Book Image

Web Development with Django - Second Edition

By : Ben Shaw, Saurabh Badhwar, Chris Guest, Bharath Chandra K S
4.7 (3)
Book Image

Web Development with Django - Second Edition

4.7 (3)
By: Ben Shaw, Saurabh Badhwar, Chris Guest, Bharath Chandra K S

Overview of this book

Do you want to develop reliable and secure applications that stand out from the crowd without spending hours on boilerplate code? You’ve made the right choice trusting the Django framework, and this book will tell you why. 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 will take you through all the essential concepts and help you explore its power to build real-world applications using Python. Throughout the book, you’ll get the grips with the major features of Django 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 presented as exercises and activities, allowing you to challenge yourself in an enjoyable and attainable way. As you advance, you'll acquire 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. You’ll cover everyday tasks that are part of the development cycle of a real-world web application. By the end of this Django book, you'll have the skills and confidence to creatively develop and deploy your own projects.
Table of Contents (19 chapters)

File uploads with Django forms

In Chapter 6, Forms, we saw how Django makes it easy to define forms and automatically render them to HTML. In the previous example, we defined our form manually and wrote the HTML. We can replace this with a Django form and implement the file input with a FileField constructor.

Here’s how FileField is defined on a form:

from django import forms
class ExampleForm(forms.Form):
    file_upload = forms.FileField()

The FileField constructor can take the following keyword arguments:

  • Required: This should be True for required fields and False if the field is optional
  • max_length: This refers to the maximum length of the filename of the file being uploaded
  • allow_empty_file: A field with this argument is considered to be valid even if the uploaded file is empty (has a size of 0)

Apart from these three keyword arguments, the constructor can also accept the standard Field arguments, such as widget. The default...