In our daily coding routine you have to work with product and category. So today we learn how to get Magento 2 product categories from product object.You can always get the assigned categories of a product using following code.
In Constructor:
protected $_productFactory;
public function __construct(
\Magento\Catalog\Model\ProductFactory $productFactory
) {
$this->_productFactory = $productFactory;
}
public function getProductCategories()
{
$product = $this->_productFactory->create()->load($pid); // $pid = Product_ID
return $product->getCategoryIds();
}
public function __construct(
\Magento\Catalog\Model\ProductFactory $productFactory
) {
$this->_productFactory = $productFactory;
}
public function getProductCategories()
{
$product = $this->_productFactory->create()->load($pid); // $pid = Product_ID
return $product->getCategoryIds();
}
Now we get all categories from product collection.
protected $_productCollectionFactory;
protected $_productloader;
public function __construct(
\Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productFactory,
\Magento\Catalog\Model\ProductFactory $productloader
) {
$this->_productCollectionFactory = $productFactory;
$this->_productloader = $productloader;
}
public function getProductCollectionCategories()
{
$prodIds= $this->_productCollectionFactory->create(); // $pid = Product_ID
foreach($prodIds as $pid){
$product = $this->_productloader->create()->load($pid);
$proCats = $product->getCategoryIds();
$catIds= array_merge($catIds, $pproCats);
}
$finalCat = array_unique($catIds);
return $finalCat;
}
protected $_productloader;
public function __construct(
\Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productFactory,
\Magento\Catalog\Model\ProductFactory $productloader
) {
$this->_productCollectionFactory = $productFactory;
$this->_productloader = $productloader;
}
public function getProductCollectionCategories()
{
$prodIds= $this->_productCollectionFactory->create(); // $pid = Product_ID
foreach($prodIds as $pid){
$product = $this->_productloader->create()->load($pid);
$proCats = $product->getCategoryIds();
$catIds= array_merge($catIds, $pproCats);
}
$finalCat = array_unique($catIds);
return $finalCat;
}