Book Image

Building SPAs with Django and HTML Over the Wire

By : Andros Fenollosa
Book Image

Building SPAs with Django and HTML Over the Wire

By: Andros Fenollosa

Overview of this book

The HTML over WebSockets approach simplifies single-page application (SPA) development and lets you bypass learning a JavaScript rendering framework such as React, Vue, or Angular, moving the logic to Python. This web application development book provides you with all the Django tools you need to simplify your developments with real-time results. You’ll learn state-of-the-art WebSocket techniques to realize real-time applications with minimal reliance on JavaScript. This book will also show you how to create a project with Docker from the ground up, test it, and deploy it on a server. You’ll learn how to create a project, add Docker, and discover development libraries, Django channels, and bidirectional communication, and from then, on you’ll create real projects of all kinds using HTML over WebSockets as a chat app or a blog with real-time comments. In addition, you’ll modernize your development techniques by moving from using an SSR model to creating web pages using WebSockets over HTML. With Django, you’ll be able to create SPAs with professional real-time projects where the logic is in Python. By the end of this Django book, you’ll be able to build real-time applications, as well as gaining a solid understanding of WebSockets with Django.
Table of Contents (14 chapters)
1
Part 1: Getting Started with Python
4
Part 2: WebSockets in Django
8
Part 3: HTML over WebSockets
11
Part 4: Simplifying the frontend with Stimulus

Deleting rows from a database

In the previous sections, we managed to build a system where we could add new messages, list them, and paginate them. But so far, we are unable to delete anything.

The way the project is structured, it is really quick to implement:

  1. We check in /app/website/templates/components/_list-messages.html that we are adding to each button a dataset with the id. We do this task when we list the messages; we must be aware of the source where the id that we will use comes from to know which message we must delete:
    <button class="button messages__delete" data-id="{{ 
        message.id }}"> Delete</button>
  2. In /static/js/index.js, add the deleteMessage function. We will capture the dataset with the id and send it to the consumer with the action "delete message". In addition, we will add each listener after the listener of the pager. Let’s not forget the reason for this positioning: all events...