Magento 2在特定产品中获取类别

今天我将推荐在Magento 2中获取特定类别产品的方法。允许您根据需要从当前或任何产品中获取列表。

现在，你需要打开我的自定义模块（块级Mageplaza_HelloWorld），然后注入的对象\Magento\Catalog\Model\ResourceModel\Category\CollectionFactory，\Magento\Catalog\Model\ProductRepository并\Magento\Framework\Registry在该块类的构造函数的类。

app/code/Mageplaza/HelloWorld/Block/HelloWorld.php

<?php
namespace Mageplaza\HelloWorld\Block;
class HelloWorld extends \Magento\Framework\View\Element\Template
{    
    protected $_categoryCollectionFactory;
    protected $_productRepository;
    protected $_registry;
        
    public function __construct(
        \Magento\Backend\Block\Template\Context $context,        
        \Magento\Catalog\Model\ResourceModel\Category\CollectionFactory $categoryCollectionFactory,
        \Magento\Catalog\Model\ProductRepository $productRepository,
        \Magento\Framework\Registry $registry,
        array $data = []
        )
        {
            $this->_categoryCollectionFactory = $categoryCollectionFactory;
            $this->_productRepository = $productRepository;
            $this->_registry = $registry;
            parent::__construct($context, $data);
    }
    
    /**
     * Get category collection
     *
     * @param bool $isActive
     * @param bool|int $level
     * @param bool|string $sortBy
     * @param bool|int $pageSize
     * @return \Magento\Catalog\Model\ResourceModel\Category\Collection or array
     */
    public function getCategoryCollection($isActive = true, $level = false, $sortBy = false, $pageSize = false)
    {
        $collection = $this->_categoryCollectionFactory->create();
        $collection->addAttributeToSelect('*');        
        
        // select only active categories
        if ($isActive) {
            $collection->addIsActiveFilter();
        }
                
        // select categories of certain level
        if ($level) {
            $collection->addLevelFilter($level);
        }
        
        // sort categories by some value
        if ($sortBy) {
            $collection->addOrderField($sortBy);
        }
        
        // select certain number of categories
        if ($pageSize) {
            $collection->setPageSize($pageSize); 
        }    
        
        return $collection;
    }
    
    public function getProductById($id)
    {        
        return $this->_productRepository->getById($id);
    }
    
    public function getCurrentProduct()
    {        
        return $this->_registry->registry('current_product');
    }
}
?>

如果您想使用当前产品，则getCurrentProduct()功能处于活动状态。如果来自任何特定项目，请启用getProductById($id)功能。之后，您可以从链接到该产品的类别ID中检索该类别的集合。在该.phtml文件中，您需要添加以下代码段：

$productId = 1; // YOUR PRODUCT ID
$product = $block->getProductById($productId);
 
// for current product
// $product = $block->getCurrentProduct();
 
$categoryIds = $product->getCategoryIds();
 
$categories = $block->getCategoryCollection()
                    ->addAttributeToFilter('entity_id', $categoryIds);
                    
foreach ($categories as $category) {
    echo $category->getName() . '<br>';
}

这就是您将用于在Magento 2中检索特定产品类别的所有内容。感谢您的阅读，如果有任何问题，请在下面评论。