STI and circular referencial association

gistfile1.rb

FactoryGirl.define do

  sequence :first_name  { |n| "John #{n}" }
  sequence :email { |n| "john#{n}@example.com" }


  factory :employee do
    first_name { generate(:first_name) }
    last_name 'Smith'
    email { generate(:email) }
    position { Settings.employee.positions.first }
    staff_number { "%06d" % (rand * 1000000) } # random 6 digit number
    supervisor nil


    factory :supervisor do
      first_name 'Manager'
      sequence(:email) { |n| "manager#{n}@example.com" }
    end


    # Option 2: which I have not used yet but this is from Inheritance section
    # ref: https://github.com/thoughtbot/factory_girl/blob/master/GETTING_STARTED.md
    # You can also assign the parent explicitly:
    #factory :post do
    #  title "A title"
    #end

    #factory :approved_post, parent: :post do
    #  approved true
    #end
    factory :employee_with_supervisor, parent: :supervisor do
      # not sure what should come here
    end
  end


  trait :with_supervisor do
    before :create do
      supervisor { FactoryGirl.create :supervisor }
    end
  end
end


# then use like so:
employee = create(:employee, :with_supervisor) # using the trait we created