Rails - Jun 2006 - Cleaner way to do this

is there a cleaner way to achieve this? // Is this the correct way?

def show_servers

  @server_pages, @switch_servers = paginate :servers, :conditions=>["id
in
(select server_id from server_interfaces where
server_interfaces.switch_interface_id in (select id from switch_interfaces
where switch_id = ?) )",params[:id]], :per_page => 20, :order =>
"name"

  render :layout=>false
end


I feel like I''m putting to much sql code for a rails application   :-)

Thanks.