只有编辑的时候才允许删除资源

app/views/blog_comments/show.html.erb

@@ -81,7 +81,7 @@
       <div class=" fl" style="width: 600px">
         <%#= link_to_attachments_course @topic, :author => false %>
         <% if @article.attachments.any?%>
-            <% options = {:author => true, :deletable => true} %>
+            <% options = {:author => true, :deletable => false} %>
             <%= render :partial => 'blog_comments/attachments_links', :locals => {:attachments => @article.attachments, :options => options, :is_float => true} %>
         <% end %>
       </div>