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Becoming an Enterprise Django Developer

You're reading from   Becoming an Enterprise Django Developer Discover best practices, tooling, and solutions for writing and organizing Django applications in production

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Product type Paperback
Published in Jun 2022
Publisher Packt
ISBN-13 9781801073639
Length 526 pages
Edition 1st Edition
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Authors (2):
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Mike Dinder Mike Dinder
Author Profile Icon Mike Dinder
Mike Dinder
Michael Dinder Michael Dinder
Author Profile Icon Michael Dinder
Michael Dinder
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Table of Contents (15) Chapters Close

Preface 1. Part 1 – Starting a Project
2. Chapter 1: Undertaking a Colossal Project FREE CHAPTER 3. Chapter 2: Project Configuration 4. Chapter 3: Models, Relations, and Inheritance 5. Part 2 – Django Components
6. Chapter 4: URLs, Views, and Templates 7. Chapter 5: Django Forms 8. Chapter 6: Exploring the Django Admin Site 9. Chapter 7: Working with Messages, Email Notifications, and PDF Reports 10. Part 3 – Advanced Django Components
11. Chapter 8: Working with the Django REST Framework 12. Chapter 9: Django Testing 13. Chapter 10: Database Management 14. Other Books You May Enjoy

Creating custom form fields

Sometimes, the needs of the project outweigh the options that are provided to us. If a field class is not available by default, we have two options: create our own or use a third-party package where someone else has already written a field class for us.

Continuing with the same ContactForm class, we will demonstrate the differences between validation mechanisms by building a MultipleEmailField. This will be a single field, accepting a single string of emails, all separated by commas. Each email item will then be checked independently to see whether it is in a valid email string format. We will use the same validate_email() function as we did before to enforce this constraint.

Field class – Field

Django provides a class called Field found in the django.forms.fields library, used to construct custom field classes. Any of the options and methods found in this class can be overwritten as needed. For example, overriding the def __init__() method...

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