Magento -我如何从观察者模型中抓取数据

Question

我试图创建一个简单的产品选择器。表单中的post数据被传输到控制器到观察者。如果我var_dump在观察者，数据是存在的，但我不能访问它在我的块类。

这是我的控制器

public function indexAction() {
    $session  = Mage::getSingleton('core/session');
    if ($data = $this->getRequest()->getPost()) {
        $data['ta'] = $this->getRequest()->getPost('torqueAction');
        $data['tr'] = $this->getRequest()->getPost('torqueRequired');
        $data['tm'] = $this->getRequest()->getPost('torqueMetric');
        $eventdata = $data;
        Mage::dispatchEvent('selector_custom_event', $eventdata);
    }
    $this->_redirect('prodselector/index/result');
}
public function resultAction() {
    $this->loadLayout();
    $this->renderLayout();
}

这是我的观察者

public function observe($observer) {
$event = $observer->getEvent();
$test = $event->getData();
return $test;
}

这是我的block:

public function getSelectedProducts() {
$arr_products = array();
$products = Mage::getModel("prodselector/observer")->observe();
return $arr_products;
}

我是这样测试的:

<?php var_dump($this->getSelectedProducts()); ?>

每次执行模块

时，我都会得到一个错误

Fatal error: Call to a member function getEvent() on a non-object in app/code/local/Rts/Prodselector/Model/Observer.php on line 6

问题:

我不能访问数据从观察者通过块类到php，我不明白错误。

问题:

这个错误是什么意思?

我如何访问数据从观察者通过块类到php ?

我的流程是否正确?

你能给我一些指导吗?

谢谢!

Answer 1

尝试在块中获取产品，但没有数据

我给你推荐一个更好的解决方案:

控制器:

public function indexAction() {
    $session  = Mage::getSingleton('core/session');
    if ($data = $this->getRequest()->getPost()) {
        $ta = $this->getRequest()->getPost('torqueAction');
        $tr = $this->getRequest()->getPost('torqueRequired');
        $tm = $this->getRequest()->getPost('torqueMetric');
        $productCollection = Mage::getModel('catalog/product')->getCollection()
            ->addAttributeToSelect('name')
            ->addFieldToFilter('torque_action', $ta)
            ->addFieldToFilter('torque_required', $tr)
            ->addFieldToFilter('torque_metric', $tm);
        Mage::getSingleton('core/session')->setTorqueProductCollection($productCollection);
    }
    $this->_redirect('prodselector/index/result');
}
public function resultAction() {
    $this->loadLayout();
    $this->renderLayout();
}

在block中:

public function getSelectedProducts() {
    $products = Mage::getSingleton('core/session')->getTorqueProductCollection();
    return $products;
}

模板中:

<?php foreach ($this->getSelectedProducts() as $product) : ?>
    <?php print_r($product->getName());
<?php endforeach; ?>