How to get parent product id in magento?

Question

I know that in Magento 1.4.2.0 one gets parent id\'s like so

list( $parentId ) = Mage::getModel(\'catalog/product_type_configurable\')
                                   


        

Answer 1

we can use in block file,magento 2,

 protected $_catalogProductTypeConfigurable;

 public function __construct(
            \Magento\Catalog\Block\Product\Context $context,       
            //for getting parent id of simple
            \Magento\ConfigurableProduct\Model\ResourceModel\Product\Type\Configurable $catalogProductTypeConfigurable,
            array $data = []
        ) {
               //for getting parent id of simple
            $this->_catalogProductTypeConfigurable = $catalogProductTypeConfigurable;
            parent::__construct($context, $data);
        }
    public function getProductData($id){ 
            $parentByChild = $this->_catalogProductTypeConfigurable->getParentIdsByChild($id);
            if(isset($parentByChild[0])){
                //set id as parent product id...
                $id = $parentByChild[0];          
            }
            return $id;     
        }