Rails计数器缓存在生产上不起作用

我在Rails 3.1.4（ruby 1.8.7）中遇到了一个奇怪的问题，那就是计数器缓存机制。当我在开发服务器上运行我的应用程序时，一切都很好。切换到生产环境后，每次添加一条评论时，comments_count列会增加+2。Rails计数器缓存在生产上不起作用

我已经通过日志看起来和增量查询那里显示了两次：

Started POST "/comments" for 127.0.0.1 at Mon May 21 16:39:49 +0200 2012 
    Processing by CommentsController#create as HTML 
    Parameters: {"comment"=>{"content_id"=>"2803", "content_type"=>"Post", "value"=>"hello there"}, "authenticity_token"=>"/2HRoMq/I+fPzLlKB8CezWEpwjywHo5RwCgm2VRj0zo=", "utf8"=>"✓", "commit"=>"Dodaj"} 
    [1m[36mUser Load (0.4ms)[0m [1mSELECT `users`.* FROM `users` WHERE `users`.`id` = 1 LIMIT 1[0m 
    1 row, 646 bajty 
    app/controllers/application_controller.rb:27:in `current_user_session' 
    app/controllers/application_controller.rb:32:in `current_user' 
    app/controllers/application_controller.rb:41:in `require_user' 
    [1m[35m (0.2ms)[0m BEGIN 
    [1m[36m (1.0ms)[0m [1mUPDATE `users` SET `last_request_at` = '2012-05-21 14:39:50', `updated_at` = '2012-05-21 14:39:50', `perishable_token` = 'U6r38z0lX1G7Y48xC9s4' WHERE `users`.`id` = 1[0m 
    [1m[35m (46.0ms)[0m COMMIT 
    [1m[36m (0.2ms)[0m [1mBEGIN[0m 
    [1m[35mBlacklist Load (0.7ms)[0m SELECT `blacklists`.* FROM `blacklists` WHERE (user_id = 1 AND end_date > '2012-05-21 14:39:50') 
    0 rows, 0 bajty 
    app/models/comment.rb:97:in `block_check' 
    app/controllers/comments_controller.rb:25:in `create' 
    [1m[36mSQL (0.6ms)[0m [1mINSERT INTO `comments` (`comments_count`, `content_id`, `content_type`, `created_at`, `edits`, `points`, `reported`, `updated_at`, `user_id`, `value`) VALUES (0, 2803, 'Post', '2012-05-21 14:39:50', 0, 0, NULL, '2012-05-21 14:39:50', 1, 'hello there')[0m 
    [1m[35mPost Load (0.6ms)[0m SELECT `posts`.* FROM `posts` WHERE `posts`.`id` = 2803 LIMIT 1 
    1 row, 658 bajty 
    app/controllers/comments_controller.rb:25:in `create' 
    [1m[36mSQL (0.6ms)[0m [1mUPDATE `posts` SET `comments_count` = COALESCE(`comments_count`, 0) + 1 WHERE `posts`.`id` = 2803[0m 
    [1m[35mSQL (0.4ms)[0m UPDATE `posts` SET `comments_count` = COALESCE(`comments_count`, 0) + 1 WHERE `posts`.`id` = 2803 
    [1m[36m (39.2ms)[0m [1mCOMMIT[0m 
    Redirected to http://0.0.0.0:3000/news/zobacz/Tibia-obt-startuje-w-listopadzie-2

我想这一天来解决，我不知道什么是错的。在开发模式下，一切正常。从Rails2升级后出现问题。

来源

2012-05-21 Arti

对此有帮助吗？ http://stackoverflow.com/questions/9476054/activerecord-has-many-through-duplicating-counter-caches-on-mass-assignment –

恐怕它不会:( – Arti

问题已解决。正如我所说的，我从Rails2迁移和我以下已过时的语句曾在我的模型：

belongs_to :content, :polymorphic => true, :counter_cache => true

Rails3中自动处理counter_cache领域，上述声明是多余的。我改变了我的模型关系：

belongs_to :content, :polymorphic => true

工作就像一个魅力。

来源

2012-05-22 15:33:59 Arti

Rails计数器缓存在生产上不起作用

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