public ResponseEntity <string> Follow(Follow follow)
        {
            ResponseEntity <string> response = new ResponseEntity <string>();

            var  dao     = new FollowDao(ConfigurationManager.AppSettings["mysqlConnStr"]);
            bool success = dao.Add(follow);

            if (success)
            {
                response = new ResponseEntity <string>(true, "关注成功", "关注成功");
            }
            else
            {
                response = new ResponseEntity <string>(true, "关注失败", "关注失败");
            }
            return(response);
        }
        public void FollowByPost(string postId, string followerId)
        {
            var graphicMessageDao = new GraphicMessageDao(ConfigurationManager.AppSettings["mysqlConnStr"]);
            var graphicMsg        = graphicMessageDao.GetById(postId);

            if (graphicMsg != null && !string.IsNullOrEmpty(graphicMsg.openId))
            {
                var followDao = new FollowDao(ConfigurationManager.AppSettings["mysqlConnStr"]);

                bool isFollowed = followDao.GetFollowed(graphicMsg.openId, followerId);

                if (!isFollowed)
                {
                    followDao.Add(new dataentity.Model.Follow()
                    {
                        followee = graphicMsg.openId, follower = followerId
                    });
                }
            }
        }