In Magento Default coupon code will apply to special price if special price is there else it will apply to original price ,
but in some case we need to apply coupon code discount to original price and then apply to special price
EX:- Special price 1000
Original Price :- 2000
Coupon discount is 10%
Then in cart page it will show special price- discountamount( acc to special price) i't 1000-100 = 900
but we need special price- discountamount( acc to Original price) i'e 1000- 200 =800
for that we need to create a event
add this xml code in config.xml in side events tag i'e <events></events>
<!-- event for default coupon but discount will apply for MRP-->
<salesrule_validator_process>
<observers>
<new_dicount_coupon>
<type>singleton</type>
<class>Namespcae_Modulename_Model_Observer</class>
<method>newcoupondiscountcal</method>
</new_dicount_coupon>
</observers>
</salesrule_validator_process>
And created Observer.php inside your module/model if not exists else add only this function newcoupondiscountcal($observer) in side Observer class
class Namespcae_Modulename_Model_Observer
{
//event for default coupon but discount will apply for MRP
public function newcoupondiscountcal($observer)
{
$item=$observer['item'];
$rule=$observer['rule'];
$rulePercent = max(0, 100-$rule->getDiscountAmount());
//print_r($rule->getData()); exit;
if($rule->getSimpleAction()=='by_percent') {
$disPer=$rule->getDiscountAmount();
$product=Mage::getModel('catalog/product')->load($item->getProductId());
$ratdisc=($product->getPrice()*$disPer)/100;
$DiscountAmount=$ratdisc+$item->getDiscountAmount();
$BaseDiscountAmount=$ratdisc+$item->setBaseDiscountAmount();
$result = $observer['result'];
$result->setDiscountAmount($DiscountAmount);
$result->setBaseDiscountAmount($BaseDiscountAmount);
}
}
clear cache and apply the code
