多项选择标准答案

app/controllers/exercise_controller.rb

@@ -146,7 +146,13 @@ class ExerciseController < ApplicationController
     if @exercise_questions.save
       standart_answer = ExerciseStandardAnswer.new
       standart_answer.exercise_question_id =  @exercise_questions.id
-      @exercise_questions.question_type == 3 ? standart_answer.answer_text = translate_standard_answer(params[:exercise_choice]) : standart_answer.exercise_choice_id = sigle_selection_standard_answer(params[:exercise_choice])
+      if @exercise_questions.question_type == 1
+        standart_answer.exercise_choice_id = sigle_selection_standard_answer(params[:exercise_choice])
+      elsif @exercise_questions.question_type == 2
+        standart_answer.exercise_choice_id = multiselect_standard_answer(params[:exercise_choice])
+      else
+        standart_answer.answer_text = sigle_selection_standard_answer(params[:exercise_choice])
+      end
       standart_answer.save
       respond_to do |format|
         format.js

app/helpers/exercise_helper.rb

@@ -4,7 +4,7 @@ module ExerciseHelper
   # 单选
   def sigle_selection_standard_answer(params)
     size = params.ord - 96
-    if size > 0
+    if size > 0 # 小写字母答案
       answer = params.ord - 96
     else
       answer = params.ord - 64
@@ -13,7 +13,18 @@ module ExerciseHelper
 
   # 多选
   def multiselect_standard_answer(params)
-    answer = params.ord
+    size = params.ord - 96
+    answer = ""
+    if size > 0 # 小写字母答案
+      for i in 0..(params.length-1)
+        answer += (params[i].ord - 96).to_s
+      end
+    else
+      for i in 0..(params.length-1)
+        answer += (params[i].ord - 64).to_s
+      end
+    end
+    answer.to_i
   end
 
   #判断用户是否已经提交了问卷