static function getDiscount($slmaster, $prod_group)
{
$cc = new ConstraintChain();
$cc->add(new Constraint('slmaster_id', '=', $slmaster));
$cc->add(new Constraint('prod_group_id', '=', $prod_group));
$sldiscount = new SLDiscount();
$sldiscount->loadBy($cc);
if ($sldiscount->isLoaded()) {
return $sldiscount->discount_percentage;
} else {
return 0;
}
}
