增加问卷修改功能，以及相关js

app/controllers/poll_controller.rb

@@ -1,5 +1,5 @@
 class PollController < ApplicationController
-  before_filter :find_poll_and_course, :only => [:edit,:update,:destory]
+  before_filter :find_poll_and_course, :only => [:edit,:update,:destroy]
   before_filter :find_container, :only => [:new,:create, :index]
 
   def index
@@ -59,7 +59,7 @@ class PollController < ApplicationController
   end
 
   def destroy
-    if @poll.destroy
+    if @poll && @poll.destroy
       respond_to do |format|
         format.js
       end

app/views/poll/destroy.js.erb

@@ -1 +1,4 @@
-alert("删除成功");
+<% if @poll%>
+    $("#polls_<%= @poll.id%>").remove();
+<%else%>
+<% end %>

app/views/poll/index.html.erb

@@ -17,17 +17,20 @@
   <div class="cl"></div>
   <div class="polls_list">
     <% @polls.each do |poll|%>
-        <ul>
+        <ul id="polls_<%= poll.id %>">
           <li>
             <a href="#" class="polls_title fl">
               <%= poll.polls_name%>
             </a>
           </li>
           <li>
-            <a href="#" class="pollsbtn fl ml10">统计结果</a>
+            <a href="#" class="pollsbtn fl ml10">
+              <%= l(:label_statistical_results)%>
+            </a>
           </li>
           <li>
-            <a href="#" class="polls_de fr ml20 mr10">删除</a>
+            <%= link_to(l(:button_delete), poll,
+                        method: :delete, :confirm => l(:text_are_you_sure), :remote => true, :class => "polls_de fr ml20 mr10")  %>
           </li>
           <li class="polls_date fr">
             <%= format_time poll.created_at%>

config/locales/zh.yml

@@ -2244,4 +2244,5 @@ zh:
   label_poll_new: 未命名问卷
   label_poll: 问卷调查
   label_new_poll: 新建问卷
+  label_statistical_results: 统计结果