[ruby] 特異メソッドã«åˆ¥åã‚’ã¤ã‘ã¦é€€é¿ã™ã‚‹ç‰¹ç•°ãƒ¡ã‚½ãƒƒãƒ‰ã‚’alias_methodを使用ã—ã¦åˆ¥åã‚’ã¤ã‘よã†ã¨ã™ã‚‹ã¨ã‚¨ãƒ©ãƒ¼ã«ãªã‚‹ã€‚ ã ãŒã€åŒã˜ãƒ–ãƒãƒƒã‚¯å†…ã§respond_to?(:find)を実行ã™ã‚‹ã¨trueãŒè¿”ã•ã‚Œã‚‹ã€‚ undefined method `find' for class `ActiveRecord::Base' (NameError) module EffectiveRails module ActiveRecord def self.included(klass) klass.send ClassMethods klass.class_eval do p respond_to?(:find) # => true alias_method_chain :find, :explain end end module ClassMethods def find_with_explain(*args) # hogehoge
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