From dd974ffd29229d383ad71b21fa1a65359411e82d Mon Sep 17 00:00:00 2001
From: cxt <853663049@qq.com>
Date: Wed, 17 Apr 2019 15:59:57 +0800
Subject: [PATCH] =?UTF-8?q?=E8=AF=95=E5=8D=B7=E5=AE=9E=E8=AE=AD=E9=A2=98?=
 =?UTF-8?q?=E6=94=B9=E7=89=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 app/controllers/exercise_controller.rb        | 203 ++++++++++--------
 app/helpers/exercise_helper.rb                |  25 ++-
 app/models/exercise.rb                        |  29 ++-
 app/models/exercise_level_setting.rb          |   5 +
 app/models/exercise_question.rb               |   4 +
 app/models/exercise_user.rb                   |   2 +
 app/models/exercise_user_question.rb          |   6 +
 app/views/exercise/_exercise_student.html.erb |   4 +-
 .../_exercise_student_result.html.erb         |   6 +-
 ...17024319_create_exercise_level_settings.rb |  19 ++
 ..._add_exercise_level_setting_to_question.rb |  12 ++
 .../20190417024736_create_question_count.rb   |  13 ++
 ...17033935_create_exercise_user_questions.rb |  14 ++
 spec/factories/exercise_level_settings.rb     |   8 +
 spec/factories/exercise_user_questions.rb     |   7 +
 spec/models/exercise_level_setting_spec.rb    |   5 +
 spec/models/exercise_user_question_spec.rb    |   5 +
 17 files changed, 263 insertions(+), 104 deletions(-)
 create mode 100644 app/models/exercise_level_setting.rb
 create mode 100644 app/models/exercise_user_question.rb
 create mode 100644 db/migrate/20190417024319_create_exercise_level_settings.rb
 create mode 100644 db/migrate/20190417024510_add_exercise_level_setting_to_question.rb
 create mode 100644 db/migrate/20190417024736_create_question_count.rb
 create mode 100644 db/migrate/20190417033935_create_exercise_user_questions.rb
 create mode 100644 spec/factories/exercise_level_settings.rb
 create mode 100644 spec/factories/exercise_user_questions.rb
 create mode 100644 spec/models/exercise_level_setting_spec.rb
 create mode 100644 spec/models/exercise_user_question_spec.rb

diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index 65a0b9e9..2dfc2601 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -73,8 +73,14 @@ class ExerciseController < ApplicationController
       @exercise_user = ExerciseUser.where("user_id=? and exercise_id=?", User.current.id, @exercise.id).first
       if @exercise_user.nil?
         @exercise_user = ExerciseUser.create(:user_id => User.current.id, :exercise_id => @exercise.id, :start_at => Time.now, :status => false, :commit_status => 0)
+        if @exercise.exercise_level_settings.where("num != exercise_questions_count").count > 0
+          @exercise.create_user_question_list(@exercise_user)
+        end
         # @exercise_user = ExerciseUser.where("user_id=? and exercise_id=?", User.current.id, @exercise.id).first
       elsif @exercise_user.start_at.nil?
+        if @exercise.exercise_level_settings.where("num != exercise_questions_count").count > 0
+          @exercise.create_user_question_list(@exercise_user)
+        end
         @exercise_user.update_attributes(:start_at => Time.now)
       end
 
@@ -103,7 +109,9 @@ class ExerciseController < ApplicationController
       @exercise_user = ExerciseUser.where("user_id=? and exercise_id=?", params[:user_id], @exercise.id).first
       @can_edit_excercise = false
     end
-    Rails.logger.info("###########can_edit_excercise:#{@can_edit_excercise}")
+
+    @exercise_questions = user_question_list @exercise_user.id
+
     # @percent = get_percent(@exercise,User.current)
     #@exercise_questions = @exercise.exercise_questions
     respond_to do |format|
@@ -139,11 +147,13 @@ class ExerciseController < ApplicationController
     else
       none_shixun_ids = ShixunSchool.where("school_id != #{User.current.user_extensions.try(:school_id)}").pluck(:shixun_id)
     end
-    @shixuns = Shixun.where("status = 2 and id not in (#{none_shixun_ids.join(",")})").where("name like ?", "%#{search}%").select{|shixun| shixun.challenges.where(:st => 1).count == 0}
+    @shixuns = Shixun.where("status = 2 and challenges_count = 1 and id not in (#{none_shixun_ids.join(",")})").
+        where("name like ?", "%#{search}%").select{|shixun| shixun.challenges.where(:st => 1).count == 0}
     @limit = 8
     @shixuns = paginateHelper @shixuns, @limit
     respond_to do |format|
       format.js
+      render json: exercise_shixun_json_data(@shixuns)
     end
   end
 
@@ -977,118 +987,122 @@ class ExerciseController < ApplicationController
     # 已提交过的且是限时的则不允许答题
     exercise_user = ExerciseUser.where(:exercise_id => @exercise.id, :user_id => User.current.id).first
 
-    if (exercise_user && exercise_user.commit_status == 1) || @exercise.end_time < Time.now
-      render :json => {:text => "Over"}
-      return
-    end
-    if eq.question_type == 1
-      # 单选题
-      ea = ExerciseAnswer.find_by_exercise_question_id_and_user_id(params[:exercise_question_id],User.current.id)
-      if ea.nil?
-        # 尚未答该题，添加答案
-        ea = ExerciseAnswer.new
-        ea.user_id = User.current.id
-        ea.exercise_question_id = params[:exercise_question_id]
-      end
-      #修改该题对应答案
-      ea.exercise_choice_id = params[:exercise_choice_id]
-      if ea.save
-        # 保存成功返回成功信息及当前以答题百分比
-        uncomplete_question = get_uncomplete_question(@exercise, User.current)
-        if uncomplete_question.count < 1
-          complete = 1;
-        else
-          complete = 0;
-        end
-        @percent = get_percent(@exercise,User.current)
-        render :json => {:text => "ok" ,:complete => complete,:percent => format("%.2f" ,@percent)}
-      else
-        #返回失败信息
-        render :json => {:text => "failure"}
+    if exercise_user
+      if (exercise_user && exercise_user.commit_status == 1) || @exercise.end_time < Time.now
+        render :json => {:text => "Over"}
+        return
       end
-    elsif eq.question_type == 2
-      #多选题
-      ea = ExerciseAnswer.find_by_exercise_choice_id_and_user_id(params[:exercise_choice_id],User.current.id)
-      if ea.nil?
-        #尚未答该题，添加答案
-        ea = ExerciseAnswer.new
-        ea.user_id = User.current.id
-        ea.exercise_question_id = params[:exercise_question_id]
+      if eq.question_type == 1
+        # 单选题
+        ea = ExerciseAnswer.find_by_exercise_question_id_and_user_id(params[:exercise_question_id],User.current.id)
+        if ea.nil?
+          # 尚未答该题，添加答案
+          ea = ExerciseAnswer.new
+          ea.user_id = User.current.id
+          ea.exercise_question_id = params[:exercise_question_id]
+        end
+        #修改该题对应答案
         ea.exercise_choice_id = params[:exercise_choice_id]
         if ea.save
-          uncomplete_question = get_uncomplete_question(@exercise, User.current)
+          # 保存成功返回成功信息及当前以答题百分比
+          uncomplete_question = get_uncomplete_question(@exercise, exercise_user)
           if uncomplete_question.count < 1
             complete = 1;
           else
             complete = 0;
           end
-          is_answer = User.current.exercise_answer.where(:exercise_question_id => params[:exercise_question_id].to_i).count > 0
-          @percent = get_percent(@exercise,User.current)
-          render :json => {:text => "ok",:complete => complete,:percent => format("%.2f" ,@percent),:is_answer => is_answer}
-        else
-          render :json => {:text => "failure"}
-        end
-      else
-        #pv不为空，则当前选项之前已被选择，再次点击则是不再选择该项，故删除该答案
-        if ea.delete
-          is_answer = User.current.exercise_answer.where(:exercise_question_id => params[:exercise_question_id].to_i).count > 0
-          @percent = get_percent(@exercise, User.current)
-          render :json => {:text => "false" ,:percent => format("%.2f" , @percent),:is_answer => is_answer}
+          @percent = get_percent(@exercise, exercise_user)
+          render :json => {:text => "ok" ,:complete => complete,:percent => format("%.2f" ,@percent)}
         else
+          #返回失败信息
           render :json => {:text => "failure"}
         end
-      end
-    elsif eq.question_type == 3 || eq.question_type == 4
-      #单行文本，多行文本题
-      ea = ExerciseAnswer.find_by_exercise_question_id_and_user_id(params[:exercise_question_id], User.current.id)
-      if ea.nil?
-        # ea为空之前尚未答题，添加答案
-        if params[:answer_text].nil? || params[:answer_text].blank?
-          #用户提交空答案，视作不作答
-          @percent = get_percent(@exercise,User.current)
-          render :json => {:text => "",:percent => format("%.2f", @percent)}
-        else
-          #添加答案
+      elsif eq.question_type == 2
+        #多选题
+        ea = ExerciseAnswer.find_by_exercise_choice_id_and_user_id(params[:exercise_choice_id],User.current.id)
+        if ea.nil?
+          #尚未答该题，添加答案
           ea = ExerciseAnswer.new
           ea.user_id = User.current.id
           ea.exercise_question_id = params[:exercise_question_id]
-          ea.answer_text = params[:answer_text]
+          ea.exercise_choice_id = params[:exercise_choice_id]
           if ea.save
-            uncomplete_question = get_uncomplete_question(@exercise, User.current)
+            uncomplete_question = get_uncomplete_question(@exercise, exercise_user)
             if uncomplete_question.count < 1
               complete = 1;
             else
               complete = 0;
             end
-            @percent = get_percent(@exercise,User.current)
-            render :json => {:text => ea.answer_text,:complete => complete,:percent => format("%.2f",@percent)}
+            is_answer = User.current.exercise_answer.where(:exercise_question_id => params[:exercise_question_id].to_i).count > 0
+            @percent = get_percent(@exercise, exercise_user)
+            render :json => {:text => "ok",:complete => complete,:percent => format("%.2f" ,@percent),:is_answer => is_answer}
           else
             render :json => {:text => "failure"}
           end
-        end
-
-      else
-        # ea不为空说明用户之前已作答
-        if params[:answer_text].nil? || params[:answer_text].blank?
-          # 用户提交空答案，视为删除答案
+        else
+          #pv不为空，则当前选项之前已被选择，再次点击则是不再选择该项，故删除该答案
           if ea.delete
-            @percent = get_percent(@exercise,User.current)
-            render :json => {:text => "",:percent => format("%.2f", @percent)}
+            is_answer = User.current.exercise_answer.where(:exercise_question_id => params[:exercise_question_id].to_i).count > 0
+            @percent = get_percent(@exercise, exercise_user)
+            render :json => {:text => "false" ,:percent => format("%.2f" , @percent),:is_answer => is_answer}
           else
             render :json => {:text => "failure"}
           end
+        end
+      elsif eq.question_type == 3 || eq.question_type == 4
+        #单行文本，多行文本题
+        ea = ExerciseAnswer.find_by_exercise_question_id_and_user_id(params[:exercise_question_id], User.current.id)
+        if ea.nil?
+          # ea为空之前尚未答题，添加答案
+          if params[:answer_text].nil? || params[:answer_text].blank?
+            #用户提交空答案，视作不作答
+            @percent = get_percent(@exercise, exercise_user)
+            render :json => {:text => "",:percent => format("%.2f", @percent)}
+          else
+            #添加答案
+            ea = ExerciseAnswer.new
+            ea.user_id = User.current.id
+            ea.exercise_question_id = params[:exercise_question_id]
+            ea.answer_text = params[:answer_text]
+            if ea.save
+              uncomplete_question = get_uncomplete_question(@exercise, exercise_user)
+              if uncomplete_question.count < 1
+                complete = 1;
+              else
+                complete = 0;
+              end
+              @percent = get_percent(@exercise, exercise_user)
+              render :json => {:text => ea.answer_text,:complete => complete,:percent => format("%.2f",@percent)}
+            else
+              render :json => {:text => "failure"}
+            end
+          end
+
         else
-          #用户修改答案
-          ea.answer_text = params[:answer_text]
-          if ea.save
-            @percent = get_percent(@exercise,User.current)
-            render :json => {:text => ea.answer_text,:percent => format("%.2f", @percent)}
+          # ea不为空说明用户之前已作答
+          if params[:answer_text].nil? || params[:answer_text].blank?
+            # 用户提交空答案，视为删除答案
+            if ea.delete
+              @percent = get_percent(@exercise, exercise_user)
+              render :json => {:text => "",:percent => format("%.2f", @percent)}
+            else
+              render :json => {:text => "failure"}
+            end
           else
-            render :json => {:text => "failure"}
+            #用户修改答案
+            ea.answer_text = params[:answer_text]
+            if ea.save
+              @percent = get_percent(@exercise, exercise_user)
+              render :json => {:text => ea.answer_text,:percent => format("%.2f", @percent)}
+            else
+              render :json => {:text => "failure"}
+            end
           end
         end
-      end
 
+      else
+        render :json => {:text => "failure"}
+      end
     else
       render :json => {:text => "failure"}
     end
@@ -1165,9 +1179,10 @@ class ExerciseController < ApplicationController
 
   # 获取学生未答情况
   def get_student_uncomplete_question
+    exercise_user = @exercise.exercise_users.where(:user_id => User.current).first
     time_limit = @exercise.time == -1 || @exercise.time.nil?
-    uncomplete_count = get_uncomplete_question(@exercise, User.current).count
-    uncomplete_shixun = get_uncomplete_shixun(@exercise, User.current).count
+    uncomplete_count = get_uncomplete_question(@exercise, exercise_user).count
+    uncomplete_shixun = get_uncomplete_shixun(@exercise, exercise_user).count
     render :json => {:time_limit => time_limit, :uncomplete_count => uncomplete_count, :uncomplete_shixun => uncomplete_shixun}
   end
 
@@ -1241,8 +1256,8 @@ class ExerciseController < ApplicationController
     @is_teacher = params[:pdf] ? true : User.current.allowed_to?(:as_teacher,@course) || User.current.admin?
     if @is_teacher || (User.current.member_of_course?(@exercise.course) && @exercise.exercise_status > 2)
       @user = User.find params[:user_id]
-      @exercise_questions = @exercise.exercise_questions
       @exercise_user = ExerciseUser.where("user_id =? and exercise_id=?", @user.id, @exercise.id).first
+      @exercise_questions = @exercise.user_question_list @exercise_user.id
       respond_to do |format|
         if params[:pdf]
           format.html { render :layout => "pdf" }
@@ -1305,7 +1320,8 @@ class ExerciseController < ApplicationController
     score2 = 0
     score3 = 0
     score4 = 0
-    exercise_qustions = exercise.exercise_questions
+    exercise_user = exercise.exercise_users.where(user_id: user.id).first
+    exercise_qustions = exercise.user_question_list(exercise_user.try(:id))
     exercise_qustions.each do |question|
       if question.question_type != 5
         answer = get_user_answer(question, user)
@@ -1608,11 +1624,11 @@ class ExerciseController < ApplicationController
     standard_answer
   end
   # 是否完成了答题
-  def get_complete_question(exercise,user)
-    questions = exercise.exercise_questions.includes(:exercise_answers)
+  def get_complete_question(exercise, exercise_user)
+    questions = exercise.user_question_list(exercise_user.id).includes(:exercise_answers)
     complete_question = []
     questions.each do |question|
-      answers = question.exercise_answers.select{|e| e.user_id == user.id}
+      answers = question.exercise_answers.select{|e| e.user_id == exercise_user.user_id}
       if !(answers.nil? || answers.count < 1)
         complete_question << question
       end
@@ -1621,12 +1637,13 @@ class ExerciseController < ApplicationController
   end
 
   # 获取答题百分比
-  def get_percent exercise,user
-    complete_count = get_complete_question(exercise,user).count
-    if exercise.exercise_questions.count == 0
+  def get_percent exercise, exercise_user
+    complete_count = get_complete_question(exercise,exercise_user).count
+    questions = exercise.user_question_list(exercise_user.id)
+    if questions.count == 0
       return 0
     else
-      return (complete_count.to_f / exercise.exercise_questions.count.to_f)*100
+      return (complete_count.to_f / questions.count.to_f)*100
     end
   end
 
diff --git a/app/helpers/exercise_helper.rb b/app/helpers/exercise_helper.rb
index b5a56020..cdea7b88 100644
--- a/app/helpers/exercise_helper.rb
+++ b/app/helpers/exercise_helper.rb
@@ -1,5 +1,18 @@
 # encoding: utf-8
 module ExerciseHelper
+  def exercise_shixun_json_data shixuns
+    shixuns.map do |shixun|
+      shixun_owner = shixun.owner.try(:show_name)
+      shixun_path = shixun_path(shixun)
+      shixun_level = shixun.shixun_level
+      shixun.attributes.dup.except("gpid", "identifier", "major_id", "webssh", "homepage_show", "fork_from", "git_url",
+                                   "mirror_script_id", "repo_name", "pod_life").merge({
+                                                                                          shixun_owner: shixun_owner,
+                                                                                          shixun_level: shixun_level,
+                                                                                          shixun_path: shixun_path
+                                                                                      })
+    end
+  end
 
   def un_commit_num exercise
     course = exercise.course
@@ -266,12 +279,13 @@ module ExerciseHelper
   end
 
   #获取未完成的题目
-  def get_uncomplete_question exercise,user
+  def get_uncomplete_question exercise, exercise_user
     # all_questions = exercise.exercise_questions.includes(:exercise_answers).where("question_type != 5")
     uncomplete_question = []
-    exercise.exercise_questions.includes(:exercise_answers).where("question_type != 5").each do |question|
+    questions = exercise.user_question_list(exercise_user.id)
+    questions.includes(:exercise_answers).where("question_type != 5").each do |question|
       # answers = get_user_answer(question, user)
-      answers = question.exercise_answers.select{|e| e.user_id == user.id}
+      answers = question.exercise_answers.select{|e| e.user_id == exercise_user.user_id}
       if answers.empty?
         uncomplete_question << question
       end
@@ -280,8 +294,9 @@ module ExerciseHelper
   end
 
   # 获取未通关的实训
-  def get_uncomplete_shixun exercise,user
-    all_questions = exercise.exercise_questions.where("question_type = 5")
+  def get_uncomplete_shixun exercise, exercise_user
+    questions = exercise.user_question_list(exercise_user.try(:id))
+    all_questions = questions.where("question_type = 5")
     uncomplete_shixun = []
     all_questions.each do |question|
       myshixun = Myshixun.where(:shixun_id => question.shixun_id, :user_id => user.id).first
diff --git a/app/models/exercise.rb b/app/models/exercise.rb
index 47993cf9..a8452df0 100644
--- a/app/models/exercise.rb
+++ b/app/models/exercise.rb
@@ -5,13 +5,17 @@ class Exercise < ActiveRecord::Base
   belongs_to :course ,:touch => true
   belongs_to :exercise_bank
   has_many :exercise_group_settings, :dependent => :destroy
-  has_many :exercise_questions, :dependent => :destroy,:order => "#{ExerciseQuestion.table_name}.question_number"
+  has_many :exercise_questions, :dependent => :destroy
   has_many :exercise_users, :dependent => :destroy, :conditions => "exercise_users.is_delete = 0"
   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
   has_many :tidings, as: :container, dependent: :destroy
   has_many :course_messages, :class_name =>'CourseMessage', :as => :course_message, :dependent => :destroy
+
+  has_many :exercise_level_settings, :dependent => :destroy
+  has_many :exercise_user_questions
+
   after_create :acts_as_course_message
   def acts_as_course_message
     if self.course
@@ -24,4 +28,27 @@ class Exercise < ActiveRecord::Base
       end
     end
   end
+
+  def create_user_question_list exercise_user_id
+    self.exercise_questions.where("question_type != 5").each do |question|
+      self.exercise_user_questions << ExerciseUserQuestion.new(exercise_user_id: exercise_user_id,
+                                                               exercise_question_id: question)
+    end
+    self.exercise_level_settings.each do |setting|
+      # 每个级别中随机挑选num个实训题
+      setting.exercise_questions.pluck(:id).sample(setting.num).each do |question_id|
+        self.exercise_user_questions << ExerciseUserQuestion.new(exercise_user_id: exercise_user_id,
+                                                                 exercise_question_id: question_id)
+      end
+    end
+  end
+
+  def user_question_list exercise_user_id
+    if self.exercise_user_questions.where(exercise_user_id: exercise_user_id).count == 0
+      self.exercise_questions
+    else
+      self.exercise_questions.where(id: self.exercise_user_questions.where(exercise_user_id: exercise_user_id).
+          pluck(:exercise_question_id))
+    end
+  end
 end
diff --git a/app/models/exercise_level_setting.rb b/app/models/exercise_level_setting.rb
new file mode 100644
index 00000000..3e687d8c
--- /dev/null
+++ b/app/models/exercise_level_setting.rb
@@ -0,0 +1,5 @@
+class ExerciseLevelSetting < ActiveRecord::Base
+  belongs_to :exercise
+  has_many :exercise_questions
+  # attr_accessible :level, :num, :score
+end
diff --git a/app/models/exercise_question.rb b/app/models/exercise_question.rb
index cadc67fc..63d9cdf9 100644
--- a/app/models/exercise_question.rb
+++ b/app/models/exercise_question.rb
@@ -1,6 +1,7 @@
 #encoding: utf-8
 class ExerciseQuestion < ActiveRecord::Base
   include Redmine::SafeAttributes
+  default_scope :order => 'question_number'
 
   belongs_to :exercise
   belongs_to :shixun
@@ -11,6 +12,9 @@ class ExerciseQuestion < ActiveRecord::Base
   has_many :exercise_answer_comments, :dependent => :destroy
   has_many :exercise_standard_answers, :dependent => :destroy
 
+  belongs_to :exercise_level_setting, counter_cache: true
+  has_many :exercise_user_questions, :dependent => :destroy
+
   def question_type_name
     case self.question_type
       when 1
diff --git a/app/models/exercise_user.rb b/app/models/exercise_user.rb
index c675f35a..8609ba26 100644
--- a/app/models/exercise_user.rb
+++ b/app/models/exercise_user.rb
@@ -4,4 +4,6 @@ class ExerciseUser < ActiveRecord::Base
 
   belongs_to :user
   belongs_to :exercise
+
+  has_many :exercise_user_questions
 end
diff --git a/app/models/exercise_user_question.rb b/app/models/exercise_user_question.rb
new file mode 100644
index 00000000..136a187f
--- /dev/null
+++ b/app/models/exercise_user_question.rb
@@ -0,0 +1,6 @@
+class ExerciseUserQuestion < ActiveRecord::Base
+  belongs_to :exercise
+  belongs_to :exercise_user
+  belongs_to :exercise_question
+  # attr_accessible :title, :body
+end
diff --git a/app/views/exercise/_exercise_student.html.erb b/app/views/exercise/_exercise_student.html.erb
index d361c200..5d12c301 100644
--- a/app/views/exercise/_exercise_student.html.erb
+++ b/app/views/exercise/_exercise_student.html.erb
@@ -134,9 +134,9 @@
     </div>
 
     <% if @exercise.question_random == 1 %>
-      <% question_list = @exercise.exercise_questions.includes(:exercise_shixun_answers, :exercise_choices => [:exercise_answers]).shuffle %>
+      <% question_list = @exercise_questions.includes(:exercise_shixun_answers, :exercise_choices => [:exercise_answers]).shuffle %>
     <% else %>
-      <% question_list = @exercise.exercise_questions.includes(:exercise_shixun_answers, :exercise_choices => [:exercise_answers]) %>
+      <% question_list = @exercise_questions.includes(:exercise_shixun_answers, :exercise_choices => [:exercise_answers]) %>
     <% end %>
 
 
diff --git a/app/views/exercise/_exercise_student_result.html.erb b/app/views/exercise/_exercise_student_result.html.erb
index b5336cdb..8c1de5ea 100644
--- a/app/views/exercise/_exercise_student_result.html.erb
+++ b/app/views/exercise/_exercise_student_result.html.erb
@@ -76,7 +76,7 @@
       </p>
     </div>
     <div class="clearfix ml80 mt10 mb5">
-      <% @exercise.exercise_questions.where(:question_type => [1, 2, 3, 5]).each do |eq| %>
+      <% exercise_questions.where(:question_type => [1, 2, 3, 5]).each do |eq| %>
         <% is_correct = answer_is_correct(eq, user) %>
         <a href="javascript:void(0);" onclick="scroll_70height(<%= eq.question_number%>);" style="cursor:pointer" class="checkstatus_box_big color_white <%= is_correct ? 'post_btn_green' : 'post_btn_red' %>"><%= eq.question_number %></a>
       <% end %>
@@ -88,14 +88,14 @@
       <span class="mr15 mt3 fr color-grey font-14">开始答题时间：<%= format_time @exercise_user.start_at %></span>
     </div>
     <div class="clearfix ml80 mt10">
-      <% @exercise.exercise_questions.where(:question_type => 4).each do |eq| %>
+      <% exercise_questions.where(:question_type => 4).each do |eq| %>
         <% ea = @exercise_user.user.exercise_answer.where(:exercise_question_id => eq.id).first %>
         <a href="javascript:void(0);" onclick="scroll_70height(<%= eq.question_number%>);" style="cursor:pointer" id="ex_comment_status_<%= eq.id %>" class="checkstatus_box_big <%= (ea && ea.score == -1) ? 'post_btn_grey' : 'post_btn_white' %>"><%= eq.question_number %></a>
       <% end %>
     </div>
   </div>
   <div class="clearfix" id="problem_main">
-    <% question_list = @exercise.exercise_questions.includes(:exercise_shixun_answers, :exercise_choices => [:exercise_answers]) %>
+    <% question_list = exercise_questions.includes(:exercise_shixun_answers, :exercise_choices => [:exercise_answers]) %>
     <% question_list.each do |exercise_question| %>
       <div class="question_item_con font-14 user_bg_shadow bor-grey-e mb20 pt15">
         <div class="clearfix pl15 pr15">
diff --git a/db/migrate/20190417024319_create_exercise_level_settings.rb b/db/migrate/20190417024319_create_exercise_level_settings.rb
new file mode 100644
index 00000000..6aaa349f
--- /dev/null
+++ b/db/migrate/20190417024319_create_exercise_level_settings.rb
@@ -0,0 +1,19 @@
+class CreateExerciseLevelSettings < ActiveRecord::Migration
+  def change
+    create_table :exercise_level_settings do |t|
+      t.references :exercise
+      t.integer :level, default: 1
+      t.integer :score, default: 0
+      t.integer :num, default: 0
+
+      t.timestamps
+    end
+    add_index :exercise_level_settings, :exercise_id
+
+    Exercise.find_each do |exercise|
+      shixun_questions = exercise.exercise_questions.where(question_type: 5)
+      exercise.exercise_level_settings << ExerciseLevelSetting.new(level: 1, score: shixun_questions.map(&:question_score).min,
+                                                                   num: shixun_questions.count)
+    end
+  end
+end
diff --git a/db/migrate/20190417024510_add_exercise_level_setting_to_question.rb b/db/migrate/20190417024510_add_exercise_level_setting_to_question.rb
new file mode 100644
index 00000000..33611a73
--- /dev/null
+++ b/db/migrate/20190417024510_add_exercise_level_setting_to_question.rb
@@ -0,0 +1,12 @@
+class AddExerciseLevelSettingToQuestion < ActiveRecord::Migration
+  def change
+    add_column :exercise_questions, :exercise_level_setting_id, :integer, default: 0
+    add_column :exercise_questions, :level, :integer, default: 1
+
+    add_index :exercise_questions, :exercise_level_setting_id
+
+    ExerciseQuestion.where(question_type: 5).find_each do |question|
+      question.update_attributes(exercise_level_setting_id: question.exercise.exercise_level_settings.first.try(:id)) if question.exercise.present?
+    end
+  end
+end
diff --git a/db/migrate/20190417024736_create_question_count.rb b/db/migrate/20190417024736_create_question_count.rb
new file mode 100644
index 00000000..6653a929
--- /dev/null
+++ b/db/migrate/20190417024736_create_question_count.rb
@@ -0,0 +1,13 @@
+class CreateQuestionCount < ActiveRecord::Migration
+  def up
+    add_column :exercise_level_settings, :exercise_questions_count, :integer, :default => 0
+
+    ExerciseLevelSetting.reset_column_information
+    ExerciseLevelSetting.find_each do |s|
+      ExerciseLevelSetting.reset_counters s.id, :exercise_questions
+    end
+  end
+
+  def down
+  end
+end
diff --git a/db/migrate/20190417033935_create_exercise_user_questions.rb b/db/migrate/20190417033935_create_exercise_user_questions.rb
new file mode 100644
index 00000000..950f2ab7
--- /dev/null
+++ b/db/migrate/20190417033935_create_exercise_user_questions.rb
@@ -0,0 +1,14 @@
+class CreateExerciseUserQuestions < ActiveRecord::Migration
+  def change
+    create_table :exercise_user_questions do |t|
+      t.references :exercise
+      t.references :exercise_user
+      t.references :exercise_question
+
+      t.timestamps
+    end
+    add_index :exercise_user_questions, :exercise_id
+    add_index :exercise_user_questions, :exercise_user_id
+    add_index :exercise_user_questions, :exercise_question_id
+  end
+end
diff --git a/spec/factories/exercise_level_settings.rb b/spec/factories/exercise_level_settings.rb
new file mode 100644
index 00000000..a412882c
--- /dev/null
+++ b/spec/factories/exercise_level_settings.rb
@@ -0,0 +1,8 @@
+FactoryGirl.define do
+  factory :exercise_level_setting do
+    exercise nil
+    level 1
+    score 1
+    num 1
+  end
+end
diff --git a/spec/factories/exercise_user_questions.rb b/spec/factories/exercise_user_questions.rb
new file mode 100644
index 00000000..493cdb0d
--- /dev/null
+++ b/spec/factories/exercise_user_questions.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :exercise_user_question do
+    exercise nil
+    exercise_user nil
+    exercise_question nil
+  end
+end
diff --git a/spec/models/exercise_level_setting_spec.rb b/spec/models/exercise_level_setting_spec.rb
new file mode 100644
index 00000000..ea20df40
--- /dev/null
+++ b/spec/models/exercise_level_setting_spec.rb
@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe ExerciseLevelSetting, :type => :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end
diff --git a/spec/models/exercise_user_question_spec.rb b/spec/models/exercise_user_question_spec.rb
new file mode 100644
index 00000000..00e111c3
--- /dev/null
+++ b/spec/models/exercise_user_question_spec.rb
@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe ExerciseUserQuestion, :type => :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end