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

george_blackbeard:
  parrot_id: <%= Fixtures.identify(:george) %>
  pirate_id: <%= Fixtures.identify(:blackbeard) %>

louis_blackbeard:
  parrot_id: <%= Fixtures.identify(:louis) %>
  pirate_id: <%= Fixtures.identify(:blackbeard) %>