diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 10332752..2175aa3e 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -2437,8 +2437,8 @@ class CoursesController < ApplicationController
       sheet1[count_row,column+=1] = member.course_group_id == 0 ? "暂无" : member.course_group.name
       # current_col = 5
       shixun_score = 0
-      homeworks.where(:homework_type => 4).includes(:student_works).each do |homework|
-        student_works = homework.student_works.where("user_id = #{member.user.id}")
+      homeworks.where(:homework_type => 4).includes(:score_student_works).each do |homework|
+        student_works = homework.score_student_works.select{|work| work.user_id == member.user.id}
         if student_works.empty?
           sheet1[count_row,column+=1] = 0
         else
@@ -2449,8 +2449,8 @@ class CoursesController < ApplicationController
         # current_col += 1
       end
       common_score = 0
-      homeworks.where(:homework_type => 1).includes(:student_works).each do |homework|
-        student_works = homework.student_works.where("user_id = #{member.user.id}")
+      homeworks.where(:homework_type => 1).includes(:score_student_works).each do |homework|
+        student_works = homework.score_student_works.select{|work| work.user_id == member.user.id}
         if student_works.empty?
           sheet1[count_row,column+=1] = 0
         else
@@ -2461,8 +2461,8 @@ class CoursesController < ApplicationController
         # current_col += 1
       end
       group_score = 0
-      homeworks.where(:homework_type => 3).includes(:student_works).each do |homework|
-        student_works = homework.student_works.where("user_id = #{member.user.id}")
+      homeworks.where(:homework_type => 3).includes(:score_student_works).each do |homework|
+        student_works = homework.score_student_works.select{|work| work.user_id == member.user.id}
         if student_works.empty?
           sheet1[count_row,column+=1] = 0
         else
@@ -2473,8 +2473,8 @@ class CoursesController < ApplicationController
         # current_col += 1
       end
       exercise_score = 0
-      exercises.includes(:exercise_users).each do |exercise|
-        exercise_user = exercise.exercise_users.where("user_id = #{member.user.id}")
+      exercises.includes(:score_exercise_users).each do |exercise|
+        exercise_user = exercise.score_exercise_users.select{|work| work.user_id == member.user.id}
         if exercise_user.empty?
           sheet1[count_row,column+=1] = 0
         else
@@ -2562,7 +2562,7 @@ class CoursesController < ApplicationController
       count_row += 1
     end
 
-    homeworks.where(:homework_type => 4).includes(:score_student_works).each_with_index do |home, i|
+    homeworks.where(:homework_type => 4).each_with_index do |home, i|
       sheet = book.create_worksheet :name => "#{home.name}"
       sheet[0,0] = "课程编号"
       sheet[0,1] = course.id
@@ -2596,7 +2596,7 @@ class CoursesController < ApplicationController
       end
     end
 
-    homeworks.where(:homework_type => 1).includes(:score_student_works).each_with_index do |home, i|
+    homeworks.where(:homework_type => 1).each_with_index do |home, i|
       sheet = book.create_worksheet :name => "普通作业第#{i+1}次"
       sheet[0,0] = "课程编号"
       sheet[0,1] = course.id
@@ -2643,7 +2643,7 @@ class CoursesController < ApplicationController
 
     end
 
-    homeworks.where(:homework_type => 3).includes(:score_student_works).each_with_index do |home, i|
+    homeworks.where(:homework_type => 3).each_with_index do |home, i|
       sheet = book.create_worksheet :name => "分组作业第#{i+1}次"
       sheet[0,0] = "课程编号"
       sheet[0,1] = course.id
@@ -2691,7 +2691,7 @@ class CoursesController < ApplicationController
       end
     end
 
-    exercises.includes(:score_exercise_users).each_with_index do |exercise, i|
+    exercises.each_with_index do |exercise, i|
       sheet = book.create_worksheet :name => "试卷第#{i+1}次"
       sheet[0,0] = "课程编号"
       sheet[0,1] = course.id
diff --git a/app/models/exercise.rb b/app/models/exercise.rb
index f82b6047..cb65c5ce 100644
--- a/app/models/exercise.rb
+++ b/app/models/exercise.rb
@@ -7,7 +7,7 @@ class Exercise < ActiveRecord::Base
   has_many :exercise_group_settings, :dependent => :destroy
   has_many :exercise_questions, :dependent => :destroy,:order => "#{ExerciseQuestion.table_name}.question_number"
   has_many :exercise_users, :dependent => :destroy, :conditions => "exercise_users.is_delete = 0"
-  has_many :score_exercise_users, :conditions => "exercise_users.is_delete = 0 and commit_status != 0", :order => "exercise_users.score desc"
+  has_many :score_exercise_users, :class_name => "ExerciseUser", :conditions => "exercise_users.is_delete = 0 and commit_status != 0", :order => "exercise_users.score desc"
   has_many :users, :through => :exercise_users #该测试被哪些用户提交答案过
   has_many :course_acts, :class_name => 'CourseActivity',:as =>:course_act ,:dependent => :destroy
 # 课程消息