Book Image

Django 3 Web Development Cookbook - Fourth Edition

By : Aidas Bendoraitis, Jake Kronika
Book Image

Django 3 Web Development Cookbook - Fourth Edition

By: Aidas Bendoraitis, Jake Kronika

Overview of this book

Django is a web framework for perfectionists with deadlines, designed to help you build manageable medium and large web projects in a short time span. This fourth edition of the Django Web Development Cookbook is updated with Django 3's latest features to guide you effectively through the development process. This Django book starts by helping you create a virtual environment and project structure for building Python web apps. You'll learn how to build models, views, forms, and templates for your web apps and then integrate JavaScript in your Django apps to add more features. As you advance, you'll create responsive multilingual websites, ready to be shared on social networks. The book will take you through uploading and processing images, rendering data in HTML5, PDF, and Excel, using and creating APIs, and navigating different data types in Django. You'll become well-versed in security best practices and caching techniques to enhance your website's security and speed. This edition not only helps you work with the PostgreSQL database but also the MySQL database. You'll also discover advanced recipes for using Django with Docker and Ansible in development, staging, and production environments. By the end of this book, you will have become proficient in using Django's powerful features and will be equipped to create robust websites.
Table of Contents (15 chapters)

Creating hierarchical categories with django-treebeard

There are several algorithms for tree structures, each with its own benefits. An app called django-treebeard, an alternative to django-mptt that is used by django CMS, provides support for three tree forms:

  • Adjacency List trees are simple structures, where each node has a parent attribute. Although read operations are fast, this comes at the cost of slow writes.
  • Nested Sets trees and MPTT trees are the same; they structure nodes as sets nested beneath the parent. This structure also provides very fast read access at the cost of more expensive writing and deletion, particularly when writes require some particular ordering.
  • Materialized Path trees are built with each node in the tree having an associated path attribute, which is a string indicating the full path from the root to the node—much like a URL path indicates...