去掉试卷的空白标准答案

app/helpers/exercises_helper.rb

@@ -181,7 +181,7 @@ module ExercisesHelper
         ex_ordered = ex.is_ordered
         null_standard_answer = ex.exercise_standard_answers
         null_stand_choice = null_standard_answer.pluck(:exercise_choice_id).uniq  #一个exercise_choice_id可能对应多个answer_text
-        null_stand_text = null_standard_answer.pluck(:answer_text)
+        null_stand_text = null_standard_answer.pluck(:answer_text).reject(&:blank?)
         standard_answer_count = 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
@@ -191,13 +191,6 @@ module ExercisesHelper
             user_count = 0
             s_choice_text = null_stand_text[index]
             user_count = user_count + effictive_users.select{|answer| answer.exercise_choice_id == s && answer.answer_text == s_choice_text}.size
-            # if ex_ordered #有序排列,或者有重复答案的时候，不按无序排列
-            #
-            # else
-            #   # null_stand_text = null_stand_text.uniq
-            #   s_choice_text = null_stand_text[index]
-            #   user_count = user_count + effictive_users.select{|answer| answer.answer_text == s_choice_text }.size  #回答了标准答案的用户
-            # end
 
             answer_percent = ((effictive_users_count == 0) ? 0.0 : (user_count / effictive_users_count.to_f ).round(3))
             answer_option = {