マジェントでイベントがあり、
sales_quote_collect_totals_after
これは、合計が計算されるたびに発生します。ボタンをクリックして割引を適用するセッションでフラグを設定し、上記のイベントのオブザーバー メソッドで、設定されているかどうかを確認してから割引を適用します。
config.xml で
<global>
<events>
<sales_quote_collect_totals_after>
<observers>
<class>Custom_Module_Model_Observer</class>
<method>collectTotals</method>
</observers>
</sales_quote_collect_totals_after>
</events>
</global>
で Observer.php を作成します
Custom
/Module
/Model
/Observer.php
Observer.php で関数を作成する
public function collectTotals(Varien_Event_Observer $observer)
{
$quote=$observer->getEvent()->getQuote();
$quoteid=$quote->getId();
//check condition here if need to apply Discount
if($disocuntApply) $discountAmount =5;
if($quoteid) {
if($discountAmount>0) {
$total=$quote->getBaseSubtotal();
$quote->setSubtotal(0);
$quote->setBaseSubtotal(0);
$quote->setSubtotalWithDiscount(0);
$quote->setBaseSubtotalWithDiscount(0);
$quote->setGrandTotal(0);
$quote->setBaseGrandTotal(0);
$canAddItems = $quote->isVirtual()? ('billing') : ('shipping');
foreach ($quote->getAllAddresses() as $address) {
$address->setSubtotal(0);
$address->setBaseSubtotal(0);
$address->setGrandTotal(0);
$address->setBaseGrandTotal(0);
$address->collectTotals();
$quote->setSubtotal((float) $quote->getSubtotal() + $address->getSubtotal());
$quote->setBaseSubtotal((float) $quote->getBaseSubtotal() + $address->getBaseSubtotal());
$quote->setSubtotalWithDiscount(
(float) $quote->getSubtotalWithDiscount() + $address->getSubtotalWithDiscount()
);
$quote->setBaseSubtotalWithDiscount(
(float) $quote->getBaseSubtotalWithDiscount() + $address->getBaseSubtotalWithDiscount()
);
$quote->setGrandTotal((float) $quote->getGrandTotal() + $address->getGrandTotal());
$quote->setBaseGrandTotal((float) $quote->getBaseGrandTotal() + $address->getBaseGrandTotal());
$quote ->save();
$quote->setGrandTotal($quote->getBaseSubtotal()-$discountAmount)
->setBaseGrandTotal($quote->getBaseSubtotal()-$discountAmount)
->setSubtotalWithDiscount($quote->getBaseSubtotal()-$discountAmount)
->setBaseSubtotalWithDiscount($quote->getBaseSubtotal()-$discountAmount)
->save();
if($address->getAddressType()==$canAddItems) {
$address->setSubtotalWithDiscount((float) $address->getSubtotalWithDiscount()-$discountAmount);
$address->setGrandTotal((float) $address->getGrandTotal()-$discountAmount);
$address->setBaseSubtotalWithDiscount((float) $address->getBaseSubtotalWithDiscount()-$discountAmount);
$address->setBaseGrandTotal((float) $address->getBaseGrandTotal()-$discountAmount);
if($address->getDiscountDescription()){
$address->setDiscountAmount(-($address->getDiscountAmount()-$discountAmount));
$address->setDiscountDescription($address->getDiscountDescription().', Amount Waived');
$address->setBaseDiscountAmount(-($address->getBaseDiscountAmount()-$discountAmount));
}else {
$address->setDiscountAmount(-($discountAmount));
$address->setDiscountDescription('Amount Waived');
$address->setBaseDiscountAmount(-($discountAmount));
}
$address->save();
}//end: if
} //end: foreach
//echo $quote->getGrandTotal();
foreach($quote->getAllItems() as $item){
//We apply discount amount based on the ratio between the GrandTotal and the RowTotal
$rat=$item->getPriceInclTax()/$total;
$ratdisc=$discountAmount*$rat;
$item->setDiscountAmount(($item->getDiscountAmount()+$ratdisc) * $item->getQty());
$item->setBaseDiscountAmount(($item->getBaseDiscountAmount()+$ratdisc) * $item->getQty())->save();
}
}
}
}
collectTotals
見積合計が更新されるたびに関数が呼び出されるため、明示的に呼び出す必要はありません。
ここでどのように機能するかを確認してください。
Magento セッション変数の設定については、こちらを確認してください。
それが役に立てば幸い!