從ActionController的調用alias_method，NoMethodError

Question

在Rails 3我想打電話給alias_method從我before_filter但我得到這個錯誤：NoMethodError in MyController#index

class ApplicationController < ActionController::Base 

    before_filter :my_test 

    protect_from_forgery 
    helper :all 

    def my_test 
     debugger 
     alias_method :new_method_name, :old_method_name 
    end 
end 

從調試器：

(rdb:3) p self.methods.grep /old_method_name/ 
["old_method_name"] 

Answer 1

這是答案。不管這個主意是不是好主意，我想聽聽你有什麼想說的...

class ApplicationController < ActionController::Base 

    before_filter :my_test 

    protect_from_forgery 
    helper :all 

    def my_test 
     self.class_eval("alias_method :new_method_name, :old_method_name") 
    end 
end