factory :car do
    name 'Some car'
    engine_value 1.6
    color '#ff0000'
    car_type
    engine_type
    transmission
    drive_type
    material
end

如你所见,有很多相关的对象.但是代码

attributes_for(:car)

仅生成：name =>“Some car”,：engine_value => 1.6,：color =>“#ff0000”}哈希.我需要获得具有所有属性的哈希.我该怎么做？谢谢.