gutter-django blows up when you double register an attribute on a subclass

[NorthIsUp]

boom

class FlaskRequestArguments(arguments.Container):

    ip_address = arguments.String(lambda self: self.input.remote_addr)



class TempestRequestArguments(FlaskRequestArguments):

    def get_forum_from_request(self):
        referrer = urlparse(self.input.referrer)
        referrer_qs = parse_qs(referrer.query)
        forum = referrer_qs.get('f', None)
        return forum

    country_code = arguments.String(lambda self: cc_for_request(current_app.geoip))
    forum = arguments.String(get_forum_from_request)
    is_mobile = arguments.Boolean(lambda self: is_mobile_request())

registry.arguments.register(FlaskRequestArguments.ip_address)
registry.arguments.register(TempestRequestArguments.country_code)
registry.arguments.register(TempestRequestArguments.forum)
registry.arguments.register(TempestRequestArguments.ip_address)
registry.arguments.register(TempestRequestArguments.is_mobile)