private void AddComment(UpdateWeekComment updateWeekComment, Guid accountId)
 {
     using (var workContext = new DefaultContext())
     {
         var weekTarget = workContext.WeekTargets.FirstOrDefault(x => x.ID == updateWeekComment.WeekTargetId);
         if (weekTarget.Null())
         {
             Message = "评论日志不存在";
             return;
         }
         var weekComment = updateWeekComment.CreateWeekComment(weekTarget, accountId);
         workContext.WeekComments.Add(weekComment);
         workContext.SaveChanges();
         Flag = true;
     }
 }