diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index 39d793b5a..6eaa22f01 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -1385,7 +1385,7 @@ class ExercisesController < ApplicationController
           @paging_type = params[:sort].to_s
         end
 
-        ques_result_all = exercise_commit_result(@exercise_questions,@exercise_commit_user_ids,@exercise_commit_users)
+        ques_result_all = exercise_commit_result(@exercise_questions,@exercise_commit_user_ids)
 
         if @paging_type == "percent"
           @question_result_hash = ques_result_all.sort_by{|s| s[:percent]}
diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index 0cfcd5336..f5d341aae 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -84,12 +84,12 @@ module ExercisesHelper
   end
 
   #试卷的统计结果页面计算各题的
-  def exercise_commit_result(questions,user_ids,commit_users)
+  def exercise_commit_result(questions,user_ids)
     question_infos = []
     percent = 0.0
     questions.each do |ex|
       ex_total_score = user_ids.count * ex&.question_score   #该试卷的已回答的总分
-      ex_answers = ex.exercise_answers
+      ex_answers = ex.exercise_answers.includes(:exercise_choice)
       if ex.question_type != Exercise::PRACTICAL
         ques_title = ex.question_title
         ques_less_title = nil
@@ -115,12 +115,13 @@ module ExercisesHelper
         right_users_count = 0  #该问题的回答正确的人数
 
         #计算每个问题的答案人数
-        commit_users.transaction do
-          commit_users.each do |user|
-            answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).where(user_id:user.user_id)&.map {|s| s.exercise_choice.choice_position}.uniq
-            if answer_choice_array.sort == standard_answer
-              right_users_count += 1
-            end
+        # commit_users.transaction do
+        #
+        # end
+        user_ids.each do |user_id|
+          answer_choice_array = effictive_users.select(:user_id,:exercise_choice_id).find(user_id:user_id)&.map {|s| s.exercise_choice.choice_position}.uniq
+          if answer_choice_array.sort == standard_answer
+            right_users_count += 1
           end
         end
         percent = effictive_users_count > 0 ? (right_users_count / effictive_users_count.to_f).round(3)*100 : 0.0
diff --git a/app/models/user_extension.rb b/app/models/user_extension.rb
index 458d31989..5a0dc8a37 100644
--- a/app/models/user_extension.rb
+++ b/app/models/user_extension.rb
@@ -3,7 +3,7 @@ class UserExtension < ApplicationRecord
   enum identity: { teacher: 0, student: 1, professional: 2, developer: 3 }
 
   belongs_to :user, touch: true
-  belongs_to :school
+  belongs_to :school, optional: true
   belongs_to :department, optional: true
 
   def identity_text