请教一下关于 redmine 自动加载附件图片的问题

[xxy023]

版本 redmine3.4.6，系统 windows server 8

在网上搜到是在 apps\redmine\htdocs\app\views\attachments_links.html.erb 文件下加以下代码块，但是重启 redmine 之后图片预览失败，请问有人知道怎么解决吗？

<% images = attachments.select { |a| a.image? } %>

<% unless images.empty? %>

<% images.each do |attachment| %> <%= link_to image_tag(url_for({:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename })), {:controller => 'attachments', :action => 'show', :id => attachment, :filename => attachment.filename }, :class => 'lightbox', :rel => 'attachments', :title => "#{attachment.filename}#{ ('-' + attachment.description) unless attachment.description.blank? }" %> <% end -%>

<% end -%>

[xxy023]

放弃了改源码，装了插件解决了需求