Can´t get custom attribute on WooCommerce product - wordpress

Question

I try to save custom meta data after creating an order in WooCommerce. I try it with the woocommerce_new_order_item hook and in general it works. But I need to store a custom attribute from the ordered product..but I can´t get it.
What I tried:
add_action('woocommerce_new_order_item','add_basic_meta_for_new_quote',10,3); // add extra order metas
function add_basic_meta_for_new_quote($item_id, $values, $cart_item_key)
{
$angebotstext = get_post_meta($item_id, 'angebotstext', false);
wc_add_order_item_meta($item_id, 'angebotstext', $angebotstext);
}
or
add_action('woocommerce_new_order_item','add_basic_meta_for_new_quote',10,3); // add extra order metas
function add_basic_meta_for_new_quote($item_id, $values, $cart_item_key)
{
global $product;
$angebotstext = $product->get_attribute( 'pa_angebotstext' );
wc_add_order_item_meta($item_id, 'angebotstext', $angebotstext);
}
The attribute is saved here:
... and the result for meta_value is always empty, NULL or a:0:{}
Do you have any idea?
-----EDIT----
It worked with this way:
add_action('woocommerce_new_order_item','add_basic_meta_for_new_quote',10,3); // add extra order metas
function add_basic_meta_for_new_quote($item_id, $item, $order_id )
{
if ($order_id) {
$order = wc_get_order( $order_id );
}
# Iterating through each order items (WC_Order_Item_Product objects in WC 3+)
if ($order) {
foreach ( $order->get_items() as $item_id => $item_values ) {
// Product_id
$product_id = $item_values->get_product_id();
$product = wc_get_product($product_id);
$angebotstext = $product->get_attribute('Angebotstext');
if ( !empty($angebotstext) && $angebotstext != NULL ) {
wc_add_order_item_meta($item_id, 'Angebotstext' , $angebotstext);
}
}
}
}
BUT: This code adds my custom attribute two times as meta.... why that? 🤔

Answer 1

The main issue here is if the order contains multiple products, so you're going to face the issue of multiple updates for the same order.
To avoid that or to choose to deal with it the right way, here are some ideas:
To make this works for multiple products:
Changed this part:
wc_add_order_item_meta($item_id, 'Angebotstext _'.$product_id , $angebotstext);
This will add a new custom meta for each product by adding the product ID at the end of each meta_key and the meta_value will be the product unique value for that attribute.
so you're going to find this custom fields on the order page:
Angebotstext_123 = product attribute.
Angebotstext_485 = product
attribute. Angebotstext_951 = product attribute.
the '123', '485' are the product id and the meta value for that meta_key will be that product attribute.
To prevent it from updating multiple times:
if ($order) {
$angebotstext ='';
foreach ( $order->get_items() as $item_id => $item_values ) {
// Product_id
$product_id = $item_values->get_product_id();
$product = wc_get_product($product_id);
$angebotstext = $product->get_attribute('Angebotstext');
$prev_angebotstext = $angebotstext;
if ( !empty($angebotstext) && $angebotstext != NULL && $angebotstext != $prev_angebotstext ) {
wc_add_order_item_meta($item_id, 'Angebotstext' , $angebotstext);
}
}
}
"$prev_angebotstext" is the previous item attribute.
if ( !empty($angebotstext) && $angebotstext != NULL && $angebotstext != $prev_angebotstext )
This condition will check if the current product attribute is equal to the previous product attribute, if yes it will not update the order again.
Thank you!