SilverShop\ORM\OrderItemList::Sum
Sums up all of desired field for items, and multiply by quantity.
Optionally sum product field instead.
Signature
public function Sum(string
$field,
[boolean
$onproduct = false] )
Parameters
$field
— string- - field to sum
$onproduct
— boolean- - sum from product or not
Returns
- number
- - sum total of field