Orbit/app/views/admin/designs/_design_file.html.erb

<% item_destroy ||= false %>
<% item_snapshot ||= false %>
<% li_class = ''%>

<% fieldname_p = fieldname.pluralize  %>
<%= f.label "fieldname", t('admin.'+fieldname) %>
<ul>
  <% object.send(fieldname_p).each do |t| %>
    <% li_class += 'r_destroy ' if item_destroy  %>
    <% li_class += 'r_snapshot ' if item_snapshot %>
    <li class="<%= li_class %>"> <%= t.file_filename %>
    <% if item_destroy  %>
      <%=fields_for "design["+fieldname_p+"][]",t,:index=>nil do |f| %>
      <%= f.hidden_field :id %>
      <%= f.hidden_field :to_destroy %>
    <%end%>
      <a class="remove_mark" href="#"><%= t('Delete') %></a>
    <% end  %>
    </li>
  <% end %>
</ul>
<%= fields_for "design["+fieldname_p+"][]", object, :index => nil do |f| %>
  <%= f.file_field :file ,{:class=>"multi_files",:rtype=>rtype}%>
<% end %>