FactoryGirl：填充具有许多关系的保留构建策略

我的问题似乎很常见，但我没有在文档或互联网本身中找到任何答案。

这似乎是这个问题的克隆has_many 同时尊重factory_girl 中的构建策略 https://stackoverflow.com/questions/1506556/has-many-while-respecting-build-strategy-in-factory-girl但 2.5 年后，factory_girl 发生了很大变化。

我有一个具有 has_many 关系的模型，称为照片。我想填充这与保留我对构建策略的选择有很多关系。

如果我打电话offering = FactoryGirl.build_stubbed :offering, :stay我预计offering.photos成为存根模型的集合。

我发现实现这一目标的唯一方法是：

factory :offering do
  association :partner, factory: :named_partner
  association :destination, factory: :geolocated_destination

  trait :stay do
    title "Hotel Gran Vía"
    description "Great hotel in a great zone with great views"
    offering_type 'stay'
    price 65
    rooms 70
    stars 4
    event_spaces 3
    photos do
      case @build_strategy
      when FactoryGirl::Strategy::Create then [FactoryGirl.create(:hotel_photo)]
      when FactoryGirl::Strategy::Build then [FactoryGirl.build(:hotel_photo)]
      when FactoryGirl::Strategy::Stub then [FactoryGirl.build_stubbed(:hotel_photo)]
      end
    end
  end
end

不用说，一定存在更好的方法来做到这一点。

Ideas?

您可以使用各种 FactoryGirl 回调：

factory :offering do
  association :partner, factory: :named_partner
  association :destination, factory: :geolocated_destination

  trait :stay do
    title "Hotel Gran Vía"
    description "Great hotel in a great zone with great views"
    offering_type 'stay'
    price 65
    rooms 70
    stars 4
    event_spaces 3
    after(:stub) do |offering|
      offering.photos = [build_stubbed(:hotel_photo)]
    end
    after(:build) do |offering|
      offering.photos = [build(:hotel_photo)]
    end
    after(:create) do |offering|
      offering.photos = [create(:hotel_photo)]
    end
  end
end