test.rb

 [0] pry(main)> ActiveRecord::Base.connection.execute('SELECT "wikis".* FROM "wikis" INNER JOIN "collaborators" ON "wikis"."id" = "collaborators"."wiki_id" WHERE "collaborators"."user_id" = 1;')
 
  (0.2ms)  SELECT "wikis".* FROM "wikis" INNER JOIN "collaborators" ON "wikis"."id" = "collaborators"."wiki_id" WHERE "collaborators"."user_id" = 1;
=> [{"id"=>65,
  "title"=>"some wiki title",
  "body"=>"some body here",
  "private"=>"f",
  "user_id"=>9,
  "created_at"=>"2015-09-18 20:37:55.194186",
  "updated_at"=>"2015-09-18 20:37:55.194186",
  "permalink"=>"some-wiki-title",
  0=>65,
  1=>"some wiki title",
  2=>"some body here",
  3=>"f",
  4=>9,
  5=>"2015-09-18 20:37:55.194186",
  6=>"2015-09-18 20:37:55.194186",
  7=>"some-wiki-title"}]