問(wèn)題描述

我有一個(gè)產(chǎn)品注冊(cè)擴(kuò)展，它在注冊(cè)保存后調(diào)度一個(gè)事件.如果虛擬產(chǎn)品與注冊(cè)產(chǎn)品相關(guān)，另一個(gè)擴(kuò)展程序使用該事件為虛擬產(chǎn)品生成優(yōu)惠券.

I have an extension for product registration that dispatches an event after the registration is saved. Another extension uses that event to generate a coupon for a virtual product if it is related to the registered product.

我需要取回有關(guān)生成的優(yōu)惠券的數(shù)據(jù)，以便通過(guò)電子郵件將其連同產(chǎn)品注冊(cè)的詳細(xì)信息一起發(fā)送給用戶.

I need to get back data on the generated coupon to send to the user in an email along with the details of their product registration.

有沒(méi)有辦法將數(shù)據(jù)從觀察者返回到事件被調(diào)度的地方?

Is there a way to return data from the observer back to where the event is dispatched?

推薦答案

Magento 中有一個(gè)技巧可用于您的目的.由于您可以將事件數(shù)據(jù)(如產(chǎn)品或類(lèi)別模型)傳遞給觀察者，因此還可以創(chuàng)建一個(gè)容器，從中獲取這些數(shù)據(jù).

There is a trick available in Magento for your purpose. Since you can pass event data to the observers, like product or category model, it also possible to create a container from which you can get this data.

例如，可以在調(diào)度程序中執(zhí)行此類(lèi)操作:

For instance such actions can be performed in dispatcher:

$couponContainer = new Varien_Object();
Mage::dispatchEvent('event_name', array('coupon_container' => $couponContainer));
if ($couponContainer->getCode()) { 
    // If some data was set by observer...
}

觀察者方法如下所示:

public function observerName(Varien_Event_Observer $observer) 
{
    $couponContainer = $observer->getEvent()->getCouponContainer();
    $couponContainer->setCode('some_coupon_code');
}

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