How can I save a custom field of an attribute in Woocommerce?

Question

Old

I am trying to create a custom field in the product attributes in Woocommerce. This to be able to select if an attribute is highlighted or not. For example:

Answer 1

As I struggled with the same issue I have tried using the code from Jesus Magallon. However, it did not work.

I found out that the priority of wp_ajax_woocommerce_save_attributes needed to be set to 0, otherwise the callback is not run for some reason.

Forthermore, if we only use $post->ID for get_post_meta() the correct results state of the checkbox will only be visible on page reload. To make sure the selected state is also visible direclty after ajax saving/reloading, we need to use $post_id = isset( $_POST['post_id'] ) ? absint( $_POST['post_id'] ) : $post->ID; instead.

Here the final version that should work perfectly for everyone:

add_action( 'woocommerce_after_product_attribute_settings', 'wcb_add_product_attribute_is_highlighted', 10, 2);
add_action( 'wp_ajax_woocommerce_save_attributes', 'wcb_ajax_woocommerce_save_attributes', 0);

function get_attribute_highlighted( $attribute_name, $i ) {
    global $post;

    // ID for either from ajax or from post
    $post_id = isset( $_POST['post_id'] ) ? absint( $_POST['post_id'] ) : $post->ID ;
    $attribute_name = strtolower( sanitize_title( $attribute_name ) );
    $val = get_post_meta( $post_id, 'attribute_' . $attribute_name . '_highlighted_' . $i, true );

    return !empty( $val ) ? $val : false;
}

function wcb_add_product_attribute_is_highlighted( $attribute, $i=0 ) {
    $value = get_attribute_highlighted($attribute->get_name(), $i); ?>
        
            
                

                    
                        
                         name="attribute_highlighted[]" value="1" />
                    
                
                
            
        
     $val ) {
            $attr_name = sanitize_title( $data['attribute_names'][$i] );
            $attr_name = strtolower( $attr_name );
            update_post_meta( $post_id, 'attribute_' . $attr_name . '_highlighted_' . absint( $i ), wc_string_to_bool( $val ) );
        }
    }
}