只允许WooCommerce中同一供应商的购物车中的产品

Question

我在WoocCommerce商店的子主题的functions.php文件中编写了一个函数。

add to cart按钮上的验证会检查购物车中的所有产品是否仅来自一个供应商。

• 如果产品来自一个供应商，它将添加该产品
• 如果产品来自不同的供应商，则应在通知中显示警告

此功能无法正常工作，因为只有当我手动刷新页面时才会显示通知。它应该立即显示通知。有人能帮我吗？

下面是我的代码：

add_action( 'wp_enqueue_scripts', 'martfury_child_enqueue_scripts', 20 );
function martfury_child_enqueue_scripts() {
wp_enqueue_style( 'martfury-child-style', get_stylesheet_uri() );
if ( is_rtl() ) {
wp_enqueue_style( 'martfury-rtl', get_template_directory_uri() . '/rtl.css', array(), '20180105' );
}
}
add_action( 'woocommerce_add_to_cart_validation', function( $is_allow, $product_id, $quantity ) {
$product = get_post( $product_id );
$product_author = $product->post_author;
//Iterating through each cart item
foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
$cart_product_id = $cart_item['product_id'];
$cart_product = get_post( $cart_product_id );
$cart_product_author = $cart_product->post_author;
if( $cart_product_author != $product_author ) {
$is_allow = false;
break;
}
}
if( !$is_allow ){
// We display an error message
wc_add_notice( __( "Well, you already have some item in your cart. First checkout with those and then purchase other items!", "wcfm-ecogear" ), 'error' );

return wp_redirect($woocommerce->cart->get_cart_url());
}
return $is_allow;

}, 50, 3 );

Answer 1

您应用的一些步骤似乎是不必要的，这应该足以满足

• get_post((-检索给定post ID或post对象的post数据
• 通过代码中添加的注释标签进行解释

function filter_woocommerce_add_to_cart_validation( $passed, $product_id, $quantity, $variation_id = null, $variations = null ) {       
// Cart NOT empty
if ( ! WC()->cart->is_empty() ) {
// Retrieves post data given a post ID or post object.
$product = get_post( $product_id );

// Post author
$product_author = $product->post_author;

// Flag, by default false
$flag = false;
// Loop trough cart
foreach( WC()->cart->get_cart() as $cart_item ) {
// Get product ID
$cart_product_id = $cart_item['data']->get_id();
// Get post
$cart_product = get_post( $cart_product_id );

// Post author
$cart_product_author = $cart_product->post_author;

// Condition NOT equal
if( $cart_product_author != $product_author ) {
$flag = true;
// Break loop
break;
}
}

// True
if ( $flag ) {
// Add notice    
wc_add_notice( __( 'Products in the cart have to come from only 1 vendor', 'woocommerce' ), 'error' );
// NOT passed
$passed = false;
}
}

return $passed;
}
add_filter( 'woocommerce_add_to_cart_validation', 'filter_woocommerce_add_to_cart_validation', 10, 5 );