根据 WooCommerce 中应用的优惠券显示货到付款 (COD)

Show cash on delivery (COD) based on applied coupons in WooCommerce

我正在尝试仅为使用特定类型优惠券的客户启用货到付款 (COD)。

我有一个现有代码,当输入某种类型的优惠券时,将产品销售价格转换为正常产品价格。

现在我想补充一点,货到付款 (COD) 仅适用于同一功能内的有效优惠券。

我尝试添加的部分是:

if ($coupons = WC()->cart->get_applied_coupons()  == False )
    unset( $available_gateways['cod'] );

导致:

add_action( 'woocommerce_before_calculate_totals', 'add_custom_price', 10, 1);
function add_custom_price( $cart_object) {

    global $woocommerce;

    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    $coupon = False;

    if ($coupons = WC()->cart->get_applied_coupons()  == False )
        unset( $available_gateways['cod'] );

    if ($coupons = WC()->cart->get_applied_coupons()  == False ) 
      $coupon = False;
    else {
        foreach ( WC()->cart->get_applied_coupons() as $code ) {
          $coupons1 = new WC_Coupon( $code );
          if ($coupons1->type == 'percent_product' || $coupons1->type == 'percent')
            $coupon = True;
        }
    }

    if ($coupon == True)
        foreach ( $cart_object->get_cart() as $cart_item ) 
        {
            $price = $cart_item['data']->regular_price;
            $cart_item['data']->set_price( $price );
        }
}

这并没有给出真正的错误信息,但肯定也不是想要的结果。有什么建议吗?

首先,我重写了您现有的代码,即在应用某种类型的优惠券时将销售价格转换为正常价格的部分。这是因为您当前的代码包含过时的方法:

function action_woocommerce_before_calculate_totals( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 ) return;
    
    // Initialize
    $flag = false;
    
    // Applied coupons only
    if (  sizeof( $cart->get_applied_coupons() ) >= 1 ) {
        // Loop trough
        foreach ( $cart->get_applied_coupons() as $coupon_code ) {
            // Get an instance of the WC_Coupon Object
            $coupon = new WC_Coupon( $coupon_code );
            
            // Only for certain types, several can be added, separated by a comma
            if ( in_array( $coupon->get_discount_type(), array( 'percent', 'fixed_product', 'percent_product' ) ) ) {
                $flag = true;
                break;
            }
        }
    }
    
    // True
    if ( $flag ) {
        // Loop through cart items
        foreach ( $cart->get_cart() as $cart_item ) {
            // Get regular price
            $regular_price = $cart_item['data']->get_regular_price();
            
            // Set new price
            $cart_item['data']->set_price( $regular_price );
        }
    }
}
add_action( 'woocommerce_before_calculate_totals', 'action_woocommerce_before_calculate_totals', 10, 1 );

然后只激活 COD,如果应用了某种类型的优惠券,您可以使用 woocommerce_available_payment_gateways 挂钩

默认情况下 COD 将不可用:

// Payment gateways
function filter_woocommerce_available_payment_gateways( $payment_gateways ) {
    // Not on admin
    if ( is_admin() ) return $payment_gateways;
    
    // Initialize
    $flag = false;
    
    // WC Cart
    if ( WC()->cart ) {     
        // Get cart
        $cart = WC()->cart;
    
        // Applied coupons only
        if (  sizeof( $cart->get_applied_coupons() ) >= 1 ) {
            // Loop trough
            foreach ( $cart->get_applied_coupons() as $coupon_code ) {
                // Get an instance of the WC_Coupon Object
                $coupon = new WC_Coupon( $coupon_code );
                
                // Only for certain types, several can be added, separated by a comma
                if ( in_array( $coupon->get_discount_type(), array( 'percent', 'fixed_product', 'percent_product' ) ) ) {
                    $flag = true;
                    break;
                }
            }
        }
    }
    
    // NOT true, so false
    if ( ! $flag ) {
        // Cod
        if ( isset( $payment_gateways['cod'] ) ) {
            unset( $payment_gateways['cod'] );
        }  
    }
    
    return $payment_gateways;
}
add_filter( 'woocommerce_available_payment_gateways', 'filter_woocommerce_available_payment_gateways', 10, 1 );

两个代码都进入活动子主题(或活动主题)的 functions.php 文件。

已在 WordPress 5.8.1 和 WooCommerce 5.8.0 中测试