class RecordsController < ApplicationController active_scaffold :record do |conf| conf.sti_children = [:SOA, :NS] conf.columns = [:name, :type, :content, :ttl, :prio, :change_date] end before_filter :ensure_nested_under_domain protected def beginning_of_chain super.readonly(false) end def ensure_nested_under_domain raise CanCan::AccessDenied, "not found" unless nested? and nested_parent_record.is_a?(Domain) end end