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This question follows How to show a product custom field (custom SKU) in WooCommerce orders answer to my previous question.

How do I make a product custom field articleid (custom SKU) to be visible only in Admin Order edit pages for each order item?

Also, it does not work for manual orders. How to display a product custom field articleid (custom SKU) on manual orders too?

LoicTheAztec
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Wanderlust Consulting
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1 Answers1

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Updated last function to avoid errors with other order item types that "line items".

To make it only visible on admin, In your last function, you will need to change the order item meta key from 'articleid' to '_articleid' (adding an underscore at the beginning of the key) like:

// Save as custom order item meta data and display on admin single orders
add_action( 'woocommerce_checkout_create_order_line_item', 'add_articleid_as_orders_item_meta', 10, 4 );
function add_articleid_as_orders_item_meta( $item, $cart_item_key, $values, $order ) {
    $articleid = $values['data']->get_meta('articleid'); // Get product "articleid"

    // For product variations when the "articleid" is not defined
    if ( ! $articleid && $values['variation_id'] > 0 ) {
        $product   = wc_get_product( $values['product_id'] ); // Get the parent variable product
        $articleid = $product->get_meta( 'articleid' );  // Get parent product "articleid"
    }

    if ( $articleid ) {
        $item->add_meta_data( '_articleid', $articleid ); // add it as custom order item meta data
    }
}

For manual orders you will use the following:

add_action( 'woocommerce_before_save_order_item', 'action_before_save_order_item_callback' );
function action_before_save_order_item_callback( $item ) {
    // Targeting only order item type "line_item"
    if ( $item->get_type() !== 'line_item' )
        return; // exit

    $articleid = $item->get_meta('articleid');

    if ( ! $articleid ) {
        $product = $item->get_product(); // Get the WC_Product Object
        
        // Get custom meta data from the product
        $articleid = $product->get_meta('articleid');
        
        // For product variations when the "articleid" is not defined
        if ( ! $articleid && $item->get_variation_id() > 0 ) {
            $product   = wc_get_product( $item->get_product_id() ); // Get the parent variable product
            $articleid = $product->get_meta( 'articleid' );  // Get parent product "articleid"
        }

        // Save it as custom order item (if defined for the product)        
        if ( $articleid ) {
            $item->update_meta_data( '_articleid', $articleid );
        }
    }
}

Code goes in functions.php file of the active child theme (or active theme). Tested and works.

Related to this thread:

LoicTheAztec
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  • Thank you so much! This is very useful to know. Is there a way to change the label in the admin order page? I noticed that it now displays as "_articleid". – Wanderlust Consulting Jan 25 '21 at 02:08
  • @WanderlustConsulting Yes it is possible, ask a new question and notify me… I will answer it. – LoicTheAztec Jan 25 '21 at 22:22
  • Just posted the question. Thanks a lot for your help. https://stackoverflow.com/questions/65893733/how-to-edit-label-of-custom-product-meta-data-in-line-item-section-of-woocommerc – Wanderlust Consulting Jan 25 '21 at 23:17