ローカルの怖話でActiveRecord::RecordNotFound (Couldn't find Comic with id=1)

gistfile1.txt

macmini:kowabana tyamuro$ rails s
=> Booting Thin
=> Rails 3.2.8 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
>> Thin web server (v1.5.0 codename Knife)
>> Maximum connections set to 1024
>> Listening on 0.0.0.0:3000, CTRL+C to stop
[2012-11-22T17:31:02 (67438)]  INFO : ** [Dumper] agent started as primary, max_filesize = 4294967296


Started GET "/" for 192.168.1.3 at 2012-11-22 17:31:08 +0900
Processing by HomeController#index as HTML
   (0.3ms)  SELECT COUNT(*) FROM `stories` WHERE `stories`.`publish` = 1
  Rendered shared/_award_banner.html.haml (2.6ms)
  Rendered shared/_iphone_banner.html.haml (2.5ms)
  Rendered shared/_commic_banner.html.haml (2.4ms)
  Story Load (0.9ms)  SELECT `stories`.* FROM `stories` WHERE `stories`.`publish` = 1 AND (id IN (7,9,5,3,2))
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered stories/_story.html.haml (164.2ms)
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered stories/_story.html.haml (6.1ms)
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered stories/_story.html.haml (55.8ms)
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered stories/_story.html.haml (3.4ms)
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered stories/_story.html.haml (3.5ms)
  Rendered search/_form.html.haml (3.2ms)
  WeeklyScore Load (0.3ms)  SELECT `scores`.* FROM `scores` WHERE `scores`.`type` IN ('WeeklyScore') ORDER BY scores.kowabana_point desc, scores.story_id desc LIMIT 10
  Story Load (0.7ms)  SELECT `stories`.* FROM `stories` WHERE `stories`.`publish` = 1 AND `stories`.`id` = 1 LIMIT 1
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1
  Rendered rankings/_ranking.html.haml (14.3ms)
  Comment Load (0.5ms)  SELECT `comments`.* FROM `comments` WHERE (commentable_id not in (select id from stories where publish = 0)) ORDER BY comments.id desc LIMIT 5
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` IN (1)
  Comic Load (0.4ms)  SELECT `comics`.* FROM `comics` WHERE `comics`.`id` IN (1)
  Comic Load (0.3ms)  SELECT `comics`.* FROM `comics` WHERE `comics`.`id` = 1 LIMIT 1
  Rendered comments/_object.html.haml (6.5ms)
  Rendered home/index.html.haml within layouts/application (598.8ms)
Completed 500 Internal Server Error in 776ms

ActiveRecord::RecordNotFound (Couldn't find Comic with id=1):
  app/models/comment.rb:18:in `commentable_without_scope'
  app/helpers/application_helper.rb:139:in `commentable_path'
  app/views/comments/_object.html.haml:1:in `_app_views_comments__object_html_haml__510329113424959719_70277569103000'
  app/views/home/index.html.haml:84:in `block in _app_views_home_index_html_haml___1116319859053479557_70277610788860'
  config/initializers/application_helper_ext.rb:31:in `li_for'
  app/views/home/index.html.haml:83:in `_app_views_home_index_html_haml___1116319859053479557_70277610788860'


  Rendered /Users/tyamuro/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/_trace.erb (2.2ms)
  Rendered /Users/tyamuro/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.3ms)
  Rendered /Users/tyamuro/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.8/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (32.9ms)