全站搜索资源后列表中只能删除当前课程的资源，且需有删除资源的权限

app/views/files/_course_list.html.erb

@@ -35,7 +35,7 @@
       <div class="">
         <p class="f_l c_grey02">文件大小：<%= number_to_human_size(file.filesize) %></p>
         <%= link_to( l(:button_delete), attachment_path(file),
-                     :data => {:confirm => l(:text_are_you_sure)}, :method => :delete,:class => "f_r re_de") if delete_allowed %>
+                     :data => {:confirm => l(:text_are_you_sure)}, :method => :delete,:class => "f_r re_de") if delete_allowed && file.container_id == @course.id && file.container_type == "Course"%>
         <p class="f_r c_grey02" ><%= time_tag(file.created_on).html_safe %><%= l(:label_bids_published_ago) %>&nbsp;&nbsp;|&nbsp;&nbsp;下载<%= file.downloads %>&nbsp;&nbsp;|&nbsp;&nbsp;引用0 </p>
       </div>
       <div class="cl"></div>