Book Image

Web Development with Django

By : Ben Shaw, Saurabh Badhwar, Andrew Bird, Bharath Chandra K S, Chris Guest
Book Image

Web Development with Django

By: Ben Shaw, Saurabh Badhwar, Andrew Bird, Bharath Chandra K S, Chris Guest

Overview of this book

Do you want to develop reliable and secure applications which stand out from the crowd, rather than spending hours on boilerplate code? Then the Django framework is where you should begin. Often referred to as a 'batteries included' web development framework, Django comes with all the core features needed to build a standalone application. Web Development with Django takes this philosophy and equips you with the knowledge and confidence to build real-world applications using Python. Starting with the essential concepts of Django, you'll cover its major features by building a website called Bookr – a repository for book reviews. This end-to-end case study is split into a series of bitesize projects that are presented as exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. As you progress, you'll learn various practical skills, including how to serve static files to add CSS, JavaScript, and images to your application, how to implement forms to accept user input, and how to manage sessions to ensure a reliable user experience. Throughout this book, you'll cover key daily tasks that are part of the development cycle of a real-world web application. By the end of this book, you'll have the skills and confidence to creatively tackle your own ambitious projects with Django.
Table of Contents (17 chapters)
Preface

7. Advanced Form Validation and Model Forms

Overview

Continuing your journey with the Bookr application, you will begin this chapter by adding a new form to your app with custom multi-field validation and form cleaning. You will learn how to set the initial values on your form and customize the widgets (the HTML input elements that are being generated). Then you will be introduced to the ModelForm class, which allows a form to be automatically created from a model. You will use it in a view to automatically save the new or changed Model instance.

By the end of this chapter, you will know how to add extra multi-field validation to Django forms, how to customize and set form widgets for fields, how to use ModelForms to automatically create a form from a Django model, and how to automatically create Model instances from ModelForms.