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Building a Chat Server
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Building a Chat Server
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Functional overview
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Creating a chat application
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Real-time Django with Channels
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Installing Channels and Daphne
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Writing a consumer
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Routing
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Implementing the WebSocket client
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Enabling a channel layer
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Modifying the consumer to be fully asynchronous
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Persisting messages into the database
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Integrating the chat application with existing views
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Summary
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Additional resources
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Going Live
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Going Live
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Creating a production environment
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Using Docker Compose
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Serving Django through WSGI and NGINX
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Securing your site with SSL/TLS
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Configuring Daphne for Django Channels
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Creating a custom middleware
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Implementing custom management commands
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Summary
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Expanding your project using AI
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Additional resources
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Join us on Discord!
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Other Books You May Enjoy
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Other Books You May Enjoy
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Index
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Index

Retrieving posts by similarity

Now that we have implemented tagging for blog posts, you can do many interesting things with tags. Tags allow you to categorize posts in a non-hierarchical manner. Posts about similar topics will have several tags in common. We will build a functionality to display similar posts by the number of tags they share. In this way, when a user reads a post, we can suggest to them that they read other related posts.

In order to retrieve similar posts for a specific post, you need to perform the following steps:

  1. Retrieve all tags for the current post.
  2. Get all posts that are tagged with any of those tags.
  3. Exclude the current post from that list to avoid recommending the same post.
  4. Order the results by the number of tags shared with the current post.
  5. In the case of two or more posts with the same number of tags, recommend the most recent post.
  6. Limit the query to the number of posts you want to recommend.

These steps are translated into a complex QuerySet that...

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