How to access 'can?' method from within cell?

问题

I'm using cancan and cells gems in my ruby-on-rails project. How to access can? method from within cell? Thanks.

回答1:

I've had to do exactly this. Try

class MyCell < Cell::Rails

  include CanCan::ControllerAdditions

end                                        

If you're also using Devise, I had to do this:

class MyCell < Cell::Rails

  include CanCan::ControllerAdditions
  include Devise::Controllers::Helpers
  Devise::Controllers::Helpers.define_helpers(Devise::Mapping.new(:user, {}))

end                                        

#define_helpers will add helper methods such as current_user and user_signed_in? to the cell.

回答2:

For those who happen to have a custom current_ability() method (in which you can change the name of current_user method and Ability class names):

class OrderCell < Cell::Rails
  include CanCan::ControllerAdditions
  delegate :current_ability, :to => :controller
end

来源：https://stackoverflow.com/questions/5546892/how-to-access-can-method-from-within-cell