first:
  id: 1
  name: John
  email: john@example.com
  body: Body of the comment
  post_id: 1

second:
  id: 2
  name: Me
  email: me@example.com
  body: Body of the comment
  post_id: 1

without_post_id:
  id: 3
  name: John
  email: john@example.com
  body: Body of the comment
  post_id: 

with_post_id:
  id: 4
  name: Me
  email: me@example.com
  body: Body of the comment
  post_id: 1