How to avoid this "'tuple' object has no attribute 'photo'" error in my custom User module?

Question

I'm trying to store additional information about users that login with facebook to my site, so I created a UserProfile model.

This is how I define the UserProfile:

models.py

from django.contrib.auth.models import User
from django.db.models.signals import post_save

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    photo = models.TextField()

    def create_user_profile(sender, instance, created, **kwargs):
        if created:
            UserProfile.objects.create(user=instance)

    post_save.connect(create_user_profile, sender=User)

settings.py

AUTH_PROFILE_MODULE = 'blog.UserProfile'

And, since I'm using python-social-auth for the authentication, I'm implementing a custom pipeline to store the image url of the user in the UserProfile.

from blog.models import UserProfile

def get_profile_picture(
    strategy,
    user,
    response,
    details,
    is_new=False,
    *args,
    **kwargs
    ):
    img_url = 'http://graph.facebook.com/%s/picture?type=large' \
        % response['id']
    profile = UserProfile.objects.get_or_create(user = user)
    profile.photo = img_url
    profile.save()

But I'm getting following error: 'tuple' object has no attribute 'photo'

I know the UserProfile has the attribute "photo" because this is the definition of that table:

table|blog_userprofile|blog_userprofile|122|CREATE TABLE "blog_userprofile" (
    "id" integer NOT NULL PRIMARY KEY,
    "user_id" integer NOT NULL UNIQUE REFERENCES "auth_user" ("id"),
    "photo" text NOT NULL
)

What it's wrong with my code then?

Answer 1

As the error states, your profile variable is a tuple, not a UserProfile instance. That is because get_or_create returns a tuple of (instance, created).