class ProfilePresenter <ActionView :: Base | url_for不起作用。爲什麼？

Question

class ProfilePresenter < ActionView::Base 
def initialize 
    super 
    url_for # i got: You have a nil object when you didn't expect it! 
      #  The error occurred while evaluating nil.url_for 
end 
end 

url_for不起作用。爲什麼？

我作出這樣

ProfilePresenter.new 

Answer 1

一個新實例解決：我需要通過控制器實例時，我實例的ActionView :: Base的