CODEWITHSUNDEEP
ruby-on-rails-3factory-bot
Rob Smith
Rob Smith

Reputation: 173

How to access the passed-in parameters hash in FactoryGirl

I am working on a web backend in Rails. My Article model is largely a wrapper that delegates most methods to the most recent ArticleVersion. When writing FactoryGirl factories, though, I was trying to create an :article_with_version factory that generates an Article and gives it a version, but I'm not sure how to forward parameters from the Article factory on to the ArticleVersion.

Here is the relevant code:

class Article < ActiveRecord::Base
  has_many :versions, :class_name => "ArticleVersion"

  def title
    self.versions.last.title
  end # method title

  def contents
    self.versions.last.contents
  end # method contents
end # model Article

FactoryGirl.define do
  factory :article_version do; end

  factory :article do; end

  factory :article_with_version, :parent => :article do
    after_create do |article|
      article.versions << Factory(:article_version, :article_id => article.id)
    end # after_create
  end # factory :article_with_version
end # FactoryGirl.define

What I would like to be able to do is call Factory(:article_with_version, :title => "The Grid", :contents => "<h1>Greetings, programs!</h1>") and have FactoryGirl pass those :title and :contents parameters on to the new ArticleVersion (or nil if those are omitted). Is there a way to access that hash of dynamic parameters that are passed on during Factory.create()?

Upvotes: 0

Views: 2151

Answers (1)

Shevaun
Shevaun

Reputation: 1228

You can do it using transient attributes like this:

factory :article_with_version, :parent => :article do
  ignore do
    title nil
    contents nil
  end

  after_create do |article, evaluator|
    article.versions = [FactoryGirl.create(:article_version, title: evaluator.title, contents: evaluator.contents)]
    article.save! 
  end
end

Just note that the attributes being ignored will not be set on the Article itself, although it looks like that is the behaviour you want in this case.

Upvotes: 2

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