课程模块缓存的设置，，

具体课程的，课程通知，课程作业，资源库以及留言模块的缓存优化。
Signed-off-by: alanlong9278 <547533434@qq.com>

app/views/courses/_courses_jours.html.erb

@@ -1,4 +1,5 @@
 <%= javascript_include_tag "/assets/kindeditor/kindeditor" %>
+<% cache [:courses_jours, @course] do%>
 <div class="msg_box" id='leave-message'>
   <%# reply_allow = JournalsForMessage.create_by_user? User.current %>
   <h4><%= l(:label_leave_message) %></h4>
@@ -22,10 +23,12 @@
         <% end %>
   <% end %>
 </div>
-
+<% end %>
+<% cache [:courses_jours_list, @jour.size ] do %>
 <div id="history">
   <%= render :partial => 'history',:locals => { :contest => @contest, :journals => @jour, :state => false} %>
 </div>
+<% end %>
 <ul class="wlist">
   <%= pagination_links_full @obj_pages, @obj_count, :per_page_links => false, :remote => false, :flag => true%>
 </ul>

app/views/files/_course_file.html.erb

@@ -63,11 +63,14 @@
 
 <div class="container">
   <div class="resource"><!--资源库内容开始--->
+
     <div class="re_top">
-      <%= form_tag( search_course_files_path(@course), method: 'get',:class => "re_search f_l",:remote=>true) do %>
-          <%= text_field_tag 'name', params[:name], name: "name", :class => 're_schbox',:style=>"padding: 0px"%>
-          <%= submit_tag "课内搜索", :class => "re_schbtn b_lblue",:name => "incourse",:id => "incourse", :onmouseover => "presscss('incourse')",:onmouseout =>"buttoncss()" %>
-          <%= submit_tag "全站搜索", :class => "re_schbtn b_lblue",:name => "insite",:id => "insite",:onmouseover => "presscss('insite')",:onmouseout =>"buttoncss()" %>
+      <% cache [:course_file_search, @course] do %>
+          <%= form_tag( search_course_files_path(@course), method: 'get',:class => "re_search f_l",:remote=>true) do %>
+              <%= text_field_tag 'name', params[:name], name: "name", :class => 're_schbox',:style=>"padding: 0px"%>
+              <%= submit_tag "课内搜索", :class => "re_schbtn b_lblue",:name => "incourse",:id => "incourse", :onmouseover => "presscss('incourse')",:onmouseout =>"buttoncss()" %>
+              <%= submit_tag "全站搜索", :class => "re_schbtn b_lblue",:name => "insite",:id => "insite",:onmouseover => "presscss('insite')",:onmouseout =>"buttoncss()" %>
+          <% end %>
       <% end %>
       <% if is_course_teacher(User.current,@course) %>  <!-- show_window('light','fade','20%','35%')-->
           <!--<a href="javascript:void(0)" class="re_fabu f_r b_lblue" onclick="show_upload();">上传资源</a>-->
@@ -82,11 +85,11 @@
       <% end %>
     </div><!---re_top end-->
     <div class="cl"></div>
-
+    <% cache [:course_file_list, @obj_attachments.max().updated_at] do %>
     <div class="re_con" id="course_list">
       <%= render :partial => 'course_list',:locals => {course: @course,all_attachments: @all_attachments,sort:@sort,order:@order,curse_attachments:@obj_attachments}  %>
     </div><!---re_con end-->
-
+    <% end %>
   </div>
 </div>
 <% html_title(l(:label_attachment_plural)) -%>

app/views/news/_course_news.html.erb

@@ -20,11 +20,13 @@
 </div>
 
 <div>
+
   <% if @newss.empty? %>
       <p class="nodata">
         <%= l(:label_no_data) %>
       </p>
   <% else %>
+      <% cache [:course_news, @newss.max().created_at] do%>
       <% @newss.each do |news| %>
           <div class="problem_main upload_img">
             <%= link_to image_tag(url_to_avatar(news.author),:width => 42,:height => 42), user_path(news.author), :class => "problem_pic fl" %>
@@ -55,6 +57,7 @@
           </div><!--problem_main end-->
 
       <% end %>
+      <% end %>
   <% end %>
 </div>
 <!--end-->