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How do I get the Categories and the subcategories recursively using Magento 2? I was able to display all categories but the problem is I need to display it in a treelike manner such as below

  • Default category
    • Home
    • About Us
    • Products
      • P-one
        • SC-Four
      • P-two
        • SC-One
        • SC-Two
      • Site Map
      • SC-One

But what I'm getting is the displaying of all of this category. Is there a way to achieve the above sample? Right now my code looks like this

class Index extends \Magento\Framework\View\Element\Template 
{

protected $_categoryCollectionFactory;
protected $_categoryHelper;
protected $_categoryRepository;
protected $_storeManager;

public function __construct(
    \Magento\Backend\Block\Template\Context $context,
    \Magento\Catalog\Model\ResourceModel\Category\CollectionFactory $categoryCollectionFactory,
    array $data = []
)
{
    $this->_categoryCollectionFactory = $categoryCollectionFactory;
    $this->_categoryHelper = $categoryHelper;
    $this->_categoryCategoryRepository = $categoryRepository; 
    $this->_storeManager = $storeManager;
    $this->layerResolver = $layerResolver;
    parent::__construct($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;
}

and in my phtml file I have this

$categories = $this->getCategoryCollection();
foreach ($categories as $category) {
    echo $category->getName() . '<br />';
}

I'm not sure how to do about this and it would be great if I can also get a reference of any Magento 2 documentation where it teaches how to get different part of the site like the products and other stuff. Right now I have zero knowledge with Magento and I don't know any documentation/tutorial I can follow.

Would appreciate your help on this.

MadzQuestioning
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1 Answers1

1

Magento\Theme\Block\Html\Topmenu Block already give you all categories and sub categories recursively check the phtml file /vendor/magento/module-theme/view/frontend/templates/html/topmenu.phtml you can get menu with below code

<?php $columnsLimit = $block->getColumnsLimit() ?: 0; ?>
<?php echo $_menu = $block->getHtml('level-top', 'submenu', $columnsLimit) ?>

The above code will give you categories in html tree structure. you can also rewrite the block Magento\Theme\Block\Html\Topmenu to get output in your required format.

OR

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$categoryFactory = $objectManager->create('Magento\Catalog\Helper\Category');
$all = $categoryFactory->getStoreCategories(false,true,true);
Dexture
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