How do I pull information from a field in the admin panel?

I am currently working with Django 1.8 and Python 3. I'm using Python-social-auth to let people sign in via steam id and I'm using the SOCIAL_AUTH_STEAM_EXTRA_DATA = ['player'] setting. In the admin panel you get an field that says Extra Data. And it stores info like this

{"player": {"profileurl": "http://steamcommunity.com/profiles/76561198039465340/", "personaname": "Khailz | Daisuki <3", "avatarmedium": "https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/9c/9cce70b919de60669303d057446fbf563221133a_medium.jpg", "steamid": "76561198039465340", "avatarfull": "https://steamcdn-a.akamaihd.net/steamcommunity/public/images/avatars/9c/9cce70b919de60669303d057446fbf563221133a_full.jpg"}}

What I want to do is pull the avatarfull data and put it in my template when a user is logged in.

I have currently tried things like <p>{{ user.get_user_details.avatarfull }}</p> in my login.html and any other combination trying to pull this specific field. I'm not sure how to go about this, how do I pick this field out if it is backend and not in the models.py? I know I'm going about this wrong could someone point me in the right direction?

Solution

Untested, but I think the correct path is:

user.social_auth.get(
    provider='steam'
).extra_data.player.avatarfull

Which isn't very convenient, so you might want to add a property to your User object:

models:

class MyUser(models.Model):
    # regular stuff

    @property
    def get_avatar_url(self):
        try:
            return self.social_auth.get(
                provider='steam'
            ).extra_data.player.avatarfull
        except (UserSocialAuth.DoesNotExist, AttributeError):
            return 'http://placehold.it/64x64'

templates:

<img src="{{ user.get_avatar_url }}" />

If you haven't declared a custom user object, you could just as easily create a templatetag or stand alone helper function to retrieve the avatar from an user.

templatetag:

@register.filter
def get_avatar_url(user):
    try:
        return user.social_auth.get(
            provider='steam'
        ).extra_data.player.avatarfull
    except (UserSocialAuth.DoesNotExist, AttributeError):
        return 'http://placehold.it/64x64'

templates:

<img src="{{ user|get_avatar_url }}" />