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Python Programming Blueprints

You're reading from   Python Programming Blueprints Build nine projects by leveraging powerful frameworks such as Flask, Nameko, and Django

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Product type Paperback
Published in Feb 2018
Publisher Packt
ISBN-13 9781786468161
Length 456 pages
Edition 1st Edition
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Authors (3):
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Marcus Pennington Marcus Pennington
Author Profile Icon Marcus Pennington
Marcus Pennington
Pierluigi Riti Pierluigi Riti
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Pierluigi Riti
Daniel Furtado Daniel Furtado
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Daniel Furtado
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Table of Contents (11) Chapters Close

Preface 1. Implementing the Weather Application 2. Creating a Remote-Control Application with Spotify FREE CHAPTER 3. Casting Votes on Twitter 4. Exchange Rates and the Currency Conversion Tool 5. Building a Web Messenger with Microservices 6. Extending TempMessenger with a User Authentication Microservice 7. Online Video Game Store with Django 8. Order Microservice 9. Notification Serverless Application 10. Other Books You May Enjoy

Creating new users


Now that we are able to log in and log out of our application, we need to add another page so the users can create accounts on our application and place orders.

There are some rules that we want to enforce when creating a new account. The rules are:

  • The username field is required, and it has to be unique to our application
  • The email field is required, and it has to be unique to our application
  • The last and first name are required
  • Both password fields are required, and they must match

If any of these rules are not followed, we will not create the user account, and an error should be returned to the user.

With that said, let's add a small helper function that will verify whether a field has a value that already exists in the database. Open the file forms.py in gamestore/main. First, we need to import the User model:

from django.contrib.auth.models import User

Then, add the validate_unique_user function:

def validate_unique_user(error_message, **criteria):
    existent_user = User...
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