Magento產品收集排除類別

Question

我需要從我的productCollection中排除一個類別，但我不知道如何實現這一目標。

要求：

• 唯一可見的產品
• 排序：created_at DESC
• 排除類別編號43
• 限4（產品）

要找回我的收藏我使用以下代碼：

$collection = Mage::getResourceModel('catalog/product_collection') 
       ->setVisibility(Mage::getSingleton('catalog/product_visibility')->getVisibleInCatalogIds()); 



$collection = $this->_addProductAttributesAndPrices($collection) 
        ->addAttributeToSort('created_at', 'DESC') 
        ->setPageSize(4) 
        ->setCurPage(1); 

這工作得很好，但我不能添加此過濾器：

->addFieldToFilter('category_id', array('nin' => array('43'))) 

---

我發現這些類似的問題，但他們不會解決我的問題。

How to exclude a category from a magento getCollection

Magento - How do I exclude a category from product collection?

Answer 1

試試下面的代碼：

$collection = Mage::getResourceModel('catalog/product_collection');   
$collection->addAttributeToFilter('status', 1); // Enable products 
$collection->addAttributeToFilter('visibility', 4); // Visible products 
$collection->addAttributeToSort('created_at', 'DESC') // Order by created_at DESC 
      ->setPageSize(4) // Number of products 
      ->setCurPage(1); // set page size 
$catId = 43; // category id to exclude 
$collection->getSelect()->join(array('cats' => 'catalog_category_product'), 'cats.product_id = e.entity_id'); // Join with category on product/entiry id 
$collection->getSelect()->where('cats.category_id!=?',$catId); // exclude category from collection 

echo '<pre>'; 
echo $collection->getSelect(); // See sql query 
print_r($collection->getData()); Print collection in array format 

希望能幫助！

Answer 2

對拉吉夫的答案的Martijn擴大不包括GROUP BY，一個完整的工作的例子是：

$collection = Mage::getResourceModel('catalog/product_collection');   
$collection->addAttributeToFilter('status', 1); // Enable products 
$collection->addAttributeToFilter('visibility', 4); // Visible products 
$collection->addAttributeToSort('created_at', 'DESC') // Order by created_at DESC 
     ->setPageSize(4) // Number of products 
     ->setCurPage(1); // set page size 
$catId = 43; // category id to exclude 
$collection->getSelect()->join(array('cats' => 'catalog_category_product'), 'cats.product_id =   e.entity_id'); // Join with category on product/entiry id 
$collection->getSelect()->where('cats.category_id!=?',$catId); // exclude category from collection 
$collection->getSelect()->group(array('e.entity_id')) // Group by e.entity_id to prevent Item with the same id already exists.. Exception 

echo '<pre>'; 
echo $collection->getSelect(); // See sql query 
print_r($collection->getData()); Print collection in array format