public static function addReward($data)
{
$reward = new self();
$reward->setPromotionID($data['promotionID']);
$reward->setDiscountCalculation($data['discountCalculation']);
$reward->setDiscountAmount($data['discountAmount']);
$reward->setDiscountSubject($data['discountSubject']);
$reward->setDiscountTarget($data['discountTarget']);
$reward->save();
return $reward;
}
