django-social-auth create new user programmatically by facebook_id - django

Question

Is there any way to create User and UserSocialAuth objects without actually loggin in but only having FACEBOOK_ID of a user you want to create an account for?
I'm creating a simple app where user can select a friend from FB and create some model object for him. Since I have reference to User entity I need to have it whether that friend has been registered or not. And if not I need to create the whole object graph programmatically. It is possible to do using standard functionality of django-social-auth or should I create records in 'auth_user' and 'social_auth_usersocialauth' by hand?

Answer 1

Use this custom backend that sets the username to the person's FACEBOOK_ID.
from social_auth.backends.facebook import FacebookBackend
class IDFacebookBackend(FacebookBackend):
"""Facebook OAuth2 authentication backend"""
def get_user_details(self, response):
"""Return user details from Facebook account"""
return {'username': response.get('id'),
'email': response.get('email', ''),
'fullname': response.get('name', ''),
'first_name': response.get('first_name', ''),
'last_name': response.get('last_name', '')}
Use this version of get_username in your auth pipleline instead of social_auth.backends.pipeline.user.get_username
def get_username(details, user=None, *args, **kwargs):
" Make Username from User Id "
if user:
return {'username': UserSocialAuth.user_username(user)}
else:
return details['username']
Your pipeline should look like this:
SOCIAL_AUTH_PIPELINE = (
'social_auth.backends.pipeline.social.social_auth_user',
'our_custom_auth.get_username', # <= This should be the previous function
'social_auth.backends.pipeline.user.create_user',
'social_auth.backends.pipeline.social.associate_user',
'social_auth.backends.pipeline.social.load_extra_data',
'social_auth.backends.pipeline.user.update_user_details'
)
Then all you need to do is call User.objects.create(username=friends_facebook_id) and you have a User that cannot login with username/pass, but can be referenced easily through ForeignKey fields.
Also, when that "Friend" comes and joins up with your site at a later date (Using SocialAuth), they will automatically be given this User object and your internal graph will stay accurate.

Answer 2

So I used the idea described above but with less effort and eventually I ended up with the following:
I overrode associate_by_email stage from SOCIAL_AUTH_PIPELINE to my own implementation of associate_by_username. Since username is unique in Django auth we can use that.
So totally changes are
Implement associate_by_username
from django.core.exceptions import MultipleObjectsReturned, ObjectDoesNotExist
from social_auth.exceptions import AuthException
from django.contrib.auth.models import User
def associate_by_username(details, user=None, *args, **kwargs):
"""Return user entry with same email address as one returned on details."""
if user:
return None
username = details.get('username')
if username:
try:
return {'user': User.objects.get(username=username)}
except MultipleObjectsReturned:
raise AuthException(kwargs['backend'], 'Not unique email address.')
except ObjectDoesNotExist:
pass
Then I add this method to pipeline
SOCIAL_AUTH_PIPELINE = (
'social_auth.backends.pipeline.social.social_auth_user',
'core.auth.associate_by_username',
'social_auth.backends.pipeline.user.get_username',
'social_auth.backends.pipeline.user.create_user',
'social_auth.backends.pipeline.social.associate_user',
'social_auth.backends.pipeline.social.load_extra_data',
'social_auth.backends.pipeline.user.update_user_details',
)
And when I need to get user I look it up by facebookId (recipient = UserSocialAuth.objects.filter(uid=target_facebook_id)
) but create by facebookUsername (User(username=target_username))