根据产品库存数量更改 WooCommerce 处理订单状态

Question

我目前正在研究 WooCommerce 订单的自动状态更改：当产品库存达到 50% 时，我正在尝试将所有相关的 "processing" 订单更改为 'kundenupdate' 订单状态。

我正在使用函数 from ，查询状态为 "processing" 的订单，在下面的代码中形成一个产品 ID：

function retrieve_orders_ids_from_a_product_id( $product_id ) {
    global $wpdb;

    // Define HERE the orders status for queried orders
    $orders_statuses = "'processing'";

    # Requesting All defined statuses Orders IDs for a defined product ID
    return $wpdb->get_col( "
        SELECT DISTINCT woi.order_id
        FROM {$wpdb->prefix}woocommerce_order_itemmeta as woim, 
             {$wpdb->prefix}woocommerce_order_items as woi, 
             {$wpdb->prefix}posts as p
        WHERE  woi.order_item_id = woim.order_item_id
        AND woi.order_id = p.ID
        AND p.post_status IN ( $orders_statuses )
        AND woim.meta_key IN ( '_product_id', '_variation_id' )
        AND woim.meta_value LIKE '$product_id'
        ORDER BY woi.order_item_id DESC"
    );
}

/**
 * Automated order status changes
 */
add_action('woocommerce_order_status_changed', 'woocommerce_auto_processing_orders');
function woocommerce_auto_processing_orders( $order_id ) {
    if ( ! $order_id )
        return;

    $order = wc_get_order( $order_id );

    $items = $order->get_items();

    foreach ( $items as $item ) {
        //product_id gets tracked automatically
        $product = wc_get_product( $item['product_id'] );
        $product_id = $item->get_product_id();

        $orders_ids_array = retrieve_orders_ids_from_a_product_id( $product_id );

        $stock = $product->get_stock_quantity();

        //If order is "processing".
        foreach ( $orders_ids_array as $order_id_array ) { 
            if( $order_id_array->has_status( 'processing' ) ) {
                if( $stock == 350 ) {
                    $order_id_array->update_status( 'kundenupdate' );
                } elseif( $stock == 140 ) {
                    $order_id_array->update_status('on-hold');
                }
            }
        }
    }
}

如果我只更改一个订单的代码，就可以了。但是，如果我尝试获取特定 product_id 的所有订单，这些订单都处于 'processing' 状态，则无法正常工作。

我也不知道，函数retrieve_orders_ids_from_a_product_id()是否正常工作，因为我不知道如何在php中调试它。

如何获得特定 product_id 的所有订单的正确数组，这些订单都处于 'processing' 状态？

Answer 1

您的代码中存在一些错误和错误：

• 函数 retrieve_orders_ids_from_a_product_id() 工作正常并给出一个 订单 ID 数组 ，但不是一个 WC_Order 对象数组：例如，在你的代码，方法 has_status() 不能用于非 WC_Order 对象。
• 当前 WC_Order 对象已包含在 woocommerce_order_status_changed 挂钩中，因此您的函数中缺少参数。
• 钩子 woocommerce_order_status_changed 包含在 WC_Order status_transition() method source code, that is used by update_status() 中，因此您 不能将它与此钩子一起使用 ，因为它使一种无限循环。
• 还有一些其他的……

WooCommerce orders and reducing product stock quantity process explained:

The product stock status is reduced using wc_maybe_reduce_stock_levels() function which is hooked in those 4 hooks (see it on the function source code):
- woocommerce_payment_complete - has $order_id as argument,
- woocommerce_order_status_on-hold - has $order_id and $order as arguments,
- woocommerce_order_status_processing - has $order_id and $order as arguments,
- woocommerce_order_status_completed - has $order_id and $order as arguments.

When the related products stock quantities are reduced by an order, a specific meta data is set to this order, which meta key is _order_stock_reduced and meta value is 1, avoiding to reduce it multiple times.

在下面的代码中，我们将使用这 4 个钩子。

为了避免使用 WC_Order update_status() 方法和这些钩子 （如前所述） 时出现问题，我们将改用 wp_update_post() WordPress 函数.

您可以尝试以下方法：

function get_processing_orders_from_a_product_id( $product_id ) {
    global $wpdb;

    # Requesting processing Orders IDs for a defined product ID
    return $wpdb->get_col( "
        SELECT DISTINCT woi.order_id
        FROM {$wpdb->prefix}woocommerce_order_itemmeta as woim,
             {$wpdb->prefix}woocommerce_order_items as woi,
             {$wpdb->prefix}posts as p
        WHERE  woi.order_item_id = woim.order_item_id
        AND woi.order_id = p.ID
        AND p.post_status = 'wc-processing'
        AND woim.meta_key IN ( '_product_id', '_variation_id' )
        AND woim.meta_value LIKE '$product_id'
        ORDER BY woi.order_item_id DESC"
    );
}


add_action( 'woocommerce_payment_complete', 'orders_status_change_based_on_product_stock', 10, 2 );
add_action( 'woocommerce_order_status_on-hold', 'orders_status_change_based_on_product_stock', 10, 2 );
add_action( 'woocommerce_order_status_processing', 'orders_status_change_based_on_product_stock', 10, 2 );
add_action( 'woocommerce_order_status_completed', 'orders_status_change_based_on_product_stock', 10, 2 );
function orders_status_change_based_on_product_stock( $order_id, $order = '' ) {
    if( ! $order || ! is_a( $order, 'WC_Order') ) {
        $order = wc_get_order( $order_id ); // Get the WC_Order object if it's empty
    }

    // Loop Through order items
    foreach ( $order->get_items() as $item ) {
        $product   = $item->get_product(); // Get the WC_Product object
        $stock_gty = (int) $product->get_stock_quantity(); // the product stock quantity

        // Getting the new order status from stock quantity thresholds
        if ( $stock_gty === 140 ) {
            $new_status = 'on-hold';
        }
        elseif ( $stock_gty === 350 ) {
            $new_status = 'kundenupdate';
        }

        // Updating related processing orders status if any stock quantity threshold is reached
        if( isset($new_status) && $processing_orders = get_processing_orders_from_a_product_id( $item->get_product_id() ) ) {
            // Loop through all related processing orders (IDs)
            foreach ( $processing_orders as $processing_order_id ) {
                // We don't use update_status() WC_Order method to avoid an problems using those hooks
                wp_update_post( array( 'ID' => $processing_order_id, 'post_status' => $new_status ) );
            }
        }
    }
}

代码进入您的活动子主题（或活动主题）的 functions.php 文件。它应该更好用。

This might be a problem: What about if the stock of the product is reduced by 3 for example (order item quantity) and jumps over the 350 (or 140) stock quantity threshold? You might be obliged to think it different.