ruby-on-rails - 工厂女孩的额外论据

Question

我需要将额外的参数传递给工厂女孩以在回调中使用。像这样的东西（但实际上更复杂）：

Factory.define :blog do |blog|
  blog.name "Blah"

  blog.after_create do |blog|
    blog.posts += sample_posts
    blog.save!
  end
end

然后用这样的东西创建它：

Factory.create(:blog, :sample_posts => [post1, post2])

任何想法如何做到这一点？

Answer 1

由于瞬态属性，这现在可以在没有任何“黑客”的情况下实现（参见问题 #49 的评论）

例子：

FactoryGirl.define do
  factory :user do
    transient do
      bar_extension false
    end
    name {"foo #{' bar' if bar_extension}"}
  end
end

# Factory(:user).name = "foo"
# Factory(:user, :bar_extension => true).name = "foo bar"

对于 < 5.0 的 Factory Girl 版本：

FactoryGirl.define do
  factory :user do
    ignore do
      bar_extension false
    end
    name {"foo #{' bar' if bar_extension}"}
  end
end

# Factory(:user).name = "foo"
# Factory(:user, :bar_extension => true).name = "foo bar"

Answer 2

显然，如果没有需要修改模型本身的变通方法，目前这是不可能的。此错误报告在：http: //github.com/thoughtbot/factory_girl/issues#issue/49

Answer 3

after_create一种选择是为钩子检查的额外帖子创建一个虚拟访问器：

class Blog
  has_many :posts
  attr_accessible :name, :title, ... # DB columns
  attr_accessor   :sample_posts      # virtual column
end

Factory.define :blog do |blog|
  blog.name 'Blah'

  blog.after_create do |b|
    b.posts += b.sample_posts
    b.save!
  end
end

Factory(:blog, :sample_posts => [post1, post2])

Answer 4

另一种选择是使用build而不是create添加:autosave到集合中：

class Blog
  has_many :posts, :autosave => true
end

Factory.define :blog do |blog|
  blog.name 'Blah'
  blog.posts { |_| [Factory.build(:post)] }
end

Factory(:blog, :posts => [post1, post2])
#or
Factory.build(:blog, :posts => [unsavedPost1, unsavedPost2])

Answer 5

如果您在 factorygirl 文件中打开课程，我建议您这样做

require "user"
class User
  attr :post_count
end

这样您就可以打开课程，而不是覆盖它