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railsチュートリアル第4章 コントロールクラス

Posted at

####コントロールクラス
クラスや継承を勉強してきた。

lass StaticPagesController < ApplicationController

  def home
  end

  def help
  end

  def about
  end
end

#####クラス階層を調べよう。

>> controller.class
=> StaticPagesController
>> controller.class.superclass
=> ApplicationController
>> controller.class.superclass.superclass
=> ActionController::Base
>> controller.class.superclass.superclass.superclass
=> ActionController::Metal
>> controller.class.superclass.superclass.superclass.superclass
=> AbstractController::Base
>> controller.class.superclass.superclass.superclass.superclass.superclass
=> Object

Object

AbstractController::Base

ActionController::Metal

ActionController::Base

ApplicationController

StaticPagesController
という風になっている。

>> controller.home
=> nil

。Railsのアクションには戻り値がありません

####演習
toy_appを消していたから解けなかった。

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