diff --git a/db/migrate/20191021154016_migrate_2734_exercise_answer_score.rb b/db/migrate/20191021154016_migrate_2734_exercise_answer_score.rb
new file mode 100644
index 000000000..344233dd1
--- /dev/null
+++ b/db/migrate/20191021154016_migrate_2734_exercise_answer_score.rb
@@ -0,0 +1,113 @@
+class Migrate2734ExerciseAnswerScore < ActiveRecord::Migration[5.2]
+  def challenge_path(path)
+    cha_path = path.present? ? path.split("；") : []
+    cha_path.reject(&:blank?)[0].try(:strip)
+  end
+
+  # 版本库文件内容，带转码
+  def git_fle_content(repo_path, path)
+    begin
+      Rails.logger.info("git file content: repo_path is #{repo_path}, path is #{path}")
+
+      content = GitService.file_content(repo_path: repo_path, path: path)
+
+      Rails.logger.info("git file content: content is #{content}")
+      decode_content = nil
+      if content.present?
+        content = content["content"]   #6.24 -hs 这个为新增，因为当实训题里含有选择题时，这里会报错,undefined method `[]' for nil:NilClass
+
+        content = Base64.decode64(content)
+        cd = CharDet.detect(content)
+        Rails.logger.info "encoding: #{cd['encoding']} confidence: #{cd['confidence']}"
+        # 字符编码问题，GB18030编码识别率不行
+        decode_content =
+          if cd["encoding"] == 'GB18030' && cd['confidence'] > 0.8
+            content.encode('UTF-8', 'GBK', {:invalid => :replace, :undef => :replace, :replace => ' '})
+          else
+            content.force_encoding('UTF-8')
+          end
+      end
+
+      decode_content
+
+    rescue Exception => e
+      Rails.logger.error(e.message)
+      raise Educoder::TipException.new("文档内容获取异常")
+    end
+  end
+
+  def calculate_student_score(exercise,user)
+    score5 = 0.0  #实训题
+    exercise_questions = exercise.exercise_questions.includes(:exercise_standard_answers,:exercise_shixun_challenges)
+    exercise_questions.each do |q|
+      if q.question_type == 5
+        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
+            if game.final_score > 0 && game.end_time < exercise.end_time
+              exercise_cha_score = game.real_score(exercise_cha.question_score)
+              # exercise_cha_score = exercise_cha.question_score #每一关卡的得分
+              answer_status = 1
+            end
+            ex_shixun_answer_content = exercise_cha.exercise_shixun_answers.where(user_id:user.id,exercise_question_id:q.id)
+            code = nil
+            if exercise_cha.challenge&.path.present?
+              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
+                begin
+                  code = git_fle_content(game.myshixun.repo_path,cha_path)
+                rescue
+                  code = ""
+                end
+              end
+            end
+            if ex_shixun_answer_content.blank?  #把关卡的答案存入试卷的实训里
+              ### Todo 实训题的_shixun_details里的代码是不是直接从这里取出就可以了？涉及到code的多个版本库的修改
+              sx_option = {
+                :exercise_question_id => q.id,
+                :exercise_shixun_challenge_id => exercise_cha.id,
+                :user_id => user.id,
+                :score => exercise_cha_score.round(1),
+                :answer_text => code,
+                :status => answer_status
+              }
+              ExerciseShixunAnswer.create!(sx_option)
+            else
+              ex_shixun_answer_content.first.update_attributes!(score:exercise_cha_score.round(1),answer_text:code,status:answer_status)
+            end
+            score5 += exercise_cha_score
+          else
+            score5 += 0.0
+          end
+        end
+      end
+    end
+    score5
+  end
+
+  def change
+    exercise = Exercise.find_by(id: 2734)
+    if exercise
+      exercise_users = exercise.exercise_users.where("start_at is not null")
+      exercise_users.each do |exercise_user|
+        calculate_score = calculate_student_score(exercise, exercise_user.user)
+        subjective_score = exercise_user.subjective_score
+        total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
+        total_score = calculate_score + total_score_subjective_score
+        if exercise_user.end_at.nil?
+          exercise_user.update_attributes!(score:total_score,objective_score:calculate_score,end_at:exercise.end_time,commit_status:1,status:1,commit_method:3)
+        else
+            exercise_user.update_attributes!(score:total_score,objective_score:calculate_score)
+        end
+        puts exercise_user.id
+      end
+    end
+  end
+end