How to use CanCan with Grape?

Question

I wanna use CanCan for authorization in my API. How can I use, for example, the authorize! method from Grape::API module? For now, when I'm trying to use it, it returns me this: undefined method 'authorize!' for #<Grape::Endpoint:0xca39664>

Answer 1

Ok, authorize! is a addition for ActionController::Base, see this source

you can define own Grape helper:

class API < Grape::API
  helpers do
   def authorize!(*args)
     # you already implement current_user helper :)
     ::Ability.new(current_user).authorize!(*args)
   end
  end
end

or use module helper: helpers CanCan::ControllerAdditions (btw, I don't think is a good idea)