def METHOD_NAME(self, questionanswer):
    return settings.BASE_ABS_URL + resolve_url(
        'offering:quiz:submitted_file',
        course_slug=self.question.quiz.activity.offering.slug,
        activity_slug=self.question.quiz.activity.slug,
        userid=questionanswer.student.person.userid_or_emplid(),
        answer_id=questionanswer.id,
        secret=questionanswer.answer['data'].get('secret', '?')
    )