diff --git a/app/controllers/exercises_controller.rb b/app/controllers/exercises_controller.rb
index 2175108fc..f10bc81ff 100644
--- a/app/controllers/exercises_controller.rb
+++ b/app/controllers/exercises_controller.rb
@@ -12,10 +12,10 @@ class ExercisesController < ApplicationController
   before_action :get_exercise_question_counts,only: [:show,:edit,:start_answer,:review_exercise,:blank_exercise,:export_exercise]
   before_action :validate_publish_time,only: [:commit_setting] #提交设置时，需判断时间是否符合
   before_action :check_course_public,only: [:set_public]
-  before_action :check_user_on_answer,only: [:show,:start_answer,:commit_exercise,:exercise_lists] #判断当前用户在试卷的权限/老师是否属于分班的权限
+  before_action :check_user_on_answer,only: [:show,:start_answer,:exercise_lists] #判断当前用户在试卷的权限/老师是否属于分班的权限
   before_action :only_student_in,only: [:start_answer]
   before_action :check_user_id_start_answer,only: [:start_answer,:review_exercise]
-  before_action :commit_user_exercise,only: [:start_answer,:exercise_lists,:review_exercise]   #判断试卷时间到用户是否提交
+  # before_action :commit_user_exercise,only: [:start_answer,:exercise_lists,:review_exercise]   #已有定时的任务
   before_action :check_exercise_time,only: [:commit_exercise] #提交试卷时，判断时间是否超过
   before_action :check_exercise_status,only: [:redo_modal,:redo_exercise]
   before_action :check_exercise_is_end, only: [:review_exercise]
@@ -1006,6 +1006,7 @@ class ExercisesController < ApplicationController
   def start_answer
     ActiveRecord::Base.transaction do
       begin
+        @exercise_user_current = @exercise.exercise_users.exercise_commit_users(@exercise_current_user_id)&.first
         if @exercise_user_current.blank?
           if @user_course_identity > Course::ASSISTANT_PROFESSOR  #当为老师的时候，不创建exercise_user表，理论上老师是不能进入答题的
             exercise_user_params = {
@@ -1640,38 +1641,38 @@ class ExercisesController < ApplicationController
   end
 
   def check_exercise_time
-    @answer_committed_user = @exercise.exercise_users.exercise_commit_users(current_user.id).first
+    @answer_committed_user = @exercise.exercise_users.exercise_commit_users(current_user.id)&.first
     if @answer_committed_user.blank?
       normal_status(404,"答题用户不存在")
-    elsif @exercise.get_exercise_status(current_user.id) != 2 || @answer_committed_user.commit_status == 1   #
-      normal_status(-1,"提交错误,试卷已截止/用户已提交！")
+    # elsif @exercise.get_exercise_status(current_user.id) == 2 && @answer_committed_user.commit_status == 1  #当试卷截止时，会自动提交
+    #   normal_status(-1,"提交错误,试卷用户已提交！")
     end
   end
 
-  def commit_user_exercise
-    @exercise_user_current = @exercise.exercise_users.exercise_commit_users(@exercise_current_user_id).first  #查找当前用户是否有过答题
-    if @user_course_identity == Course::STUDENT
-      if @exercise_user_current.present?
-        if @exercise.time > 0 && @exercise_user_current.start_at.present?  && (@exercise_user_current.commit_status == 0) &&
-            ((@exercise_user_current.start_at + (@exercise.time.to_i + 1).minutes) < Time.now)
-          #当前用户存在，且已回答，且试卷时间已过，且未提交，则自动提交。最好是前端控制
-          objective_score = calculate_student_score(@exercise,current_user)[:total_score]
-          subjective_score = @exercise_user_current.subjective_score < 0.0 ? 0.0 : @exercise_user_current.subjective_score
-          total_score = objective_score + subjective_score
-          commit_option = {
-              :status => 1,
-              :commit_status => 1,
-              :end_at => Time.now,
-              :objective_score => objective_score,
-              :score => total_score,
-              :subjective_score => subjective_score
-          }
-          @exercise_user_current.update_attributes(commit_option)
-          normal_status(0,"已交卷成功！")
-        end
-      end
-    end
-  end
+  # def commit_user_exercise
+  #   @exercise_user_current = @exercise.exercise_users.exercise_commit_users(@exercise_current_user_id)&.first  #查找当前用户是否有过答题
+  #   if @user_course_identity == Course::STUDENT
+  #     if @exercise_user_current.present?
+  #       if @exercise.time > 0 && @exercise_user_current.start_at.present?  && (@exercise_user_current.commit_status == 0) &&
+  #           ((@exercise_user_current.start_at + (@exercise.time.to_i + 1).minutes) < Time.now)
+  #         #当前用户存在，且已回答，且试卷时间已过，且未提交，则自动提交。最好是前端控制
+  #         objective_score = calculate_student_score(@exercise,current_user)[:total_score]
+  #         subjective_score = @exercise_user_current.subjective_score < 0.0 ? 0.0 : @exercise_user_current.subjective_score
+  #         total_score = objective_score + subjective_score
+  #         commit_option = {
+  #             :status => 1,
+  #             :commit_status => 1,
+  #             :end_at => Time.now,
+  #             :objective_score => objective_score,
+  #             :score => total_score,
+  #             :subjective_score => subjective_score
+  #         }
+  #         @exercise_user_current.update_attributes(commit_option)
+  #         normal_status(0,"已交卷成功！")
+  #       end
+  #     end
+  #   end
+  # end
 
   #打回重做时的初步判断
   def check_exercise_status
diff --git a/app/controllers/student_works_controller.rb b/app/controllers/student_works_controller.rb
index f4a072a4b..7e23443d2 100644
--- a/app/controllers/student_works_controller.rb
+++ b/app/controllers/student_works_controller.rb
@@ -429,10 +429,17 @@ class StudentWorksController < ApplicationController
   def shixun_work_report
     @user = @work.user
     @shixun = @homework.shixuns.take
-    @games = @work.myshixun.games.includes(:challenge, :game_codes, :outputs) if @work.myshixun
+    # 提示： 这里如果includes outputs表的话： sum(:evaluate_count)会出现错误
+    @games = @work.myshixun.games if @work.myshixun
 
     # 用户最大评测次数
-    @user_evaluate_count = @games.sum(:evaluate_count) if @games
+    if @games
+      @user_evaluate_count = @games.sum(:evaluate_count)
+      @games = @games.includes(:challenge, :game_codes, :outputs)
+    else
+      @user_evaluate_count = 0
+    end
+
     # 图形效率图的数据
     @echart_data = student_efficiency(@homework, @work)
   end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index b4e3baf51..32c4438a6 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -128,7 +128,7 @@ module ApplicationHelper
       if source.class.to_s == 'User'
         File.join(relative_path, ["#{source.class}", "#{source.id}"])
       else
-        File.join("/images/avatars", ["#{source.class}", "#{source.id}"])
+        File.join("images/avatars", ["#{source.class}", "#{source.id}"])
       end
     elsif source.class.to_s == 'User'
       str = source.user_extension.try(:gender).to_i == 0 ? "b" : "g"
@@ -146,7 +146,7 @@ module ApplicationHelper
 
   def shixun_url_to_avatar(shixun)
     if File.exist?(disk_filename(shixun.class, shixun.id))
-      File.join("/images/#{relative_path}", "#{shixun.class}", "#{shixun.id}")
+      File.join("images/#{relative_path}", "#{shixun.class}", "#{shixun.id}")
     else
       File.join("educoder", "index", "shixun", "shixun#{rand(23)}.jpg")
     end
diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index 2a052fffe..9ea7578f2 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -353,121 +353,127 @@ module ExercisesHelper
     score5 = 0.0  #实训题
     ques_stand = []  #问题是否正确
     exercise_questions = exercise.exercise_questions.includes(:exercise_answers,:exercise_shixun_answers,:exercise_standard_answers,:exercise_shixun_challenges)
-    exercise_questions.each do |q|
-      if q.question_type != 5
-        answers_content = q.exercise_answers.search_answer_users("user_id",user.id)  #学生的答案
-      else
-        answers_content = q.exercise_shixun_answers.search_shixun_answers("user_id",user.id)  #学生的答案
-      end
-      if q.question_type <= 2  #为选择题或判断题时
-        if answers_content.present?   #学生有回答时
-          answer_choice_array = []
-          answers_content.each do |a|
-            answer_choice_array.push(a.exercise_choice.choice_position)  #学生答案的位置
-          end
-          user_answer_content = answer_choice_array.sort
-          standard_answer = q.exercise_standard_answers.pluck(:exercise_choice_id).sort  #该问题的标准答案，可能有多个
-          if user_answer_content == standard_answer  #答案一致,多选或单选才给分，答案不对不给分
-            if standard_answer.count > 0
-              q_score_1 = (q.question_score / standard_answer.count)   #当多选答案正确时，每个answer的分数均摊。
-            else
-              q_score_1 = 0.0
-            end
-            answers_content.update_all(:score => q_score_1)
-            score1 = score1 + q.question_score
-          end
+    exercise_questions&.each do |q|
+      begin
+        if q.question_type != 5
+          answers_content = q.exercise_answers.where(user_id: user.id)  #学生的答案
         else
-          score1 += 0.0
+          answers_content = q.exercise_shixun_answers.where(user_id: user.id)  #学生的答案
         end
-      elsif q.question_type == 3   #填空题
-        if answers_content.present?
-          null_standard_answer = q.exercise_standard_answers
-          standard_answer_array = null_standard_answer.select(:exercise_choice_id,:answer_text)
-          standard_answer_ids = standard_answer_array.pluck(:exercise_choice_id).reject(&:blank?).uniq   #标准答案的exercise_choice_id数组
-          standard_answer_count = standard_answer_ids.count
-          if standard_answer_count > 0  #存在标准答案时才有分数
-            q_score_2 = (q.question_score.to_f / standard_answer_count) #每一空的得分
-          else
-            q_score_2 = 0.0
-          end
-          if q.is_ordered
-            answers_content.each do |u|
-              i_standard_answer = standard_answer_array.where(exercise_choice_id:u.exercise_choice_id).pluck(:answer_text).reject(&:blank?).map!(&:downcase)   #该选项的全部标准答案
-              if i_standard_answer.include?(u.answer_text.downcase)  #该空的标准答案包含用户的答案才有分数
-                u.update_column('score',q_score_2)
-                score2 = score2 + q_score_2
+        if q.question_type <= 2  #为选择题或判断题时
+          if answers_content.present?   #学生有回答时
+            answer_choice_array = []
+            answers_content.each do |a|
+              answer_choice_array.push(a.exercise_choice.choice_position)  #学生答案的位置
+            end
+            user_answer_content = answer_choice_array.sort
+            standard_answer = q.exercise_standard_answers.pluck(:exercise_choice_id).sort  #该问题的标准答案，可能有多个
+            if user_answer_content == standard_answer  #答案一致,多选或单选才给分，答案不对不给分
+              if standard_answer.count > 0
+                q_score_1 = (q.question_score.to_f / standard_answer.count)   #当多选答案正确时，每个answer的分数均摊。
+              else
+                q_score_1 = 0.0
               end
+              answers_content.update_all(:score => q_score_1)
+              score1 = score1 + q.question_score
             end
           else
-            st_answer_text = standard_answer_array.pluck(:answer_text).reject(&:blank?).map!(&:downcase)
-            answers_content.each do |u|
-              u_answer_text = u.answer_text.downcase
-              if st_answer_text.include?(u_answer_text)   #只要标准答案包含用户的答案，就有分数。同时，下一次循环时，就会删除该标准答案。防止用户的相同答案获分
-                u.update_column("score",q_score_2)
-                score2 = score2 + q_score_2
-                st_answer_text.delete(u_answer_text)
+            score1 += 0.0
+          end
+        elsif q.question_type == 3   #填空题
+          if answers_content.present?
+            null_standard_answer = q.exercise_standard_answers
+            standard_answer_array = null_standard_answer.select(:exercise_choice_id,:answer_text)
+            standard_answer_ids = standard_answer_array.pluck(:exercise_choice_id).reject(&:blank?).uniq   #标准答案的exercise_choice_id数组
+            standard_answer_count = standard_answer_ids.count
+            if standard_answer_count > 0  #存在标准答案时才有分数
+              q_score_2 = (q.question_score.to_f / standard_answer_count) #每一空的得分
+            else
+              q_score_2 = 0.0
+            end
+            if q.is_ordered
+              answers_content.each do |u|
+                i_standard_answer = standard_answer_array.where(exercise_choice_id:u.exercise_choice_id).pluck(:answer_text).reject(&:blank?).map!(&:downcase)   #该选项的全部标准答案
+                if i_standard_answer.include?(u.answer_text.downcase)  #该空的标准答案包含用户的答案才有分数
+                  u.update_column('score',q_score_2)
+                  score2 = score2 + q_score_2
+                end
+              end
+            else
+              st_answer_text = standard_answer_array.pluck(:answer_text).reject(&:blank?).map!(&:downcase)
+              answers_content.each do |u|
+                u_answer_text = u.answer_text.downcase
+                if st_answer_text.include?(u_answer_text)   #只要标准答案包含用户的答案，就有分数。同时，下一次循环时，就会删除该标准答案。防止用户的相同答案获分
+                  u.update_column("score",q_score_2)
+                  score2 = score2 + q_score_2
+                  st_answer_text.delete(u_answer_text)
+                end
               end
             end
+          else
+            score2 += 0.0
           end
-        else
-          score2 += 0.0
-        end
-      elsif q.question_type == 5   #实训题时，主观题这里不评分
-        q.exercise_shixun_challenges.each do |exercise_cha|
-          game = Game.user_games(user.id,exercise_cha.challenge_id)&.first  #当前用户的关卡
-          if game.present?
-            exercise_cha_score = 0.0
-            answer_status = 0
-            if game.status == 2 && game.final_score >= 0
-              exercise_cha_score = exercise_cha.question_score #每一关卡的得分
-              answer_status = 1
-            end
-            ex_shixun_answer_content = answers_content&.where(exercise_shixun_challenge_id: exercise_cha.id)
-            if ex_shixun_answer_content.blank?  #把关卡的答案存入试卷的实训里
-              cha_path = challenge_path exercise_cha.challenge&.path
-              game_challenge = game.game_codes.search_challenge_path(cha_path)&.first
-              if game_challenge.present?
-                game_code = game_challenge
-                code = game_code.try(:new_code)
+        elsif q.question_type == 5   #实训题时，主观题这里不评分
+          q.exercise_shixun_challenges&.each do |exercise_cha|
+            game = Game.user_games(user.id,exercise_cha.challenge_id)&.first  #当前用户的关卡
+            if game.present?
+              exercise_cha_score = 0.0
+              answer_status = 0
+              if game.status == 2 && game.final_score >= 0
+                exercise_cha_score = exercise_cha.question_score #每一关卡的得分
+                answer_status = 1
+              end
+              ex_shixun_answer_content = answers_content&.where(exercise_shixun_challenge_id: exercise_cha.id)
+              if ex_shixun_answer_content.blank?  #把关卡的答案存入试卷的实训里
+                cha_path = challenge_path(exercise_cha.challenge&.path)
+                game_challenge = game.game_codes.search_challenge_path(cha_path)&.first
+                if game_challenge.present?
+                  game_code = game_challenge
+                  code = game_code.try(:new_code)
+                else
+                  code = git_fle_content(exercise_cha.shixun&.repo_path,cha_path)
+                end
+                sx_option = {
+                    :exercise_question_id => q.id,
+                    :exercise_shixun_challenge_id => exercise_cha.id,
+                    :user_id => user.id,
+                    :score => exercise_cha_score,
+                    :answer_text => code,
+                    :status => answer_status
+                }
+                ExerciseShixunAnswer.create(sx_option)
               else
-                code = git_fle_content(exercise_cha.shixun&.repo_path,cha_path)
+                ex_shixun_answer_content.first.update_column('score',exercise_cha_score)
               end
-              sx_option = {
-                  :exercise_question_id => q.id,
-                  :exercise_shixun_challenge_id => exercise_cha.id,
-                  :user_id => user.id,
-                  :score => exercise_cha_score,
-                  :answer_text => code,
-                  :status => answer_status
-              }
-              ExerciseShixunAnswer.create(sx_option)
+              score5 += exercise_cha_score
             else
-              ex_shixun_answer_content.first.update_column('score',exercise_cha_score)
+              score5 += 0.0
             end
-            score5 += exercise_cha_score
-          else
-            score5 += 0.0
           end
         end
+        user_scores = answers_content.blank? ? 0.0 : answers_content.score_reviewed.pluck(:score).sum
+            if user_scores > 0.0
+          stand_answer = 1
+        else
+          stand_answer = 0
+        end
+        ques_option = {
+            "q_id":q.id,   #该问题的id
+            "q_type":q.question_type,
+            "q_position":q.question_number, #该问题的位置
+            "stand_status":stand_answer,  #该问题是否正确,1为正确，0为错误
+            "user_score":user_scores.round(1)  #每个问题的总得分
+        }
+        ques_stand.push(ques_option)
+      rescue Exception => e
+        Rails.logger.info("calcuclate_score_have_error____________________________#{e}")
+        next
       end
-      user_scores = answers_content.present? ? answers_content.score_reviewed.pluck(:score).sum : 0.0
-      if user_scores > 0.0
-        stand_answer = 1
-      else
-        stand_answer = 0
-      end
-      ques_option = {
-          "q_id":q.id,   #该问题的id
-          "q_type":q.question_type,
-          "q_position":q.question_number, #该问题的位置
-          "stand_status":stand_answer,  #该问题是否正确,1为正确，0为错误
-          "user_score":user_scores  #每个问题的总得分
-      }
-      ques_stand.push(ques_option)
+
     end
     total_score = score1 + score2 + score5
     {
-        "total_score":total_score,
+        "total_score":total_score.round(1),
         "stand_status":ques_stand
     }
   end
@@ -687,7 +693,7 @@ module ExercisesHelper
       exercise_user = exercise.exercise_users.find_by(user_id:user.id)
       time_mill = ex_time * 60   #转为秒
       exercise_end_time = exercise.end_time.present? ? exercise.end_time.to_i : 0
-      exercise_user_start = exercise_user.present? ? exercise_user.start_at.to_i : 0
+      exercise_user_start = exercise_user&.start_at.present? ? exercise_user.start_at.to_i : 0
       #用户未开始答题时，即exercise_user_start为0
       if exercise_user_start == 0
         if (exercise_end_time - time_now_i) > time_mill
diff --git a/app/helpers/export_helper.rb b/app/helpers/export_helper.rb
index af883131a..b6720c66c 100644
--- a/app/helpers/export_helper.rb
+++ b/app/helpers/export_helper.rb
@@ -89,11 +89,12 @@ module ExportHelper
         if teacher_comments.present?
           w_18 = ""
           teacher_comments.each do |t|
-            user_name = t.user.real_name
+            user_name = t.user&.real_name
             user_time = format_time(t.updated_at)
-            user_score = t.score
-            user_comment = t.comment
-            w_18 = w_18 + ("教师:" + user_name + "\n" + "时间:" + user_time.to_s + "\n" + "分数:" + user_score.to_s + "分" + "\n" + "评语:" + user_comment + "\n\n")
+            user_score = t&.score
+            user_comment = t.comment.present? ? t.comment : "--"
+            comment_title = "教师:#{user_name}\n时间:#{user_time.to_s}\n分数:#{user_score.to_s}分\n评语:#{user_comment}\n\n"
+            w_18 = w_18 + comment_title
           end
         else
           w_18 = "--"
@@ -160,11 +161,13 @@ module ExportHelper
         if teacher_comments.present?
           w_18 = ""
           teacher_comments.each do |t|
-            user_name = t.user.real_name
+            user_name = t.user&.real_name
             user_time = format_time(t.updated_at)
-            user_score = t.score
-            user_comment = t.comment
-            w_18 = w_18 + ("教师:" + user_name + "\n" + "时间:" + user_time.to_s + "\n" + "分数:" + user_score.to_s + "分" + "\n" + "评语:" + user_comment + "\n\n")
+            user_score = t&.score
+            user_comment = t.comment.present? ? t.comment : "--"
+            comment_title = "教师:#{user_name}\n时间:#{user_time.to_s}\n分数:#{user_score.to_s}分\n评语:#{user_comment}\n\n"
+            # ("教师:" + user_name + "\n" + "时间:" + user_time.to_s + "\n" + "分数:" + user_score.to_s + "分" + "\n" + "评语:" + user_comment + "\n\n")
+            w_18 = w_18 + comment_title
           end
         else
           w_18 = "--"
diff --git a/app/models/edu_setting.rb b/app/models/edu_setting.rb
index 4b39dea81..835aaec76 100644
--- a/app/models/edu_setting.rb
+++ b/app/models/edu_setting.rb
@@ -20,6 +20,6 @@ class EduSetting < ApplicationRecord
   private
 
   def expire_value_cache
-    Rails.cache.clear(value_cache_key)
+    Rails.cache.write(value_cache_key, value)
   end
 end
diff --git a/app/models/game.rb b/app/models/game.rb
index c08884afb..ba6664d5c 100644
--- a/app/models/game.rb
+++ b/app/models/game.rb
@@ -115,9 +115,9 @@ class Game < ApplicationRecord
   end
 
   # 评测次数
-  def evaluate_count
-    self.outputs.pluck(:query_index).first
-  end
+  #def evaluate_count
+  #  self.outputs.pluck(:query_index).first
+  #end
 
   # 用户关卡得分
   def get_user_final_score
diff --git a/app/services/homeworks_service.rb b/app/services/homeworks_service.rb
index 2d6f50b5c..1e155dde0 100644
--- a/app/services/homeworks_service.rb
+++ b/app/services/homeworks_service.rb
@@ -111,7 +111,7 @@ class HomeworksService
         if homework.work_efficiency
           if homework.max_efficiency < student_work.efficiency
             # homework.max_efficiency = student_work.efficiency
-            homework.update_column("max_efficiency", homework.max_efficiency)
+            homework.update_column("max_efficiency", student_work.efficiency)
           end
           # eff_score = homework.max_efficiency == 0 ? 0 : student_work.efficiency / homework.max_efficiency * homework.eff_score
           # student_work.eff_score = format("%.2f", eff_score)
@@ -200,7 +200,7 @@ class HomeworksService
 
               # 如果作业的最大效率值有变更则更新所有作品的效率分
               if homework.work_efficiency && homework.max_efficiency < work.efficiency
-                homework.update_column("max_efficiency", homework.max_efficiency)
+                homework.update_column("max_efficiency", work.efficiency)
               end
             end
 
diff --git a/app/tasks/exercise_publish_task.rb b/app/tasks/exercise_publish_task.rb
index 4c8ee39e8..3df5f84ae 100644
--- a/app/tasks/exercise_publish_task.rb
+++ b/app/tasks/exercise_publish_task.rb
@@ -6,7 +6,7 @@ class ExercisePublishTask
     Rails.logger.info("log--------------------------------exercise_publish start")
     puts "--------------------------------exercise_publish start"
     exercises = Exercise.includes(:exercise_users).where("publish_time is not null and exercise_status = 1 and publish_time <=?",Time.now)
-    exercises.each do |exercise|
+    exercises&.each do |exercise|
       exercise.update_column('exercise_status', 2)
       course = exercise.course
       tid_str = ""
@@ -45,7 +45,7 @@ class ExercisePublishTask
 
     # 分组设置发布时间的测验
     exercise_group_settings = ExerciseGroupSetting.where("publish_time < ? and publish_time > ?", Time.now + 900, Time.now - 900)
-    exercise_group_settings.each do |exercise_group|
+    exercise_group_settings&.each do |exercise_group|
       exercise = exercise_group.exercise
       if exercise.present?
         course = exercise.course
@@ -71,29 +71,35 @@ class ExercisePublishTask
     puts "--------------------------------exercise_end start"
     # 1。统一设置的试卷
     exercises = Exercise.includes(:exercise_users,:exercise_questions).where("exercise_status = 2 AND unified_setting = true AND end_time <= ?",Time.now + 900)
-    exercises.each do |exercise|
+    exercises&.each do |exercise|
       ex_type = exercise.exercise_questions.pluck(:question_type).uniq
       exercise.update_column('exercise_status', 3)
-      exercise.exercise_users.each do |exercise_user|
-        if exercise_user&.commit_status == 0 && exercise_user&.start_at.present?
-          s_score = calculate_student_score(exercise, exercise_user.user)[:total_score]
-          if ex_type.include?(4)   #是否包含主观题
-            subjective_score = exercise_user.subjective_score
-          else
-            subjective_score = -1.0
+      exercise.exercise_users&.each do |exercise_user|
+        begin
+          if (exercise_user&.commit_status == 0) && (exercise_user&.start_at.present?)
+            s_score = calculate_student_score(exercise, exercise_user.user)[:total_score]
+            if ex_type.include?(4)   #是否包含主观题
+              subjective_score = exercise_user.subjective_score
+            else
+              subjective_score = -1.0
+            end
+            total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
+            total_score = s_score + total_score_subjective_score
+            commit_option = {
+                :status => 1,
+                :commit_status => 1,
+                :end_at => Time.now,
+                :objective_score => s_score,
+                :score => total_score,
+                :subjective_score => subjective_score
+            }
+            exercise_user.update_attributes(commit_option)
           end
-          total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
-          total_score = s_score + total_score_subjective_score
-          commit_option = {
-              :status => 1,
-              :commit_status => 1,
-              :end_at => Time.now,
-              :objective_score => s_score,
-              :score => total_score,
-              :subjective_score => subjective_score
-          }
-          exercise_user.update_attributes(commit_option)
+        rescue Exception => e
+          Rails.logger.info("rescue errors ___________________________#{e}")
+          next
         end
+
       end
     end
 
@@ -101,36 +107,41 @@ class ExercisePublishTask
     all_exercises = Exercise.includes(:exercise_group_settings,:exercise_users,:exercise_questions).where("unified_setting = false AND exercise_status = 2 AND end_time > ?",Time.now + 900)
     exercise_ids = all_exercises.blank? ? "(-1)" : "(" + all_exercises.map(&:id).join(",") + ")"
     ex_group_settings = ExerciseGroupSetting.where("end_time <= '#{Time.now}' and exercise_id in #{exercise_ids}")
-    ex_group_settings.each do |exercise_setting|
+    ex_group_settings&.each do |exercise_setting|
       exercise = exercise_setting.exercise
-      if exercise&.end_time <= Time.now
+      if exercise.end_time <= Time.now
         exercise.update_column('exercise_status', 3)
       end
 
       ex_types = exercise.exercise_questions.pluck(:question_type).uniq
       users = exercise.course.students.where(:course_group_id => exercise_setting.course_group_id)
       exercise_users = exercise.exercise_users.where(:user_id => users.pluck(:user_id))
-
-      exercise_users.each do |exercise_user|
-        if exercise_user.commit_status == 0 && !exercise_user.start_at.nil?
-          if ex_types.include?(4)   #是否包含主观题
-            subjective_score = exercise_user.subjective_score
-          else
-            subjective_score = -1.0
+      exercise_users&.each do |exercise_user|
+        begin
+          if exercise_user.commit_status == 0 && !exercise_user.start_at.nil?
+            if ex_types.include?(4)   #是否包含主观题
+              subjective_score = exercise_user.subjective_score
+            else
+              subjective_score = -1.0
+            end
+            s_score = calculate_student_score(exercise, exercise_user.user)[:total_score]
+            total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
+            total_score = s_score + total_score_subjective_score
+            commit_option = {
+                :status => 1,
+                :commit_status => 1,
+                :end_at => Time.now,
+                :objective_score => s_score,
+                :score => total_score,
+                :subjective_score => subjective_score
+            }
+            exercise_user.update_attributes(commit_option)
           end
-          s_score = calculate_student_score(exercise, exercise_user.user)[:total_score]
-          total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
-          total_score = s_score + total_score_subjective_score
-          commit_option = {
-              :status => 1,
-              :commit_status => 1,
-              :end_at => Time.now,
-              :objective_score => s_score,
-              :score => total_score,
-              :subjective_score => subjective_score
-          }
-          exercise_user.update_attributes(commit_option)
+        rescue Exception => e
+          Rails.logger.info("unified_setting_false_rescue errors ___________________________#{e}")
+          next
         end
+
       end
     end
     Rails.logger.info("log--------------------------------exercise_end end")
diff --git a/app/views/exercises/index.json.jbuilder b/app/views/exercises/index.json.jbuilder
index d7d51c343..4694ecdf0 100644
--- a/app/views/exercises/index.json.jbuilder
+++ b/app/views/exercises/index.json.jbuilder
@@ -23,7 +23,8 @@ if @exercises_count > 0
       ex_index = exercise_index_show(exercise,@course,@is_teacher_or,@current_user_)
       json.extract! exercise, :id, :exercise_name,:is_public,:created_at
       if @is_teacher_or == 2
-        json.time get_exercise_left_time(exercise,@current_user_)
+        second_left = get_exercise_left_time(exercise,@current_user_)
+        json.time second_left.present? ? (second_left / 60) : nil
       end
 
       json.exercise_status ex_index[:ex_status]
diff --git a/app/views/shixuns/index.json.jbuilder b/app/views/shixuns/index.json.jbuilder
index 41da7120f..8e5d49a34 100644
--- a/app/views/shixuns/index.json.jbuilder
+++ b/app/views/shixuns/index.json.jbuilder
@@ -1,7 +1,8 @@
-if @fuzzy_searchs
-  json.keyword @fuzzy_searchs
-  json.total_count @fuzzy_searchs.blank? ? nil : @total_count
-end
+# if @fuzzy_searchs
+#   json.keyword @fuzzy_searchs
+#   json.total_count @fuzzy_searchs.blank? ? nil : @total_count
+# end
+json.total_count @total_count
 json.pagination @total_count > 16 ? true : false
 json.search_tags @search_tags
 json.shixuns do
diff --git a/app/views/student_works/shixun_work.json.jbuilder b/app/views/student_works/shixun_work.json.jbuilder
index 3b6b598cb..74c33420e 100644
--- a/app/views/student_works/shixun_work.json.jbuilder
+++ b/app/views/student_works/shixun_work.json.jbuilder
@@ -15,6 +15,7 @@ json.efficiency number_with_precision @work.efficiency, precision: 2
 json.max_efficiency number_with_precision @homework.max_efficiency, precision: 2
 json.passed_time @myshixun.passed_time
 json.total_spend_time @myshixun.total_spend_time
+json.user_score @myshixun.total_score
 
 # 关卡完成情况
 index = 1