irbrc to auto switch rails console

.irbrc

# store_works Apartment Switching
if defined? Rails
  if defined? Apartment::Database
    def switch(store)
      Apartment::Database.switch(store)
      ENV['INTERNAL_SUBDOMAIN'] = store
      puts "=> Switching to #{store}"
    end

    class << self
      %w(store1 store2 test-store1 test-store2).each do |method_name|
        define_method(method_name) { switch(method_name) }
      end
    end

    store1
  end
end