我正在運行一個功能，檢查用戶之前的訂單中是否有退款的商品，如果有，則在結帳時將積分作為負購物車費用應用。該功能適用于之前下過訂單的用戶，但對新用戶來說會在網站上造成嚴重錯誤。Fatal error: Uncaught Error: Call to a member function get_refunds() on bool in /wp-content/themes/my-theme/refunds.php:20 Stack trace: #0 /wp-includes/class-wp-hook.php(287): add_last_order_refund_total_at_checkout(Object(WC_Cart)) #1 /wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array) #2 /wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /wp-content/plugins/woocommerce/includes/class-wc-cart.php(1714): do_action('woocommerce_car...', Object(WC_Cart)) #4 /wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(270): WC_Cart->calculate_fees() #5 /wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php(829): WC_Cart_Totals->get_fees_from_cart() #6 /wp-content/plugins/woocommerce/includes/class-wc- in /wp-content/themes/my-theme/refunds.php on line 20以下是檢查上一個訂單是否有退款的代碼：//Check total of refunded items from last order - add as a fee at checkoutfunction add_last_order_refund_total_at_checkout($cart_object){ if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return; $user_id = get_current_user_id(); // The current user ID $customer = new WC_Customer( $user_id ); $last_order = $customer->get_last_order(); $order_id = $last_order; // Get the WC_Order Object instance (from the order ID) $order = wc_get_order( $order_id ); // Get the Order refunds (array of refunds) $order_refunds = $order->get_refunds(); $total_to_refund = $order->get_total_refunded()*(-1);//WIP need to check which items have tax if (!empty($order_refunds)) WC()->cart->add_fee( 'Refund', $total_to_refund ); }add_action( 'woocommerce_cart_calculate_fees', 'add_last_order_refund_total_at_checkout', 10, 1 ); 我相信我需要首先檢查用戶是否有任何以前的訂單，否則 get_refund() 會導致錯誤，因為他們沒有任何訂單要檢查？我該如何安全地做到這一點？
2 回答
烙印99
TA貢獻1829條經驗 獲得超13個贊
如果您查看WC_Customer?get_last_order()方法文檔?或源代碼，您將看到：
/*
?* @return WC_Order|false
?*/
這意味著該get_last_order() 方法可以返回：
物體WC_Order_
或false布爾值。
所以你可以在你的代碼中使用：
$last_order = $customer->get_last_order();
if ( ! $last_order )? {
? ?return; // Exit (Not an order)
}
為了避免這個錯誤。
現在，您可以使用is_a()php 條件函數來檢查變量是否來自特定的 Object 類，而不是其他變量，例如：
$last_order = $customer->get_last_order();
if ( ! is_a( $last_order, 'WC_Order' ) ) {
? ?return; // Exit (Not an order)
}
// Your other code…?
或者您可以使用?method_exists()php 條件函數作為WC_Order?get_refunds()方法，以檢查 a 變量是否來自特定的 Object 類而不是其他內容：
$last_order = $customer->get_last_order();
if ( ! method_exists( $last_order, 'get_refunds' ) )? {
? ?return; // Exit (Not an order)
}
// Your other code…
這三種情況工作得很好，避免了錯誤
汪汪一只貓
TA貢獻1898條經驗 獲得超8個贊
這樣試試吧，已經添加了多個控件，見評論
// Check total of refunded items from last order - add as a fee at checkout
function add_last_order_refund_total_at_checkout( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
// The current user ID
$user_id = get_current_user_id();
// User id exists
if ( $user_id > 0 ) {
$customer = new WC_Customer( $user_id );
// Get last order
$last_order = $customer->get_last_order();
// True
if ( $last_order ) {
// Get the order id
$order_id = $last_order->get_id();
// Order ID exists
if ( is_numeric( $order_id ) ) {
// Get the WC_Order Object instance (from the order ID)
$order = wc_get_order( $order_id );
// Get the Order refunds (array of refunds)
$order_refunds = $order->get_refunds();
// NOT empty
if ( ! empty( $order_refunds) ) {
// WIP need to check which items have tax
$total_to_refund = $order->get_total_refunded();
// Add fee
$cart->add_fee( 'Refund', $total_to_refund );
}
}
}
}
}
add_action( 'woocommerce_cart_calculate_fees', 'add_last_order_refund_total_at_checkout', 10, 1 );
- 2 回答
- 0 關注
- 143 瀏覽
添加回答
舉報
0/150
提交
取消