On Fri, Jun 25, 2010 at 8:25 AM, onion wushu <li...@ruby-forum.com> wrote: > Hi :) > > In my application, I would like to know if a class is a subclass of > ApplicationController, I mean, if a class is a controller. > > I thought about this kind of code: > > klass = classname > while klass && klass != ApplicationController > klass = klass.superclass > end > > It's working well but I'm wondering if there is a way to use the ruby > fonction kind_of? to do it well. > Actually, when I want to check if (for example) UsersController is a > controller, I write: UsersController.kind_of?(ApplicationController), > but it doesn't work at all. Do you have any ideas why ? Or do you know a > better solution to handle it ?
object.kind_of?(class) tests if object is an instance of class or one of it's superclasses, UserController is an instance of it's metaclass so it isn't an instance of ApplicationConrtroller or one of it's subclasses. Use the Module#< method UsersController < ApplicationController which returns true if the argument is one of the receivers ancestors, there is also Module#<= which also returns true if the receiver is equal to the argument as well. -- Rick DeNatale Blog: http://talklikeaduck.denhaven2.com/ Github: http://github.com/rubyredrick Twitter: @RickDeNatale WWR: http://www.workingwithrails.com/person/9021-rick-denatale LinkedIn: http://www.linkedin.com/in/rickdenatale -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-t...@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
