Use email addresses for user name for django 1.0+

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"""
@author: chris
"""
from django.contrib.auth.backends import ModelBackend
from django.contrib.auth.models import User
from django.forms.fields import email_re

class EmailBackend(ModelBackend):
    """
    Authenticates against django.contrib.auth.models.User.
    """
    def authenticate(self, username=None, password=None):
        #If username is an email address, then try to pull it up
        if email_re.search(username):
            try:
                user = User.objects.get(email=username)
            except User.DoesNotExist:
                return None
        else:
            #We have a non-email address username we should try username
            try:
                user = User.objects.get(username=username)
            except User.DoesNotExist:
                return None
        if user.check_password(password):
            return user

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Comments

revolunet (on December 30, 2009):

thanx, very nice example

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styts (on January 6, 2010):

thanks, i had a hard time figuring out the correct solution due to all the comments in the /snippets/74/ thread.

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jokull (on January 8, 2010):

Check out: http://bitbucket.org/jokull/django-email-login/

Also includes a simple django-registration backend and forms. Requires a recent checkout of Django.

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joncombe (on February 13, 2011):

Nice solution, thank you.

I did find a tiny edge-case problem with users who registered on my site, unregistered themselves, then re-registered again because this caused the User.objects.get() line to return > 1 result. To fix it, simply change, user = User.objects.get(email=username) to user = User.objects.get(email=username, is_active=True) on lines 16 and 22.

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kidzik (on June 13, 2011):

I've posted updated version for django 1.3

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