Souke/common/models/Document.php

<?php

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namespace common\models ;

class Document extends ActiveRecordCommon
{
        public function getAmount($type = Order::AMOUNT_TOTAL, $format = false) 
        {
                $amount = 0 ;
                $ordersArray = $this->orders ;
                
                foreach($ordersArray as $order) {
                        $order->init() ;
                        $amount += $order->getAmount($type) ;
                }
                
                if ($format) {
                        return Price::format($amount) ;
                }     
                else {
                        return $amount;
                }
        }
}