Django Email as Username

User authentication with email addresses instead of usernames.

Author: Tom Christie, @_tomchristie.

See also: django-email-login, django-email-usernames, django-user-accounts.

Overview

Allows you to treat users as having only email addresses, instead of usernames.

1. Provides an email auth backend and helper functions for creating users.
2. Patches the Django admin to handle email based user authentication.
3. Overides the createsuperuser command to create users with email only.
4. Treats email authentication as case-insensitive.
5. Correctly supports internationalised email addresses.

Requirements

Known to work with Django >= 1.3

Installation

Install from PyPI:

pip install django-email-as-username

Add emailusernames to INSTALLED_APPS. Make sure to include it further down the list than django.contrib.auth.

INSTALLED_APPS = (
    ...
    'emailusernames',
)

Set EmailAuthBackend as your authentication backend:

AUTHENTICATION_BACKENDS = (
    'emailusernames.backends.EmailAuthBackend',
)

Usage

Creating users

You should create users using the create_user and create_superuser functions.

from emailusernames.utils import create_user, create_superuser

create_user('me@example.com', 'password')
create_superuser('admin@example.com', 'password')

Retrieving users

You can retrieve users, using case-insensitive email matching, with the get_user function. Similarly you can use user_exists to test if a given user exists.

from emailusernames.utils import get_user, user_exists

user = get_user('someone@example.com')
...

if user_exists('someone@example.com'):
    ...

Both functions also take an optional queryset argument if you want to filter the set of users to retrieve.

user = get_user('someone@example.com',
                queryset=User.objects.filter('profile__deleted=False'))

Updating users

You can update a user's email and save the instance, without having to also modify the username.

user.email = 'other@example.com'
user.save()

Note that the user.username attribute will always return the email address, but behind the scenes it will be stored as a hashed version of the user's email.

Authenticating users

You should use email and password keyword args in calls to authenticate, rather than the usual username and password.

from django.contrib.auth import authenticate

user = authenticate(email='someone@example.com', password='password')
if user:
    ...
else:
    ...

User Forms

emailusernames provides the following forms that you can use for authenticating, creating and updating users:

• emailusernames.forms.EmailAuthenticationForm
• emailusernames.forms.EmailAdminAuthenticationForm
• emailusernames.forms.EmailUserCreationForm
• emailusernames.forms.EmailUserChangeForm

Using Django's built-in login view

If you're using django.contrib.auth.views.login in your urlconf, you'll want to make sure you pass through EmailAuthenticationForm as an argument to the view.

from emailusernames.forms import EmailAuthenticationForm

urlpatterns = patterns('',
    ...
    url(r'^auth/login$', 'django.contrib.auth.views.login',
        {'authentication_form': EmailAuthenticationForm}, name='login'),
    ...
)

Management commands

emailusernames will patch up the syncdb and createsuperuser managment commands, to ensure that they take email usernames.

bash: ./manage.py syncdb
...
You just installed Django's auth system, which means you don't have any superusers defined.
Would you like to create one now? (yes/no): yes
E-mail address:

Migrating existing projects

emailusernames includes a function you can use to easily migrate existing projects.

The migration will refuse to run if there are any users that it cannot migrate either because they do not have an email set, or because there exists a duplicate email for more than one user.

There are two ways you might choose to run this migration.

Run the update manually

Using manage.py shell:

bash: python ./manage.py shell
>>> from emailusernames.utils import migrate_usernames
>>> migrate_usernames()
Successfully migrated usernames for all 12 users

Run as a data migration

Using south, and assuming you have an app named accounts, this might look something like:

bash: python ./manage.py datamigration accounts email_usernames
Created 0002_email_usernames.py.

Now edit 0002_email_usernames.py:

from emailusernames.utils import migrate_usernames

def forwards(self, orm):
    "Write your forwards methods here."
    migrate_usernames()

And finally apply the migration:

python ./manage.py migrate accounts

Running the tests

If you have cloned the source repo, you can run the tests using the provided manage.py:

./manage.py test

Note that this application (unsurprisingly) breaks the existing django.contrib.auth tests. If your test suite currently includes those tests you'll need to find a way to explicitly disable them.

Changelog

1.5.1

To upgrade from <=1.4.6 you must also run the username migration as described above.

• Fix username hashing bug.

1.5.0

• Version bump, since the username hashes changed from 1.4.6 to 1.4.7. (Bumping to 1.5 should make it more obvious that users should check the changelog before upgrading.)

1.4.8

• Fix syntax error from 1.4.7

1.4.7

• Support for international domain names.
• Fix auto-focus on login forms.

1.4.6

• EmailAuthenticationForm takes request as first argument, same as Django's AuthenticationForm. Now fixed so it won't break if you didn't specify data as a kwarg.

1.4.5

• Email form max lengths should be 75 chars, not 70 chars.
• Use get_static_prefix (Supports 1.3 and 1.4.), not admin_media_prefix.

1.4.4

• Add 'queryset' argument to get_user, user_exists

1.4.3

• Fix support for loading users from fixtures. (Monkeypatch User.save_base, not User.save)

1.4.2

• Fix support for Django 1.4

1.4.1

• Fix bug with displaying usernames correctly if migration fails

1.4.0

• Easier migrations, using migrate_usernames()

1.3.1

• Authentication backend now sets User.backend.

1.3.0

• Use hashed username lookups for performance.
• Use Django's email regex validator, rather than providing our own version.
• Tweaks to admin.
• Tweaks to documentation and notes on upgrading.

1.2.0

• Fix import bug in createsuperuser managment command.

1.1.0

• Fix bug in EmailAuthenticationForm

1.0.0

• Initial release

License

Copyright © 2012, DabApps.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.