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...