https://b.hatena.ne.jp/entry/api.rubyonrails.org/classes/ActionController/PolymorphicRoutes.html Polymorphic URL helpers are methods for smart resolution to a named route call when given an Active Record model instance. They are to be used in combination with ActionController::Resources. These... https://b.hatena.ne.jp/harigel/20100615#bookmark-22345015 2010-06-15T11:44:53Z *programming *rails polymorphic