Book Image

Django 2 Web Development Cookbook - Third Edition

By : Jake Kronika, Aidas Bendoraitis
Book Image

Django 2 Web Development Cookbook - Third Edition

By: Jake Kronika, Aidas Bendoraitis

Overview of this book

Django is a framework designed to balance rapid web development with high performance. It handles high levels of user traffic and interaction, integrates with a variety of databases, and collects and processes data in real time. This book follows a task-based approach to guide you through developing with the Django 2.1 framework, starting with setting up and configuring Docker containers and a virtual environment for your project. You'll learn how to write reusable pieces of code for your models and manage database changes. You'll work with forms and views to enter and list data, applying practical examples using templates and JavaScript together for the optimum user experience. This cookbook helps you to adjust the built-in Django administration to fit your needs and sharpen security and performance to make your web applications as robust, scalable, and dependable as possible. You'll also explore integration with Django CMS, the popular content management suite. In the final chapters, you'll learn programming and debugging tricks and discover how collecting data from different sources and providing it to others in various formats can be a breeze. By the end of the book, you'll learn how to test and deploy projects to a remote dedicated server and scale your application to meet user demands.
Table of Contents (14 chapters)

Using signals to notify administrators about new entries

The Django framework includes the concept of signals, which are similar to events in JavaScript. There is a handful of built-in signals that you can use to trigger actions before and after the initialization of a model, saving or deleting an instance, migrating the database schema, handling a request, and so on. Moreover, you can create your own signals in your reusable apps and handle them in other apps. In this recipe, you will learn how to use signals to send emails to administrators whenever a specific model is saved.

Getting ready

Let's start with the viral_videos app that we created in the Using database query expressions recipe.

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