root:
  id: 1
  created_at: 2004-05-01 12:00:00
  updated_at: 2004-05-01 12:00:00
  forum_id: 1
  subject: Root
  last_post_created_at: 2004-05-01 12:00:00
  last_post_user_id: 1
  last_post_author: user1
  post_counter: 11
  deleted: 0

another:
  id: 2
  created_at: 2004-05-01 12:00:00
  updated_at: 2004-05-01 12:00:00
  forum_id: 1
  subject: Another
  last_post_created_at: 2004-05-02 12:00:00
  last_post_user_id: 2
  last_post_author: user2
  post_counter: 3
  deleted: 0

thread3:
  id: 3
  created_at: 2004-05-01 12:00:00
  updated_at: 2004-05-01 12:00:00
  forum_id: 2
  subject: Another
  last_post_created_at: 2004-05-03 12:00:00
  last_post_user_id: 4
  last_post_author: user4
  post_counter: 2
  deleted: 0