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n350071🇯🇵
n350071🇯🇵

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[RSpec] Factorybot trait, making a complex association data

#rails

🤔 Situation 

 class Author has_many :books has_many :title_covers, through: :book end class Book belongs_to :author has_many :title_covers end class TitleCover belongs_to :author belongs_to :book end
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👍 Solution

preparing 

 FactoryBot.define do factory :author, class: Author do trait :with_a_book_and_title_covers do after(:build) do |author| author.books << FactoryBot.build(:book, :with_title_covers) end end end end FactoryBot.define do factory :book, class: Book do trait :with_title_covers do after(:build) do |book| book.title_covers = FactoryBot.build_list(:title_cover, 2) end end end end
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Note1: << for build, = for build_list to make the relations.
Note2: if you use after(:create), don't forget to .save.

🎉 Use it

You can easily make an array of author which has a book that has two book covers, and the author name is n350071.

 let(:author){ create(:author, :with_a_book_and_title_covers, name: 'n350071') }
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📚 References

🔗 Parent Note

n350071

my RSpec note

n350071🇯🇵 ・ Oct 8 '19

#rails

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