vendor/rails/activerecord/test/fixtures/parrots_pirates.yml

   1 george_blackbeard:
   2   parrot_id: <%= Fixtures.identify(:george) %>
   3   pirate_id: <%= Fixtures.identify(:blackbeard) %>
   4
   5 louis_blackbeard:
   6   parrot_id: <%= Fixtures.identify(:louis) %>
   7   pirate_id: <%= Fixtures.identify(:blackbeard) %>