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

greetings:
  id: 1
  post_id: 1
  body: Thank you for the welcome
  type: Comment

more_greetings:
  id: 2
  post_id: 1
  body: Thank you again for the welcome
  type: Comment
  
does_it_hurt:
  id: 3
  post_id: 2
  body: Don't think too hard
  type: SpecialComment