Question

在WooCommerce中，我实施了 @ jtsternberg WooCommerce: Allow adding multiple products to the cart via the add-to-cart query string，允许一次添加多个产品，但我收到了很多实际客户的投诉尝试使用包含多个产品的链接之一。

对于初学者，如果客户点击结帐然后点击浏览器＆＃34;返回＆＃34;按钮，所有项目数量增量。我通过在添加到购物车行为完成后将用户重定向到剥去了任何其他参数的购物车网址解决了这个问题，但这并不理想。

我真正想要的是检查物品是否首先在购物车中，如果物品已经存在则只添加到购物车。有没有人做过类似的事情？

工作更新： 我最终修改了@jtsternberg中的代码以使用完全独立的param名称，以避免与默认的add-to-cart行为发生冲突。然后，我可以使用@ LoicTheAztec的建议代码，将行为包装在一个检查中，看看是否存在新的参数。以下是完整部分：

function custom_product_link() {
  if (empty( $_REQUEST['multi-product-add'])) {
    return;
  }

  $product_ids = explode( ',', $_REQUEST['multi-product-add'] );

  foreach ( $product_ids as $product_id ) {
    $product_id        = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $product_id ) );
    $was_added_to_cart = false;
    $adding_to_cart    = wc_get_product( $product_id );

    if ( ! $adding_to_cart ) {
      continue;
    }

    $add_to_cart_handler = apply_filters( 'woocommerce_add_to_cart_handler', $adding_to_cart->product_type, $adding_to_cart );

    if ( 'simple' !== $add_to_cart_handler ) {
      continue;
    }

    // For now, quantity applies to all products.. This could be changed easily enough, but I didn't need this feature.
    $quantity          = empty( $_REQUEST['quantity'] ) ? 1 : wc_stock_amount( $_REQUEST['quantity'] );
    $passed_validation = apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity );

    if ( $passed_validation && false !== WC()->cart->add_to_cart( $product_id, $quantity ) ) {
      wc_add_to_cart_message( array( $product_id => $quantity ), true );
    }
  }
  if ( wc_notice_count( 'error' ) === 0 ) {
    // If has custom URL redirect there
    if ( $url = apply_filters( 'woocommerce_add_to_cart_redirect', false ) ) {
      wp_safe_redirect( $url );
      exit;
    } elseif ( get_option( 'woocommerce_cart_redirect_after_add' ) === 'yes' ) {
      wp_safe_redirect( wc_get_cart_url() );
      exit;
    }
  }
}

function check_product_added_to_cart( $passed, $product_id, $quantity) {
  if (!empty( $_REQUEST['multi-product-add'])) {
    foreach (WC()->cart->get_cart() as $cart_key => $cart_item ){
      // if products are already in cart:
      if( $cart_item['product_id'] == $product_id ) {
        // Set the verification variable to "not passed" (false)
        $passed = false;
        // (Optionally) Displays a notice if product(s) are already in cart
        // wc_add_notice( '<strong>' . $btn['label'] . '</strong> ' . __( 'This product is already in your cart.', 'woocommerce' ), 'error' );
        // Stop the function returning "false", so the products will not be added again
        return $passed;
      }
    }
  }
  return $passed;
}
add_action( 'wp_loaded', 'custom_product_link', 15 );
add_action( 'woocommerce_add_to_cart_validation', 'check_product_added_to_cart', 10, 3 );

Answer 1

在您使用的代码中，您有 woocommerce_add_to_cart_validation 过滤器挂钩，您可以在自定义挂钩功能中使用它来检查购物车中是否有罕见的产品，例如：

add_action( 'woocommerce_add_to_cart_validation', 'check_product_added_to_cart', 10, 3 );
function check_product_added_to_cart( $passed, $product_id, $quantity) {
    foreach (WC()->cart->get_cart() as $cart_key => $cart_item ){
        // if products are already in cart:
        if( $cart_item['data']->get_id() == $product_id ) {
            // Set the verification variable to "not passed" (false)
            $passed = false;
            // (Optionally) Displays a notice if product(s) are already in cart
            wc_add_notice( '<strong>' . $btn['label'] . '</strong> ' . __( 'This product is already in your cart.', 'woocommerce' ), 'error' );
            // Stop the function returning "false", so the products will not be added again
            return $passed;
        }
    }
    return $passed;
}

代码放在活动子主题（或主题）的function.php文件中，或者放在任何插件文件中。

代码经过测试，这通常适用于您的自定义......

对于产品数量，您可以在某些条件下使用 $quantity 参数 $cart_item['quantity'] ...

如果多个产品尚未装入购物车，请将其添加到购物车

1 个答案: