Change product category once the order status get completed

问题

I want to apply new category to product once the order status get "completed" in WooCommerce. Let's say that the Product is in (category A) and I want to apply (category B) on order status "completed".

Is there any way to do this?

I found couple of tutorials but don't know how to combine them:

https://wordpress.org/support/topic/automatically-add-posts-to-a-category-conditionally

https://wordpress.org/support/topic/woocommerce-on-order-complete-insert-quantity-data-into-custom-database-table

How can I achieve this?

Thanks!

回答1:

Updated (Compatibility with WooCommerce 3+)

As you want to change the woocommerce category for a product, you should use wp_set_object_terms() native WordPress function that accept either the category ID or slug with 'product_cat' taxonomy parameter and NOT 'category'.

The woocommerce_order_status_completed hook is classically used to fire a callback function when order change to status completed.

This is the code:

add_action('woocommerce_order_status_completed', 'add_category_to_order_items_on_competed_status' 10, 1);

function add_category_to_order_items_on_competed_status( $order_id ) {

    // set your category ID or slug
    $your_category = 'my-category-slug'; // or $your_category = 123; 

    $order = wc_get_order( $order_id );

    foreach ( $order->get_items() as $item_id => $product_item ) {
        // compatibility with WC +3
        if ( version_compare( WC_VERSION, '3.0', '<' ) ) 
            $product_id = $product_item['product_id'];
        else
            $product_id = $product_item->get_product_id();

        wp_set_object_terms( $product_id, $your_category, 'product_cat' );
    }
}

Or you can use also woocommerce_order_status_changed hook with a conditional function that will filter order "completed" status:

add_action('woocommerce_order_status_changed', 'add_category_to_order_items_on_competed_status' 10, 1);

function add_category_to_order_items_on_competed_status( $order_id ) {

    // set your category ID or slug
    $your_category = 'my-category-slug'; // or $your_category = 123; 

    $order = wc_get_order( $order_id );
    $order_status =  $order->post->post_status;

    if ( $order->has_status( 'completed' ) ) {
        foreach ( $order->get_items() as $item_id => $product_item ) {
            // compatibility with WC +3
            if ( version_compare( WC_VERSION, '3.0', '<' ) ) 
                $product_id = $product_item['product_id'];
            else
                $product_id = $product_item->get_product_id();

            wp_set_object_terms( $product_id, $your_category, 'product_cat' );
        }
    }
}

This code goes on function.php file of your active child theme or theme.

This code is tested and fully functional.

回答2:

If you want to do any thing after order complete then you have to use woocommerce_order_status_completed action, and to add category you have to use wp_set_object_terms. So in your case this function should work.

function add_cat_product($order_id) {
    $post_categories = array(); //Array of category IDs.
    $append = FALSE; // If true, categories will be appended to the post. If false, categories will replace existing categories.
    $order = new WC_Order( $order_id );
    $items = $order->get_items();
    foreach ( $items as $item ) {
        //$product_name = $item['name'];
        $product_id = $item['product_id'];
        $term_taxonomy_ids = wp_set_object_terms( $product_id, $post_categories, 'product_cat', $append);
        if ( is_wp_error( $term_taxonomy_ids ) ) {
            // There was an error somewhere and the terms couldn't be set.
        } else {
            // Success! The post's categories were set.
        }
    }
}
add_action( 'woocommerce_order_status_completed', 'add_cat_product' );

来源：https://stackoverflow.com/questions/39199628/change-product-category-once-the-order-status-get-completed