diff --git a/Gemfile b/Gemfile
index 7909cb17..6cf60e0e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -55,6 +55,7 @@ gem 'chinese_pinyin'
 # gem 'sunspot'
 # gem 'progress_bar'
 gem  'ansi'
+gem 'diff-lcs', '~> 1.3'
 
 gem 'kaminari'
 gem 'elasticsearch-model'
diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index 289c122b..304fcb7d 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -2017,10 +2017,10 @@ class StudentWorkController < ApplicationController
     if @homework.homework_type == 1 #普通作业
       if @homework.anonymous_comment ==0
         sheet1.row(0).concat([l(:excel_user_id),l(:excel_user_name),l(:excel_nickname),l(:excel_student_id),l(:excel_mail),l(:excel_course_group),l(:excel_homework_des),
-                            l(:excel_t_score),l(:excel_ta_score), l(:excel_n_score),l(:excel_a_penalty),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time)])
+                            l(:excel_t_score),l(:excel_ta_score), l(:excel_n_score),l(:excel_a_penalty),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time), "评语"])
       else
         sheet1.row(0).concat([l(:excel_user_id),l(:excel_user_name),l(:excel_nickname),l(:excel_student_id),l(:excel_mail),l(:excel_course_group),l(:excel_homework_des),
-                              l(:excel_t_score),l(:excel_ta_score),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time)])
+                              l(:excel_t_score),l(:excel_ta_score),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time), "评语"])
       end
       count_row = 1
       items.each do |homework|
@@ -2039,10 +2039,12 @@ class StudentWorkController < ApplicationController
           sheet1[count_row,11] = (@homework.teacher_priority == 1 && !homework.teacher_score.nil?) ? 0 : homework.late_penalty
           sheet1[count_row,12] = homework.respond_to?("work_score") ? homework.work_score.nil? ? l(:label_without_score) : homework.work_score.round(1) : l(:label_without_score)
           sheet1[count_row,13] = format_time(homework.update_time)
+          sheet1[count_row,14] = work_comment(homework)
         else
           sheet1[count_row,9] = (@homework.teacher_priority == 1 && !homework.teacher_score.nil?) ? 0 : homework.late_penalty
           sheet1[count_row,10] = homework.respond_to?("work_score") ? homework.work_score.nil? ? l(:label_without_score) : homework.work_score.round(1) : l(:label_without_score)
           sheet1[count_row,11] = format_time(homework.update_time)
+          sheet1[count_row,12] = work_comment(homework)
         end
         count_row += 1
       end
@@ -2082,10 +2084,10 @@ class StudentWorkController < ApplicationController
     elsif @homework.homework_type == 3 #分组作业
       if @homework.anonymous_comment ==0
         sheet1.row(0).concat([l(:excel_group),l(:excel_group_member),l(:excel_course_group),l(:excel_homework_des),
-                              l(:excel_t_score),l(:excel_ta_score),l(:excel_n_score),l(:excel_a_penalty),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time)])
+                              l(:excel_t_score),l(:excel_ta_score),l(:excel_n_score),l(:excel_a_penalty),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time), "评语"])
       else
         sheet1.row(0).concat([l(:excel_group),l(:excel_group_member),l(:excel_course_group),l(:excel_homework_des),
-                              l(:excel_t_score),l(:excel_ta_score),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time)])
+                              l(:excel_t_score),l(:excel_ta_score),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time), "评语"])
       end
       count_row = 1
       items.each do |homework|
@@ -2101,16 +2103,18 @@ class StudentWorkController < ApplicationController
           sheet1[count_row,8] = (@homework.teacher_priority == 1 && !homework.teacher_score.nil?) ? 0 : homework.late_penalty
           sheet1[count_row,9] = homework.respond_to?("work_score") ? homework.work_score.nil? ? l(:label_without_score) : homework.work_score.round(1) : l(:label_without_score)
           sheet1[count_row,10] = format_time(homework.update_time)
+          sheet1[count_row,11] = work_comment(homework)
         else
           sheet1[count_row,6] = (@homework.teacher_priority == 1 && !homework.teacher_score.nil?) ? 0 : homework.late_penalty
           sheet1[count_row,7] = homework.respond_to?("work_score") ? homework.work_score.nil? ? l(:label_without_score) : homework.work_score.round(1) : l(:label_without_score)
           sheet1[count_row,8] = format_time(homework.update_time)
+          sheet1[count_row,9] = work_comment(homework)
         end
         count_row += 1
       end
     elsif @homework.homework_type == 4 #实训作业
       sheet1.row(0).concat([l(:excel_user_id),l(:excel_user_name),l(:excel_nickname),l(:excel_student_id),l(:excel_mail),l(:excel_course_group),l(:excel_homework_complete_time),
-                            l(:excel_homework_complete_status), l(:excel_homework_evaluate_times), l(:excel_homework_spend_time),l(:excel_homework_total_exp),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time)])
+                            l(:excel_homework_complete_status), l(:excel_homework_evaluate_times), l(:excel_homework_spend_time),l(:excel_homework_total_exp),l(:excel_l_penalty),l(:excel_f_score),l(:excel_update_time), "评语"])
       count_row = 1
       shixun = @homework.homework_commons_shixuns.shixun
       items.each do |homework|
@@ -2129,6 +2133,7 @@ class StudentWorkController < ApplicationController
         sheet1[count_row,11] = homework.late_penalty
         sheet1[count_row,12] = homework.respond_to?("work_score") ? homework.work_score.nil? ? "--" : homework.work_score.round(1) : "--"
         sheet1[count_row,13] = homework.update_time ? format_time(homework.update_time) : "--"
+        sheet1[count_row,14] = work_comment(homework)
         count_row += 1
       end
 
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 64e7aa86..4fae7ff7 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -4178,7 +4178,8 @@ class UsersController < ApplicationController
 
   ###add by huang
   def user_watchlist
-    watch_query = User.watched_by(@user.id)
+    watch_query = User.joins('left join watchers on watchers.watchable_id = users.id and watchers.watchable_type in ("Principal", "User")')
+                    .where('watchers.user_id = ?', @user.id)
     @user_watchlist_count = watch_query.size
     @user_watchlist = watch_query.order("#{Watcher.table_name}.id desc")
     @limit = 10
@@ -4191,7 +4192,8 @@ class UsersController < ApplicationController
 
   ###add by huang
   def user_fanslist
-    fan_query = @user.watcher_users
+    fan_query = User.joins('left join watchers on watchers.user_id = users.id and watchers.watchable_type in ("Principal", "User")')
+                  .where('watchers.watchable_id = ?', @user.id)
     @user_fanlist_count = fan_query.size
     @user_fanlist = fan_query.order("#{Watcher.table_name}.id desc")
 
@@ -4204,10 +4206,12 @@ class UsersController < ApplicationController
   end
 
   def user_wathlist_and_fanslist
-    watch_query = User.watched_by(@user.id)
+    watch_query = User.joins('left join watchers on watchers.watchable_id = users.id and watchers.watchable_type in ("Principal", "User")')
+                    .where('watchers.user_id = ?', @user.id)
     @user_watchlist_count = watch_query.count
     @user_watchlist = watch_query.order("#{Watcher.table_name}.id desc")
-    fan_query = @user.watcher_users
+    fan_query = User.joins('left join watchers on watchers.user_id = users.id and watchers.watchable_type in ("Principal", "User")')
+                  .where('watchers.watchable_id = ?', @user.id)
     @user_fanlist_count = fan_query.count
     @user_fanlist = fan_query.order("#{Watcher.table_name}.id desc")
     respond_to do |format|
diff --git a/app/helpers/student_work_helper.rb b/app/helpers/student_work_helper.rb
index 94b8348d..cda73147 100644
--- a/app/helpers/student_work_helper.rb
+++ b/app/helpers/student_work_helper.rb
@@ -3,6 +3,17 @@ include UserScoreHelper
 
 module StudentWorkHelper
 
+  # 作品的评语(拼接，导出excel成绩)
+  def work_comment work
+    comment = ""
+    work_scores = work.student_works_scores.order("created_at desc")
+    work_scores.each do |score|
+      comment += "#{score.user.show_real_name}： #{format_time(score.created_at)}  #{score.score} 分\n"
+      comment += "#{score.comment}\n\n"
+    end
+    comment
+  end
+
   #获取当前用户的项目列表
   def user_projects_option
     projects = User.current.projects.visible
diff --git a/app/views/users/_user_fans_or_watch.html.erb b/app/views/users/_user_fans_or_watch.html.erb
index 898b3d2e..0044cb65 100644
--- a/app/views/users/_user_fans_or_watch.html.erb
+++ b/app/views/users/_user_fans_or_watch.html.erb
@@ -13,7 +13,7 @@
 </div>
 <% if user != User.current %>
 <div class="fr">
-  <% if(user.watched_by?(User.current)) %>
+  <% if Watcher.where(user_id: User.current.id, watchable_id: user.id, watchable_type: %w(Principal User)).exists? %>
     <%= link_to "取消关注",
                 unwatch_path(:object_type => 'user', :object_id => user.id, :target_id => @user.id, :action_name => action),
                 :class => "user_default_btn user_private_btn fl mr30 mt20",