Wordpress Woocommerce add attribute / custom attribute to product - wordpress

Question

I have products from some API and want to insert these products. I was able to insert products and use already existing attributes ( or added by UI ).
Adding new term (My Color) to the existing attribute (Color) :
// Add term to the attribute
wp_set_object_terms( $post_id, "My Color", 'pa_color' , true );
Use the added attribute with current product :
// Data for the term to be used
$theData = array(
'pa_color'=>
array(
'name'=>'pa_color',
'value'='My Color',
'is_visible' => '1',
'is_variation' => '1',
'is_taxonomy' => '1'
)
);
// Add this attribute to this product
update_post_meta( $post_id,'_product_attributes',$theData);
How can I add new attribute and use it with the current product, for ex :
RAM : 4GB
I have tried this :
register_taxonomy(
'pa_ram',
'product',
array(
'label' => __( 'RAM' ),
'rewrite' => array( 'slug' => 'size' ),
'hierarchical' => true,
)
);
}
Here is the URL of the attributes I can see/add in UI :
wp-admin/edit.php?post_type=product&page=product_attributes

Answer 1

This did the job for me :
// Insert new attribute
function process_add_attribute($attribute) {
global $wpdb;
if (empty($attribute['attribute_type'])) {
$attribute['attribute_type'] = 'select';
}
if (empty($attribute['attribute_orderby'])) {
$attribute['attribute_orderby'] = 'name';
}
if (empty($attribute['attribute_public'])) {
$attribute['attribute_public'] = 1;
}
if (empty($attribute['attribute_name']) || empty($attribute['attribute_label'])) {
return new WP_Error('error', __('Please, provide an attribute name and slug.', 'woocommerce'));
}
elseif(($valid_attribute_name = valid_attribute_name($attribute['attribute_name'])) && is_wp_error($valid_attribute_name)) {
return $valid_attribute_name;
}
$wpdb->insert($wpdb->prefix.'woocommerce_attribute_taxonomies', $attribute);
do_action('woocommerce_attribute_added', $wpdb->insert_id, $attribute);
flush_rewrite_rules();
delete_transient('wc_attribute_taxonomies');
return true;
}
function valid_attribute_name( $attribute_name ) {
if ( strlen( $attribute_name ) >= 28 ) {
return new WP_Error( 'error', sprintf( __( 'Slug "%s" is too long (28 characters max). Shorten it, please.', 'woocommerce' ), sanitize_title( $attribute_name ) ) );
} elseif ( wc_check_if_attribute_name_is_reserved( $attribute_name ) ) {
return new WP_Error( 'error', sprintf( __( 'Slug "%s" is not allowed because it is a reserved term. Change it, please.', 'woocommerce' ), sanitize_title( $attribute_name ) ) );
}
return true;
}
Call it like :
// Add new attribute
$status = process_add_attribute(array(
'attribute_name' => 'myattribute',
'attribute_label' => 'My Attribute'
));
// Added successfully
if (!is_wp_error($status)) {
// Continue
}