app.rb

class Kalifornium < Padrino::Application
  register Loader
end

check.rb

module Loader
  def registered(app)
    app.send(:include, Coder)
  end
  module Coder
    def self.load_accessories
     # variable
      @sides = Side.all
      @status = Status.all
      @typologies = Typology.all
      @toilette = Toilette.all
       @beds = AdditionalBed.all
       @children = Child.all
    end
  end
end

file in /lib

gistfile4.txt

view:
NoMethodError at /rooms/new
undefined method `each' for nil:NilClass
- @sides.each do |side|

rooms.rb

Kalifornium.controllers :rooms do

get :new do
      Coder.load_accessories
      @room = Room.new
      @title = "ADMIN: Inserisci una nuova stanza"
      render "rooms/new"
    end

end

# app.rb
MyApp < Padrino::Application
  def foo
    @a = 1
  end
end

# controllers/test.rb
MyApp.controllers :base do
  get :index, :map => "/" do
    foo
    @a.inspect
  end
end