Magento-在非对象上调用成员函数getId（）

odd_duck 发表于 Dev

奇怪的鸭子

我有以下代码，显示当前类别中的5种产品（类别为cat：63）：

$_helper    = $this->helper('catalog/output');
$_category  = $this->getCurrentCategory();   
$collection = $_category->getProductCollection();
Mage::getModel('catalog/layer')->prepareProductCollection($collection);
$numProducts = 5;
$collection->setPage(1, $numProducts)->load();

这工作正常，但我想进一步调整，因此它只显示在另一个类别（产品目录ID：71）中也找到的产品，$collection->addCategoryFilter(71);但是当我这样做时，我得到了错误：

Fatal error: Call to a member function getId() on a non-object in

完整的代码是：

$_helper    = $this->helper('catalog/output');
$_category  = $this->getCurrentCategory();   
$collection = $_category->getProductCollection();
Mage::getModel('catalog/layer')->prepareProductCollection($collection);

// this line throws the error
$collection->addCategoryFilter(71);

$numProducts = 5;
$collection->setPage(1, $numProducts)->load();


foreach($collection as $_product){
    // output products...
};

数

这行是不正确的

$collection->addCategoryFilter(71);

我猜您正在尝试过滤ID = 71的类别。对吗？如果是这样，您可以按照以下方式进行操作：

$catToFilter = Mage::getModel('catalog/category')->load(71);
$collection->addCategoryFilter($catToFilter);

出现问题的原因是，当类别过滤器方法需要一个对象时，您正在提供ID。因此，您将获得ID为71的类别对象，并将其作为参数传递。

================================================== ===============================

更新：仅显示两个类别中共有的产品。

// 1st category
$cat1 = Mage::getModel ('catalog/category')->load(63);

//2nd category
$cat2 = Mage::getModel ('catalog/category')->load(71);

//loading cat2 products
$collection = $cat2->getProductCollection();

//this keeps the common products and remaining products of cat1
$collection->addCategoryFilter($cat1);

$removeList = array();
foreach ($collection as $prod)
{
  $prodCatIds = $prod->getCategoryIds();
  //if the current collection products does not lie in cat2
  if (! in_array($cat2->getId(), $prodCatIds))
  {
    //creating a list of product ids that are not common 
    array_push($removeList , $prod->getId());
  }

}

//removing the UNCOMMON products from the collection
foreach($removeList as $rl)
  $collection->addAttributeToFilter('entity_id', array('neq' => $rl)) ;

//The collection is now ready
foreach($collection->getData() as $_product){
  //$_product details or load product object
  zend_debug::dump($_product['sku']);
}