<% fieldname_p = fieldname.pluralize %> <%= f.label "fieldname", t('admin.'+fieldname) %>

<% object.send(fieldname_p).each do |t| %>
• <%= t.file_filename %> <%=fields_for "design["+(fieldname_p)+"][]",t,:index=>nil do |f| %> <%= f.hidden_field :id %> <%= f.hidden_field :to_destroy %> <%end%> Del
<% end %>

<%= fields_for "design["+(fieldname_p)+"][]", object, :index => nil do |f| %> <%= f.file_field :file ,{:class=>"multi_files",:rtype=>rtype}%> <% end %>