ruby-on-rails - FactoryGirl 与多个模型的复杂关联

Question

我试图弄清楚如何编写属于 2 个不同模型的工厂，每个模型都应该具有相同的父模型。这是人为的示例代码:

class User < ActiveRecord::Base
  has_many :widgets
  has_many :suppliers

  attr_accessible :username
end

class Widget < ActiveRecord::Base
  belongs_to :user
  has_many :parts

  attr_accessible :name
end

class Supplier < ActiveRecord::Base
  belongs_to :user
  has_many :parts

  attr_accessible :name
end

class Part < ActiveRecord::Base
  belongs_to :supplier
  belongs_to :widget

  attr_accessible :name
end

这是我到目前为止所拥有的:

factory :user do
  name 'foo'
end

factory :widget do
  association :user
  name 'widget'
end

factory :supplier do
  association :user
  name 'supplier'
end

factory :part do
  association :widget
  association :supplier
  name 'part'
end

问题在于 part.widget.user != part.supplier.user它们必须相同。

我尝试了以下方法但没有成功:

factory :part do
  association :widget
  association :supplier, user: widget.user
  name 'part'
end

有什么建议？还是必须在创建零件后对其进行修改？

谢谢

Answer 1

我相信你可以用 callback 做到这一点:

factory :part do
  association :widget
  association :supplier
  name 'part'
  after(:create) do |part|
    user = FactoryGirl.create(:user)
    part.widget.user = part.supplier.user = user
  end
end

另见: Get two associations within a Factory to share another association