Checking for a current order

in.ex

  defp check_for_order(conn, _params) do
      case get_current_order do
          nil ->
              conn |> redirect(to: "/") |> halt
          order ->
              assign(conn, :order, order)
      end
  end

in.rb

  def check_for_order
    redirect_to root_path unless current_order.present?
  end