Loading subcategories for a category in Magento 2

April 20, 2016 - Fire development, Magento 2

Magento 2 Development

If you don;t know how to load subcategories for a particular category in Magento 2, you’ve come to the right place. Below, we will explain this procedure.

Dmitry Fedyuk on Mage2.PRO recommends to utilize the \Magento\Catalog\Model\Category::getChildrenCategories() method.

/**
* 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);
}

/**

* 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);

}

This is how your code should look like on practice:

   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
*