object @product
attributes *product_attributes
child :variants_including_master => :variants do
  attributes *variant_attributes

  child :option_values => :option_values do
    attributes *option_value_attributes
  end
end

child :images => :images do
  attributes *image_attributes
end

child :option_types => :option_types do
  attributes *option_type_attributes

  child :option_values => :option_values do
    attributes *option_value_attributes
  end
end