Fetch child products in grouped products woocommerce

Question

I want to fetch child product ids of a parent grouped product, how to do that, earlier woocommerce saves the child array in wp_option table as key to be _transient_wc_product_children_ids_8 but the recent update has changed the way it saves to the database, plz help me, how can I fetch child products from parent product in grouped products.

Answer 1

Use the get_children() method in the WC_Product_Grouped class.

$product_id = 8; // ID of parent product
$product    = get_product( $product_id );
$children   = $product->get_children();

It should return an array of product IDs.

UPDATED for WooCommerce 2.5+ Replaces get_product() with wc_get_product()

$product_id = 8; // ID of parent product
$product    = wc_get_product( $product_id );
$children   = $product->get_children();

Answer 2

On Woocommerce version 2.5.0 get_product is already deprecated.

Use wc_get_product instead

$product_id = 8;
$product = wc_get_product($product_id);
$product->get_children();