Book Image

Django 2 by Example

By : Antonio Melé
Book Image

Django 2 by Example

By: Antonio Melé

Overview of this book

If you want to learn the entire process of developing professional web applications with Django 2, then this book is for you. You will walk through the creation of four professional Django 2 projects, teaching you how to solve common problems and implement best practices. You will learn how to build a blog application, a social image bookmarking website, an online shop and an e-learning platform. The book will teach you how to enhance your applications with AJAX, create RESTful APIs and set up a production environment for your Django 2 projects. The book walks you through the creation of real-world applications, solving common problems, and implementing best practices. By the end of this book, you will have a deep understanding of Django 2 and how to build advanced web applications.

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Table of Contents (15 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
Building a Blog Application
Building a Blog Application
Installing Django
Creating your first project
Designing the blog data schema
Creating an administration site for your models
Working with QuerySet and managers
Building list and detail views
Creating templates for your views
Adding pagination
Using class-based views
Summary
2
Enhancing Your Blog with Advanced Features
Enhancing Your Blog with Advanced Features
Sharing posts by email
Creating a comment system
Adding the tagging functionality
Retrieving posts by similarity
Summary
3
Extending Your Blog Application
Extending Your Blog Application
Creating custom template tags and filters
Adding a sitemap to your site
Creating feeds for your blog posts
Adding full-text search to your blog
Summary
4
Building a Social Website
Building a Social Website
Creating a social website project
Using the Django authentication framework
User registration and user profiles
Building a custom authentication backend
Adding social authentication to your site
Summary
5
Sharing Content in Your Website
Sharing Content in Your Website
Creating an image bookmarking website
Posting content from other websites
Creating a detail view for images
Creating image thumbnails using sorl-thumbnail
Adding AJAX actions with jQuery
Creating custom decorators for your views
Adding AJAX pagination to your list views
Summary
6
Tracking User Actions
Tracking User Actions
Building a follower system
Building a generic activity stream application
Using signals for denormalizing counts
Using Redis for storing item views
Summary
7
Building an Online Shop
Building an Online Shop
Creating an online shop project
Building a shopping cart
Registering customer orders
Launching asynchronous tasks with Celery
Summary
8
Managing Payments and Orders
Managing Payments and Orders
Integrating a payment gateway
Exporting orders to CSV files
Extending the admin site with custom views
Generating PDF invoices dynamically
Summary
9
Extending Your Shop
Extending Your Shop
Creating a coupon system
Adding internationalization and localization
Building a recommendation engine
Summary
10
Building an E-Learning Platform
Building an E-Learning Platform
Setting up the e-learning project
Building the course models
Creating models for diverse content
Creating a CMS
Managing course modules and content
Summary
11
Rendering and Caching Content
Rendering and Caching Content
Displaying courses
Adding student registration
Accessing the course contents
Using the cache framework
Summary
12
Building an API
Building an API
Building a RESTful API
Summary
13
Going Live
Going Live
Creating a production environment
Creating a custom middleware
Implementing custom management commands
Summary
14
Other Books You May Enjoy
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Retrieving posts by similarity

Now that we have implemented tagging for our blog posts, we can do many interesting things with them. Using tags, we can classify our blog posts very well. 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, we 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 case of two or more posts with the same number of tags, recommend the most recent post
  6. Limit the query to the number...
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