def METHOD_NAME(self, request, article_slug=None):
    profile = self.request.user.profile
    serializer_context = {'request': request}
    try:
        article = Article.objects.get(slug=article_slug)
    except Article.DoesNotExist:
        raise NotFound('An article with this slug was not found.')
    profile.unfavorite(article)
    serializer = self.serializer_class(article, context=serializer_context)
    return Response(serializer.data, status=status.HTTP_200_OK)