# File lib/model.rb, line 160
  def to_yaml opts={}
    YAML::quick_emit(object_id, opts) do |out|
      out.map(taguri, nil) do |map|
        self.class.fields.each do |f, fops|
          v = if @serialized_values.member?(f)
            @serialized_values[f]
          else
            @serialized_values[f] = serialized_form_of f, @values[f]
          end

          map.add f.to_s, v
        end
      end
    end
  end