How to load the subcategories for a category?

dmitrii_fediuk · December 24, 2015, 12:24pm

You can load subcategories for a category using the \Magento\Catalog\Model\Category::getChildrenCategories() method:

magento/magento2/blob/2.0.0/app/code/Magento/Catalog/Model/Category.php#L961-L969


/**
 * Return children categories of current category
 *
 * @return \Magento\Catalog\Model\ResourceModel\Category\Collection|\Magento\Catalog\Model\Category[]
 */
public function getChildrenCategories()
{
    return $this->getResource()->getChildrenCategories($this);
}

A usage example:

github.com

magento/magento2/blob/2.0.0/app/code/Magento/Catalog/Block/Navigation.php#L188


    return $this->_currentCategoryKey;
}


/**
 * Retrieve child categories of current category
 *
 * @return \Magento\Framework\Data\Tree\Node\Collection
 */
public function getCurrentChildCategories()
{
    $categories = $this->_catalogLayer->getCurrentCategory()->getChildrenCategories();
    /** @var \Magento\Catalog\Model\ResourceModel\Product\Collection $productCollection */
    $productCollection = $this->_productCollectionFactory->create();
    $this->_catalogLayer->prepareProductCollection($productCollection);
    $productCollection->addCountToCategories($categories);
    return $categories;
}


/**
 * Checkin activity of category
 *

See also: How to load a category by it’s id?