public async Task <CommentDTO> LikeComment(string id)
        {
            var exit = await _commentRepository.Get(id);

            if (exit != null)
            {
                var comment = await _commentRepository.AddCommentLike(id);

                var dto = Mapper.Map <Comment, CommentDTO>(comment);
                return(dto);
            }
            else
            {
                throw new BusinessException(ResultCode.BADREQUEST, "评论不存在");
            }
        }