diff --git a/app/controllers/graduation_tasks_controller.rb b/app/controllers/graduation_tasks_controller.rb
index c3b73ad20..9b62f7dbd 100644
--- a/app/controllers/graduation_tasks_controller.rb
+++ b/app/controllers/graduation_tasks_controller.rb
@@ -37,7 +37,7 @@ class GraduationTasksController < ApplicationController
     @all_count = @course.graduation_tasks.size
     @published_count = @course.graduation_tasks.where("publish_time <= '#{Time.now}'").size
     @task_count = @tasks.size
-    @tasks = @tasks.reorder("#{default_order}").page(page).per(15).includes(:graduation_works, course: [course_members: :teacher_course_groups])
+    @tasks = @tasks.reorder("#{default_order}").page(page).per(15).includes(:graduation_works)
   end
 
   # 任务问答
@@ -72,7 +72,7 @@ class GraduationTasksController < ApplicationController
 
       @work_list = @task.graduation_works.where(user_id: user_ids).includes(user: [:user_extension])
       @all_work_count = @work_list.count
-      @teachers = @course.teachers.where.not(user_id: current_user.id)
+      @teachers = @course.teachers.where.not(user_id: current_user.id).includes(:user)
       # 教师评阅搜索 0: 未评， 1 已评
       unless params[:teacher_comment].blank?
         graduation_work_ids = GraduationWorkScore.where(graduation_work_id: @work_list.map(&:id)).pluck(:graduation_work_id)
@@ -110,9 +110,9 @@ class GraduationTasksController < ApplicationController
       end
 
       # 排序
-      rorder = params[:order].blank? ? "updated_at" : params[:order]
+      rorder = params[:order].blank? ? "update_time" : params[:order]
       b_order = params[:b_order].blank? ? "desc" : params[:b_order]
-      if rorder == "created_at" || rorder == "work_score"
+      if rorder == "update_time" || rorder == "work_score"
         @work_list = @work_list.order("graduation_works.#{rorder} #{b_order}")
       elsif rorder == "student_id"
         @work_list = @work_list.joins(user: :user_extension).order("user_extensions.#{rorder} #{b_order}")
@@ -123,6 +123,8 @@ class GraduationTasksController < ApplicationController
       @work_count = @work_list.count
       @work_excel = @work_list
       @work_list = @work_list.page(page).per(limit)
+      @students = @course.students
+      @assign_power = @user_course_identity < Course::STUDENT && @task.cross_comment && @task.comment_status == 2
 
       if params[:format] == "xlsx"
         complete_works = @work_excel.where("work_status > 0").size
diff --git a/app/controllers/subjects_controller.rb b/app/controllers/subjects_controller.rb
index bb7059af6..20b28121f 100644
--- a/app/controllers/subjects_controller.rb
+++ b/app/controllers/subjects_controller.rb
@@ -22,17 +22,17 @@ class SubjectsController < ApplicationController
     # 最热排序
     if reorder == "myshixun_count"
       if select
-        @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
-                            subjects.shixuns_count, COUNT(myshixuns.id) AS myshixun_member_count FROM myshixuns, stage_shixuns, subjects
-                            WHERE myshixuns.shixun_id = stage_shixuns.shixun_id AND stage_shixuns.subject_id = subjects.id
-                            AND `subjects`.`hidden` = 0 AND `subjects`.`status` = 2 AND `subjects`.`name` like '%#{search}%'
-                            AND `subjects`.`repertoire_id` = #{select} GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
+        @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.user_id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
+                      subjects.shixuns_count, sum(shixuns.myshixuns_count) AS myshixun_member_count FROM subjects join stage_shixuns
+                      on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id where
+                      subjects`.`hidden` = 0 AND `subjects`.`status` = 2 AND `subjects`.`name` like '%#{search}%'
+                      AND `subjects`.`repertoire_id` = #{select} GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
       else
-        @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
-                            subjects.shixuns_count, COUNT(myshixuns.id) AS myshixun_member_count FROM myshixuns, stage_shixuns, subjects
-                            WHERE myshixuns.shixun_id = stage_shixuns.shixun_id AND stage_shixuns.subject_id = subjects.id
-                            AND `subjects`.`hidden` = 0 AND `subjects`.`status` = 2 AND `subjects`.`name` like '%#{search}%'
-                            GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
+        @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.user_id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
+                      subjects.shixuns_count, sum(shixuns.myshixuns_count) AS myshixun_member_count FROM subjects join stage_shixuns
+                      on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id where
+                      `subjects`.`hidden` = 0 AND `subjects`.`status` = 2 AND `subjects`.`name` like '%#{search}%'
+                      GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
       end
     else
       # 我的路径
@@ -65,9 +65,11 @@ class SubjectsController < ApplicationController
     @total_count = @subjects.size
 
     if reorder != "myshixun_count"
-      @subjects = @subjects.page(page).per(limit).includes(:shixuns)
+      @subjects = @subjects.page(page).per(limit).includes(:shixuns, :repertoire)
     else
       @subjects = @subjects[offset, limit]
+      subject_ids = @subjects.pluck(:id)
+      @subjects = Subject.where(id: subject_ids).order("field(id,#{subject_ids.join(',')})").includes(:shixuns, :repertoire)
     end
   end
 
diff --git a/app/helpers/graduation_tasks_helper.rb b/app/helpers/graduation_tasks_helper.rb
index b9039544d..2bc059a55 100644
--- a/app/helpers/graduation_tasks_helper.rb
+++ b/app/helpers/graduation_tasks_helper.rb
@@ -67,7 +67,7 @@ module GraduationTasksHelper
   # 作品数统计：type： 1 已提交  0 未提交
   def grduationwork_count task, type
    works = task.graduation_works
-   type == 1 ? works.where("work_status !=?", 0).size : works.where("work_status =?", 0).size
+   type == 1 ? works.select{|work| work.work_status != 0}.size : works.select{|work| work.work_status == 0}.size
   end
 
   # 普通/分组 作业作品状态数组
diff --git a/app/models/graduation_work.rb b/app/models/graduation_work.rb
index 093e409a9..235bfcac6 100644
--- a/app/models/graduation_work.rb
+++ b/app/models/graduation_work.rb
@@ -68,7 +68,7 @@ class GraduationWork < ApplicationRecord
 
   # 作品是否能够分配指导老师
   def assign_power?(course_identity)
-    course_identity < Course::STUDENT && self.graduation_task.cross_comment.present? && self.graduation_task.comment_status == 2
+    course_identity < Course::STUDENT && graduation_task.cross_comment && graduation_task.comment_status == 2
   end
 
   # 老师评阅分
diff --git a/app/models/subject.rb b/app/models/subject.rb
index ced610377..66ac41c40 100644
--- a/app/models/subject.rb
+++ b/app/models/subject.rb
@@ -31,7 +31,7 @@ class Subject < ApplicationRecord
 
   # 挑战过路径的成员数
   def member_count
-    shixuns.sum(:myshixuns_count)
+    shixuns.pluck(:myshixuns_count).sum
   end
 
   def all_score
diff --git a/app/views/graduation_tasks/index.json.jbuilder b/app/views/graduation_tasks/index.json.jbuilder
index 7fcececd9..a6540555d 100644
--- a/app/views/graduation_tasks/index.json.jbuilder
+++ b/app/views/graduation_tasks/index.json.jbuilder
@@ -1,10 +1,6 @@
 json.course_identity @identity
 json.course_public @course.is_public == 1
 json.is_end @course.is_end
-json.all_count @all_count
-json.published_count @published_count
-json.unpublished_count @all_count - @published_count
-json.task_count @task_count
 
 json.tasks @tasks.each do |task|
   # task_private = @identity > Course::STUDENT && !task.is_public
@@ -29,3 +25,7 @@ json.tasks @tasks.each do |task|
   end
 end
 
+json.all_count @all_count
+json.published_count @published_count
+json.unpublished_count @all_count - @published_count
+json.task_count @task_count
diff --git a/app/views/graduation_tasks/tasks_list.json.jbuilder b/app/views/graduation_tasks/tasks_list.json.jbuilder
index 7588b6b6e..ac5aa050e 100644
--- a/app/views/graduation_tasks/tasks_list.json.jbuilder
+++ b/app/views/graduation_tasks/tasks_list.json.jbuilder
@@ -34,6 +34,7 @@ if @task.published? || @user_course_identity < Course::STUDENT
     json.work_count @work_count
     json.all_work_count @all_work_count
   end
+
 # 学生数据
   json.work_lists do
     json.array! @work_list do |work|
@@ -41,7 +42,7 @@ if @task.published? || @user_course_identity < Course::STUDENT
       json.user_id work.user.id
       json.name work.user.real_name
       json.student_id work.user.student_id
-      json.class_grouping_name work.class_grouping_name
+      json.class_grouping_name @students.select{|student| student.user_id == work.user_id}.first.try(:course_group_name)
       json.ultimate_score work.ultimate_score
       if @task.have_grouping?
         json.grouping_name work.grouping_name
@@ -58,7 +59,7 @@ if @task.published? || @user_course_identity < Course::STUDENT
       end
       json.late_penalty work.late_penalty if @task.allow_late
       json.final_score work_final_score work, @current_user, @user_course_identity
-      json.assign work.assign_power?(@user_course_identity)
+      json.assign @assign_power
       json.view_work @view_work || @current_user.id == work.user_id
     end
   end