订单编辑页面中的 WooCommerce 自定义字段

Question

// Display custom field Orders edit page
add_action('woocommerce_before_order_itemmeta', 'storage_location_of_order_items', 10, 3);
function storage_location_of_order_items($item_id, $item, $product)
{
    // Only on backend order edit pages
    if (!(is_admin() && $item->is_type('line_item'))) return;

// Get your '_laoriiul' value (replace the slug by yours below)
    $custom_ladu = get_post_meta($product->get_id(), '_laoriiul', true); //Error message: "Uncaught Error: Call to a member function get_id() on bool in functions.php:211"  - when product not aviable (line 211)
     if (isset($custom_ladu)) { // only show the custom SKU if it's set
        echo "<br>" . wp_kses_post("Laoriiul: $custom_ladu"); // change this line if needed
    }
    }

problem/error 发生在商店中不再有产品时 - 当不再获得 ID 时。如何控制在获取id之前是否存在产品id？尝试过不同的解决方案对我没有任何帮助。有人帮我吗？

Answer 1

我无法重现错误，但从错误开始，我想您可以使用以下内容。

method_exists ( mixed $object , string $method_name ) : bool

Checks if the class method exists in the given object.

您碰巧使用旧版本的 WooCommerce 或 Wordpress 吗？

// Display custom field Orders edit page
function storage_location_of_order_items( $item_id, $item, $product ) { 
    // Only on backend order edit pages
    if (!(is_admin() && $item->is_type('line_item'))) return;

    // Checks if the class method exists
    if ( method_exists( $product, 'get_id' ) ) {
        // Get product id
        $product_id = $product->get_id();

        // Get your '_laoriiul' value (replace the slug by yours below)
        $custom_ladu = get_post_meta( $product_id, '_laoriiul', true);

        if ( isset( $custom_ladu ) ) { // only show the custom SKU if it's set
            echo "<br>" . wp_kses_post( $custom_ladu ); // change this line if needed
        }
    }
}
add_action('woocommerce_before_order_itemmeta', 'storage_location_of_order_items', 10, 3);

订单编辑页面中的 WooCommerce 自定义字段

WooCommerce custom field in Orders edit page

php

wordpress

product

woocommerce

hook-woocommerce