Update Expense order with total zero based on profit centers

cat > UpdateExpenseOrderTotal.rb 
a = load "#{Rails.root}/UpdateExpenseOrderTotal.rb"    
a = UpdateExpenseOrderTotal          
a.new('tenant').run

class UpdateExpenseOrderTotal
  def initialize(tenant)
    @tenant = tenant
  end

  def run
    Apartment::Tenant.switch! @tenant
    update_finance_order_total
  end

  def get_profit_centers_by_order(order_id)
    Finance::ExpenseOrderProfitCenter.where(finance_expense_order_id: order_id)
  end

  def get_all_expense_orders_with_zero
    Finance::ExpenseOrder.where(total: 0)
  end

  def update_finance_order_total
    get_all_expense_orders_with_zero.each do |order|
      profits = get_profit_centers_by_order(order.id)
      total = profits.map(&:total).inject(0) { |sum, total| sum + (total.nil? ? 0 : total) }
      order.update(total: total)
    end
  end
end