FactoryGirl关联模型故障:"SystemStackError:堆栈级别太深"

Question

我正在使用Ruby on Rails 3.0.9,RSpec-rails 2和FactoryGirl.我试图陈述一个工厂协会模型,但我遇到了麻烦.

我有一个factories/user.rb如下文件:

FactoryGirl.define do
  factory :user, :class => User do
    attribute_1
    attribute_2
    ...

    association :account, :factory => :users_account, :method => :build, :email => 'foo@bar.com'
  end
end

和以下factories/users/account.rb文件:

FactoryGirl.define do
  factory :users_account, :class => Users::Account do
    sequence(:email) {|n| "foo#{n}@bar.com" }
    ...
  end
end

上面的示例在我的spec文件中按预期工作,但如果在factory :users_account语句中我添加了association :user代码,那么

FactoryGirl.define do
  factory :users_account, :class => Users::Account do
    sequence(:email) {|n| "foo#{n}@bar.com" }
    ...
    association      :user
  end
end

我收到以下错误:

Failure/Error: Unable to find matching line from backtrace
SystemStackError:
  stack level too deep

如何解决这个问题,以便从双方\工厂访问相关模型(也就是说,在我的规范文件中,我想使用像user.account和的RoR关联模型方法account.user)？

PS:我读过" 工厂女孩"并且有一个问题,我的案子与链接问题中解释的情况非常接近.也就是说,我也有一个has_one关联(在User和Users::Account类之间).

Answer 1

根据文档,你不能只把协会的两边都放进工厂.您需要使用它们的after回调来设置要返回的对象.

例如,在factories/users/account.rb文件中,你放了类似的东西

after(:build) do |user_account, evaluator|
    user_account.user = FactoryGirl.build(:user, :account=>user_account)
end

对于has_many关联,您需要使用他们的*_list函数.

after(:build) do |user_account, evaluator|
    user_account.users = FactoryGirl.build_list(:user, 5, :account=>user_account)
end

注意:我认为文档中的示例有点误导,它没有为对象分配任何内容.我相信应该是这样的(注意作业).

# the after(:create) yields two values; the user instance itself and the
# evaluator, which stores all values from the factory, including ignored
# attributes; `create_list`'s second argument is the number of records
# to create and we make sure the user is associated properly to the post
after(:create) do |user, evaluator|
  user.posts = FactoryGirl.create_list(:post, evaluator.posts_count, user: user)
end