试卷的统计结果，填空题的正确率修复

app/helpers/exercises_helper.rb

@@ -143,15 +143,15 @@ module ExercisesHelper
             right_user_ids = right_user_ids & effictive_users.select{|answer| answer.exercise_choice_id == standard_answer_choice_id}.pluck(:user_id)
           end
           right_users_count = right_user_ids.size
-          right_users_scores = right_users_count * ex&.question_score.to_f
+          # right_users_scores = right_users_count * ex&.question_score.to_f
         else  #单选题和判断题
           standard_answer_choice_id = ex_choices.select{|ec| ec.choice_position == standard_answer.first}.first&.id
           right_users_count = effictive_users.select{|answer| answer.exercise_choice_id == standard_answer_choice_id}.size
-          right_users_scores = right_users_count * ex&.question_score.to_f
+          # right_users_scores = right_users_count * ex&.question_score.to_f
         end
-        percent = (ex_total_score == 0.0 ? 0.0 : (right_users_scores / ex_total_score.to_f).round(3) * 100)  #正确率
+        # percent = (ex_total_score == 0.0 ? 0.0 : (right_users_scores / ex_total_score.to_f).round(3) * 100)  #正确率
 
-        # percent = commit_user_ids > 0 ? (right_users_count / commit_user_ids.to_f).round(3)*100 : 0.0
+        percent = commit_user_ids > 0 ? (right_users_count / commit_user_ids.to_f).round(3)*100 : 0.0
 
         #每个选项的正确率
         ex_choices.each do |c|
@@ -175,7 +175,7 @@ module ExercisesHelper
         null_stand_choice = null_standard_answer.pluck(:exercise_choice_id)  #一个exercise_choice_id可能对应多个answer_text
         null_stand_text = null_standard_answer.pluck(:answer_text)
         standard_answer_count = 0
-        each_null_score = null_stand_choice.size > 0 ? (ex&.question_score.to_f / null_stand_choice.size).round(3) : 0.0
+        each_null_score = null_stand_choice.size > 0 ? (ex&.question_score.to_f / null_stand_choice.uniq.size).round(3) : 0.0
         all_user_count = 0
         null_stand_choice.each_with_index do |s,index|
           user_count = 0