diff --git a/app/controllers/student_work_controller.rb b/app/controllers/student_work_controller.rb
index e0afc38ae..e6ff904f3 100644
--- a/app/controllers/student_work_controller.rb
+++ b/app/controllers/student_work_controller.rb
@@ -98,14 +98,22 @@ class StudentWorkController < ApplicationController
       elsif @homework.homework_detail_manual.comment_status == 1  #学生 && 未开启匿评 只看到自己的
         if @homework.homework_type == 3
           pro = @homework.student_work_projects.where(:user_id => User.current.id).first
-          @stundet_works = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          if pro.nil?
+            @stundet_works = []
+          else
+            @stundet_works = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          end
         else
           @stundet_works = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:user_id => User.current.id)
         end
       elsif @homework.homework_detail_manual.comment_status == 2  #学生 && 开启匿评  看到匿评列表
         if @homework.homework_type == 3
           pro = @homework.student_work_projects.where(:user_id => User.current.id).first
-          my_work = @homework.student_works.where(:id => pro.student_work_id)
+          if pro.nil?
+            my_work = []
+          else
+            my_work = @homework.student_works.where(:id => pro.student_work_id)
+          end
         else
           my_work = @homework.student_works.where(:user_id => User.current.id)
         end
@@ -113,7 +121,11 @@ class StudentWorkController < ApplicationController
       elsif @homework.homework_detail_manual.comment_status == 3  #学生 && 关闭匿评  未提交作品之前列表为空，提交了作品看到所有的
         if @homework.homework_type == 3
           pro = @homework.student_work_projects.where(:user_id => User.current.id).first
-          my_work = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          if pro.nil?
+            my_work = []
+          else
+            my_work = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          end
         else
           my_work = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:user_id => User.current.id)
         end
@@ -134,14 +146,22 @@ class StudentWorkController < ApplicationController
       elsif @homework.homework_detail_manual.comment_status == 1  #学生 && 未开启匿评 只看到自己的
         if @homework.homework_type == 3
           pro = @homework.student_work_projects.where(:user_id => User.current.id).first
-          @stundet_works = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          if pro.nil?
+            @stundet_works = []
+          else
+            @stundet_works = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          end
         else
           @stundet_works = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:user_id => User.current.id)
         end
       elsif @homework.homework_detail_manual.comment_status == 2  #学生 && 开启匿评  看到匿评列表
         if @homework.homework_type == 3
           pro = @homework.student_work_projects.where(:user_id => User.current.id).first
-          my_work = @homework.student_works.where(:id => pro.student_work_id)
+          if pro.nil?
+            my_work = []
+          else
+            my_work = @homework.student_works.where(:id => pro.student_work_id)
+          end
         else
           my_work = @homework.student_works.where(:user_id => User.current.id)
         end
@@ -149,7 +169,11 @@ class StudentWorkController < ApplicationController
       elsif @homework.homework_detail_manual.comment_status == 3  #学生 && 关闭匿评  未提交作品之前列表为空，提交了作品看到所有的
         if @homework.homework_type == 3
           pro = @homework.student_work_projects.where(:user_id => User.current.id).first
-          my_work = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          if pro.nil?
+            my_work = []
+          else
+            my_work = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:id => pro.student_work_id)
+          end
         else
           my_work = @homework.student_works.select("student_works.*,IF(final_score is null,null,final_score - absence_penalty - late_penalty) as score").where(:user_id => User.current.id)
         end