# File lib/ancestry/instance_methods.rb, line 60
    def child_ancestry
      # New records cannot have children
      raise Ancestry::AncestryException.new('No child ancestry for new record. Save record before performing tree operations.') if new_record?

      if self.send("#{self.base_class.ancestry_column}_was").blank? then id.to_s else "#{self.send "#{self.base_class.ancestry_column}_was"}/#{id}" end
    end