FactoryGirl attribute_for does not create associations for obvious performance reason. However, sometime it is useful to get all attributes with ids of association to test a POST#create request for example. To enable, just create a macro in your spec/support folder with the following content. Then call attributes_with_foreign_keys instead of att…

controller.rb

module ControllerMacros
  def attributes_with_foreign_keys(*args)
    FactoryGirl.build(*args).attributes.delete_if do |k, v|
      ["id", "type", "created_at", "updated_at"].member?(k)
    end
  end
end

RSpec.configure do |config|
  config.include ControllerMacros, :type => :controller
end