Monkey patching Devise (or any Rails gem)

Question

I\'m using the Devise authentication gem in my Rails project, and I want to change the keys it\'s using in flash alerts. (Devise uses :notice and :alert flash keys, but I wa

Answer 1

You need to overwrite DeviseController while keeping around its superclass, in your initializer.

Something like:

class DeviseController < Devise.parent_controller.constantize
    def set_flash_message(key, kind, options = {})
       if key == 'alert'
           key = 'error'
       elsif key == 'notice'
           key = 'success'
       end
       message = find_message(kind, options)
       flash[key] = message if message.present?
    end
end