fix but

app/helpers/exercises_helper.rb

@@ -413,43 +413,41 @@ module ExercisesHelper
           score2 += 0.0
         end
       elsif q.question_type == 5   #实训题时，主观题这里不评分
-        if answers_content.present?
-          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)
+        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
-                ex_shixun_answer_content.first.update_column('score',exercise_cha_score)
+                code = git_fle_content(exercise_cha.shixun.repo_path,cha_path)
               end
-              score5 += exercise_cha_score
+              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
+              ex_shixun_answer_content.first.update_column('score',exercise_cha_score)
             end
+            score5 += exercise_cha_score
+          else
+            score5 += 0.0
           end
-        else
-          score5 += 0.0
         end
       end
       user_scores = answers_content.present? ? answers_content.score_reviewed.pluck(:score).sum : 0.0