我试图限制 Woocommerce 商店的客户一次只能从 1 个“供应商”订购产品。我通过称为“供应商”的自定义分类来定义“供应商”。我正在尝试的代码只是出于某种原因限制了一切。function filter_woocommerce_add_to_cart_validation( $passed, $product_id, $quantity, $variation_id = null, $variations = null ) {// If passedif ( $passed ) { // If cart is NOT empty when a product is added if ( !WC()->cart->is_empty() ) { // Set vars $current_product_tag_ids = array(); $in_cart_product_tag_ids = array(); // Get current product categories via product_id $current_product_tag_ids = wc_get_product_term_ids( $product_id, 'supplier' ); // Loop through cart items checking for product categories foreach ( WC()->cart->get_cart() as $cart_item ) { // Get product categories from product in cart via cart item product id $in_cart_product_tag_ids = array_merge( $in_cart_product_tag_ids, wc_get_product_term_ids( $cart_item['product_id'], 'product_cat' ) ); } // Removes duplicate values $in_cart_product_tag_ids = array_unique( $in_cart_product_tag_ids, SORT_NUMERIC ); // Compare $compare = array_diff( $current_product_tag_ids, $in_cart_product_tag_ids ); // Result is NOT empty if ( !empty ( $compare ) ) { wc_add_notice( 'This product is with a different supplier. Please only order from 1 supplier at a time.', 'error' ); $passed = false; } }}return $passed;}add_filter( 'woocommerce_add_to_cart_validation', 'filter_woocommerce_add_to_cart_validation', 10, 5 );我并不是试图将其限制为每个供应商 1 个产品，而是试图限制他们，以便他们每个订单只能从 1 个供应商处订购产品。例如，一旦他们将供应商“供应商 1”的产品添加到购物篮中，他们将无法添加“供应商 1”以外的任何其他供应商的产品。
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守着一只汪
TA贡献1872条经验 获得超3个赞
以下内容仅允许将来自一个“供应商”的商品添加到购物车：
add_filter( 'woocommerce_add_to_cart_validation', 'only_one_supplier_by_order', 10, 2 );
function only_one_supplier_by_order( $passed, $product_id ) {
if ( WC()->cart->is_empty() )
return $passed;
$taxonomy = 'supplier';
$term_ids = wp_get_post_terms( $product_id, $taxonomy, ['fields' => 'ids']);
// Loop through cart items
foreach ( WC()->cart->get_cart() as $cart_item ) {
if( ! has_term( $term_ids, $taxonomy, $cart_item['product_id'] ) ) {
// Displaying a custom notice
wc_add_notice( __('This product is with a different supplier. Please only order from 1 supplier at a time.'), 'error' );
return false; // Avoid add to cart
}
}
return $passed;
}
现在，为了确保客户无法向购物车中的不同供应商结帐，您可以添加以下内容：
// To be sure (avoiding checkout)
add_action( 'woocommerce_check_cart_items', 'only_one_supplier_by_order_check' );
function only_one_supplier_by_order_check() {
$taxonomy = 'supplier';
$term_names = []; // Initializing
// Loop through cart items
foreach ( WC()->cart->get_cart() as $cart_item ) {
$terms = wp_get_post_terms( $cart_item['product_id'], $taxonomy );
if( ! empty($terms) ) {
$term = reset($terms);
$term_names[$term->term_id] = $term->name;
}
}
// Allow only one supplier in cart (avoid checkout for more than one
if( count( $term_names ) > 1 ) {
// Displaying a custom notice
wc_add_notice( __('Only items from one supplier at the time are allowed in cart'), 'error' );
}
}
代码位于活动子主题（或活动主题）的functions.php 文件中。经过测试并有效。
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