FactoryGirl为深层嵌套关联指定create_list计数

Question

以下是关联设置：

• 类别有很多章节
• 章节有很多页面
• 页面有一个文本或音频

我想在类别级别生成记录，并指定章节数，页数和可选的文本或音频记录。

我知道使用create_list指定第一级关联（章节）。有没有办法指定更深层关联的计数？最初的想法告诉我嵌套after（：create）。这是正确的方法吗？

FactoryGirl.define do
    factory :category do
        ignore do
            chapters_count 1
        end

        trait :with_chapters do
            after(:create) do |instance, evaluator|
                create_list :chapter, evaluator.chapters_count, category: instance
            end
        end

        trait :with_chapters_and_pages do
            ...?
        end

        trait :with_chapters_and_pages_with_text do
            ...?
        end

        trait :with_chapters_and_pages_with_audio do
            ...?
        end
    end
end

Answer 1

在使用FactoryGirl并阅读语法/ methods.rb代码之后，我想出了一个可行的解决方案。如果其他人有更好的方法，请分享:)

# category_factory.rb
FactoryGirl.define do
    # Fields
    # --------------------------------------------------
    (...)

    # Transient Attributes
    # --------------------------------------------------
    ignore do
        chapter_count   1               # Number of associated Chapters to create
        page_count      1               # Number of Chapter associated Pages to create
        page_type       :with_text      # Page type either :with_text (default) or :with_audio
    end

    # Traits
    # --------------------------------------------------
    trait :with_chapter do
        after(:create) do |instance, evaluator|
            create_list :chapter, evaluator.chapter_count, category: instance
        end
    end

    trait :with_chapter_and_page do
        after(:create) do |instance, evaluator|
            create_list :chapter, evaluator.chapter_count, :with_page, category: instance, page_count: evaluator.page_count, page_type: evaluator.page_type
        end
    end
end

# chapter_factory.rb
FactoryGirl.define do
    # Fields
    # --------------------------------------------------
    (...)
    category

    # Transient Attributes
    # --------------------------------------------------
    ignore do
        page_count  1           # Number of Chapter associated pages to create
        page_type   :with_text  # Page type either :with_text (default) or :with_audio
    end

    # Traits
    # --------------------------------------------------
    trait :with_page do
        after(:create) do |instance, evaluator|
            create_list :page, evaluator.page_count, evaluator.page_type, chapter: instance
        end
    end
end

# page_factory.rb
FactoryGirl.define do
    # Fields
    # --------------------------------------------------
    (...)
    chapter

    # Traits
    # --------------------------------------------------
    trait :with_text do
        after(:create) do |instance, evaluator|
            create :text, page: instance
        end
    end

    trait :with_audio do
        after(:create) do |instance, evaluator|
            create :audio, page: instance
        end
    end
end

# text_factory.rb & audio_factory.rb
(...)

瞬态属性有一些重复。不知道怎么干它...