adicionar peso, largura, altura e comprimento no retorno da api do pedido do WooCommerce

functions.php

<?php 

function wc_add_rest_order_meta( $response, $post, $request ) {
	
	foreach( $response->data['line_items'] as $item_id => $line_item ) {
			if ( ! empty( $line_item['product_id'] ) ) {
				$product_id = ! empty( $line_item['variation_id'] ) ? $line_item['variation_id'] : $line_item['product_id'];
				$response->data['line_items'][ $item_id ]['weight'] =  get_post_meta( $product_id, '_weight', true );
				$response->data['line_items'][ $item_id ]['length'] =  get_post_meta( $product_id, '_length', true );
				$response->data['line_items'][ $item_id ]['width'] =  get_post_meta( $product_id, '_width', true );
				$response->data['line_items'][ $item_id ]['height'] =  get_post_meta( $product_id, '_height', true );
			}
	}
	
	return $response;	
}

add_filter( 'woocommerce_rest_prepare_shop_order_object', 'wc_add_rest_order_meta', 9999, 3 );