删除某一题目后，后面的题目序号自动-1，以及页面js的刷新

app/controllers/poll_controller.rb

@@ -120,7 +120,8 @@ class PollController < ApplicationController
   #删除单选题
   def delete_poll_question
     @poll_question = PollQuestion.find params[:poll_question]
-    poll_questions = @poll_question.poll.poll_questions.where("question_number > #{@poll_question.question_number}")
+    @poll = @poll_question.poll
+    poll_questions = @poll.poll_questions.where("question_number > #{@poll_question.question_number}")
     poll_questions.each do |question|
       question.question_number -= 1
       question.save

app/views/poll/_poll_content.html.erb

@@ -0,0 +1,10 @@
+<% poll.poll_questions.each do |poll_question|%>
+    <div id="poll_questions_<%= poll_question.id%>">
+      <div id="show_poll_questions_<%= poll_question.id %>">
+        <%= render :partial => 'show_MC', :locals => {:poll_question => poll_question} %>
+      </div>
+      <div id="edit_poll_questions_<%= poll_question.id %>" style="display: none;">
+        <%= render :partial => 'edit_MC', :locals => {:poll_question => poll_question} %>
+      </div>
+    </div>
+<% end %>

app/views/poll/_poll_form.html.erb

@@ -96,16 +96,7 @@
 
   <!-- 问题 -->
   <div id="poll_content">
-    <% @poll.poll_questions.each do |poll_question|%>
+    <%= render :partial => 'poll_content', :locals => {:poll => @poll}%>
-        <div id="poll_questions_<%= poll_question.id%>">
-          <div id="show_poll_questions_<%= poll_question.id %>">
-            <%= render :partial => 'show_MC', :locals => {:poll_question => poll_question} %>
-          </div>
-          <div id="edit_poll_questions_<%= poll_question.id %>" style="display: none;">
-            <%= render :partial => 'edit_MC', :locals => {:poll_question => poll_question} %>
-          </div>
-        </div>
-    <% end %>
   </div>
 
   <!-- 新增问题 -->

app/views/poll/delete_poll_question.js.erb

@@ -1 +1 @@
-$("#poll_questions_<%= @poll_question.id%>").remove();
+$("#poll_content").html("<%= escape_javascript(render :partial => 'poll_content', :locals => {:poll => @poll}) %>");