I use following code to add attributes to a product:
foreach ($_attributes as $name => $value) {
wp_set_object_terms($post_id, $value, $name, true);
$product_attributes[$name] = array (
'name' => $name, // set attribute name
'value' => $value, // set attribute value
'is_visible' => 0,
'is_variation' => 1,
'is_taxonomy' => 1
);
}
update_post_meta($post_id, '_product_attributes', $product_attributes );
but it remove previous attributes I added in product edit in admin, like product brand or model. How can I update current product attributes without remove previous ones?
Thanks to help me.