Dependenciesのログ

Posted on July 25th, 2009 by masayuki | Filed in tips

クラスやモジュールが定義されるタイミングを知りたくてコードを追っていたところ、Rails2.3.2のCHANGELOGに以下のような記述があることに気がつきました。

* Add debugging logging to Dependencies. Currently can be enabled with Dependencies.log_activity = true; adding to Initializer and documenting is forthcoming. [Nicholas Seckar]

RAILS_ROOT/config/environment.rbで以下のように設定すると、 
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ActiveSupport::Dependencies.logger = Logger.new(STDOUT)
ActiveSupport::Dependencies.log_activity = true
以下のように、ロードまわりがロギングされます。 
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Processing HogesController#index (for ::ffff:192.168.181.1 at 2009-07-25 20:24:45) [GET]
  Hoge Load (1.5ms)   SELECT * FROM "hoges" 
Rendering template within layouts/hoges
Rendering hoges/index
Completed in 22ms (View: 11, DB: 2) | 200 OK [http://192.168.181.3/hoges]
Dependencies: called new_constants_in(Object)
Dependencies: New constants: 
Dependencies: called new_constants_in(Object)
Dependencies: New constants: 
Dependencies: called load_missing_constant(Object, "HogesController")
Dependencies: called require_or_load("/home/masayuki/work/rails/generator/test1/app/controllers/hoges_controller.rb", nil)
...(省略)...
Dependencies: called clear()
Dependencies: removing constant ApplicationHelper
Dependencies: removing constant HogesHelper
Dependencies: removing constant ApplicationController
Dependencies: removing constant HogesController
Dependencies: removing constant Hoge


Processing HogesController#new (for ::ffff:192.168.181.1 at 2009-07-25 20:24:47) [GET]
Rendering template within layouts/hoges
Rendering hoges/new
Completed in 20ms (View: 8, DB: 0) | 200 OK [http://192.168.181.3/hoges/new]

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