def dump_links(self, o):
        """Dump links."""
        return {
            'self': url_for('.bucket_api', bucket_id=o.id, _external=True),
            'versions': url_for(
                '.bucket_api', bucket_id=o.id, _external=True) + '?versions',
            'uploads': url_for(
                '.bucket_api', bucket_id=o.id, _external=True) + '?uploads',
        }