How can I handle Exceptions raised by dango-social-auth?

In django-social-auth, there are a few instances where a back-end will raise a ValueError (such as when a user cancels a login request or if a user tries to associate with an account that's already been associated with another User). If a User runs into one of these scenarios, they'll be presented with a 500 error on your site.

So, what's the best way to catch these? I'd prefer to be able to display a useful message (via the messages framework) when this happens, but I'm at a loss as to the best way to do this.

I'm thinking about writing my own view (in a separate app) that just wraps social_auth's associate_complete view, but this seems clunky... Any ideas?

I could fork django-social-auth and customize this behavior, but I'd prefer not to maintain a separate fork - especially since I can't assume everone would want to handle these Exceptions in the same manner.

I've ecountered the same problem and it seems, that creating wrapper view is the best way to handle this situation, at this point, atleast. Here is how I had mine done:

def social_auth_login(request, backend):
    """
        This view is a wrapper to social_auths auth
        It is required, because social_auth just throws ValueError and gets user to 500 error
        after every unexpected action. This view handles exceptions in human friendly way.
        See https://convore.com/django-social-auth/best-way-to-handle-exceptions/
    """
    from social_auth.views import auth

    try:
        # if everything is ok, then original view gets returned, no problem
        return auth(request, backend)
    except ValueError, error:
        # in case of errors, let's show a special page that will explain what happened
        return render_to_response('users/login_error.html',
                                  locals(),
                                  context_instance=RequestContext(request))

You will have to setup url for it:

urlpatterns = patterns('',
    # ...
    url(r'^social_auth_login/([a-z]+)$',  social_auth_login, name='users-social-auth-login'), 
)

And then use it as before in template:

<a href="{% url 'users-social-auth-login' "google" %}">Log in with Google</a>

Hope this helps, even aftern two months after question was asked :)