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)

Defining relative paths in the settings

Django requires you to define different file paths in the settings, such as the root of your media, the root of your static files, the path to templates, and the path to translation files. For each developer of your project, the paths may differ as the virtual environment can be set up anywhere and the user might be working on macOS, Linux, or Windows. Even when your project is wrapped in a Docker container, it reduces the maintainability and portability to define absolute paths. In any case, there is a way to define these paths dynamically so that they are relative to your Django project directory.

Getting ready

Have a Django project started and open settings/_base.py.

How to do it...

Modify your path-related settings accordingly, instead of hardcoding the paths to your local directories, as follows:

# settings/_base.py
import os
BASE_DIR = os.path.dirname(
os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
)
# ...
TEMPLATES = [{
# ...
DIRS: [
os.path.join(BASE_DIR, 'myproject', 'templates'),
],
# ...
}]
# ...
LOCALE_PATHS = [
os.path.join(BASE_DIR, 'locale'),
]
# ...
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'myproject', 'site_static'),
]
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

How it works...

By default, Django settings include a BASE_DIR value, which is an absolute path to the directory containing manage.py (usually one level higher than the settings.py file or two levels higher than settings/_base.py). Then, we set all of the paths relative to BASE_DIR using the os.path.join() function.

Based on the directory layout we set down in the Creating a project file structure recipe, we would insert 'myproject' as an intermediary path segment for some of the previous examples since the associated folders were created within this.

See also

  • The Creating a project file structure recipe
  • The Working with Docker containers for Django, Gunicorn, Nginx, and PostgreSQL recipe
  • The Including external dependencies in your project recipe