How to Get Child Product Ids from a Configurable product - magento2

Question

I am trying to fetch all child product Ids from configurable product Ids.
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$product = $objectManager->create('\Magento\Catalog\Model\Product');
$storeManager = $this->_objectManager->get('Magento\Store\Model\StoreManagerInterface');
$currentStore = $storeManager->getStore();
$mediaUrl = $currentStore->getBaseUrl(\Magento\Framework\UrlInterface::URL_TYPE_MEDIA);
$productURL = $mediaUrl.'catalog/product';
$collection = $this->_productCollectionFactory->create();
$productCollection = $collection->addAttributeToSelect('*')->addAttributeToFilter('type_id','configurable');
$vendor_product = array();
$productData = $product->getData();
foreach($productCollection as $prodObj){
$productData = array();
$product = $product->load($prodObj->getId());
$productTypeInstance = $product->getTypeInstance();
$usedProducts = $productTypeInstance->getUsedProducts($product);
foreach ($usedProducts as $child) {
$productData['childrenIds'][] = $child->getId();
}
I get Ids of my first configurable product in all the cases

Answer 1

<?php
namespace Vendor\Module\Block;
class ParentAndChilds extends \Magento\Framework\View\Element\Template
{
/**
* #var Context
*/
protected $context;
/**
* #var ProductRepositoryInterface
*/
protected $productRepository;
/**
* #var SearchCriteriaBuilder
*/
protected $searchCriteriaBuilder;
/**
* #var LinkManagementInterface
*/
protected $linkManagement;
public function __construct(
\Magento\Framework\View\Element\Template\Context $context,
\Magento\ConfigurableProduct\Api\LinkManagementInterface $linkManagement,
\Magento\Catalog\Api\ProductRepositoryInterface $productRepository,
\Magento\Framework\Api\SearchCriteriaBuilder $searchCriteriaBuilder,
array $data = []
)
{
$this->linkManagement = $linkManagement;
$this->productRepository = $productRepository;
$this->searchCriteriaBuilder = $searchCriteriaBuilder;
parent::__construct($context, $data);
}
public function getParentsAndChilds()
{
$searchCriteria = $this->searchCriteriaBuilder
->addFilter('type_id', 'configurable')
->create();
$configurableProducts = $this->productRepository
->getList($searchCriteria);
$parentAndChildProducts = array();
foreach ($configurableProducts->getItems() as $configurableProduct) {
$childProducts = $this->linkManagement
->getChildren($configurableProduct->getSku());
foreach ($childProducts as $childProduct) {
$parentAndChildProducts[$configurableProduct->getId()][] = $childProduct->getId();
}
}
return $parentAndChildProducts;
}
}

Answer 2

To get child product Ids from a configurable product, you can use below code:
public function __construct(
\Magento\Catalog\Api\ProductRepositoryInterface $productRepository
) {
$this->productRepository = $productRepository;
}
public function execute()
{
$_productId=57786;
$_product=$this->productRepository->getById($_productId);
$childIs=$_product->getExtensionAttributes()->getConfigurableProductLinks();
print_r($childIs);
}
Output looks like:
Array
(
[31981] => 31981
[31982] => 31982
[31983] => 31983
)
Hope it will help you.

Answer 3

$_children = $_product->getTypeInstance()->getUsedProducts($_product);
foreach ($_children as $child){
$childProducts[] = $child;
}
$_product is the configurable product object

Answer 4

You can use the below code for getting Child ID.
$product = $block->getProduct();
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$configurable_product_id = $product->getId();
$configurableProduct = $objectManager->get('Magento\Catalog\Model\ProductRepository')->getById($configurable_product_id);
$children = $configurableProduct->getTypeInstance()->getUsedProducts($configurableProduct); $childIds = array();
foreach ($children as $child){
$childIds[] = $child->getId();
}
sort($childIds);
print_r($childIds);
This is for sample code but I suggest do not use $objectManager directly, you can use Block on Plugin Method to get Product Object.

Answer 5

To get all simple children including out of stock products use:
$children = $product
->getTypeInstance()
->getChildrenIds($product->getId());
print_r($children);