基于Woocommerce中产品数量订购的普通产品

Question

在我的网站上，我使用WooCommerce v3.1 +和Woocommerce订阅。我的产品包含摄像机和订阅计划等项目。我想这样做的是：

• 购买相机和订阅计划时，在购物车页面（结帐前），认购计划的数量必须等于摄像机的数量，
• 如果另一个相机被添加到购物车中，必须出现错误按摩......或类似的东西。

例如，如果我的购物车中有2个特定产品，如相机（数量为2）和订购计划（数量为1），则客户将无法结帐，如果订购计划数量不与相机数量相匹配。

我相信我必须修改儿童主题中的functions.php。任何帮助，将不胜感激

---

编辑：我加了一段在functions.php的代码，但是这将在购物车中添加X2总笔数：

add_action('woocommerce_check_cart_items', 'wh_wc_minimum_order_amount'); 
function wh_wc_minimum_order_amount() { 
    $minimum = 2; 
    if (WC()->cart->get_cart_contents_count() % $minimum != 0) { 
     // wc_clear_notices(); 
     wc_add_notice(sprintf('<strong>Error: check product quantity</strong>', $minimum), 'error'); 
    } 
} 

所以这是行不通的。

Answer 1

这是一个完整的解决方案，当正常产品计数与订阅计划不匹配时，将显示自定义通知，轻轻提醒客户。如果产品不符合您的要求，客户将从结帐重定向到（避开结账）。

代码（评论）：

// Replacing add to cart button link on shop and archives 
add_filter('woocommerce_loop_add_to_cart_link', 'replacing_add_to_cart_button', 10, 2); 
function replacing_add_to_cart_button($button, $product) { 
    if($product->is_type('variable-subscription') || $product->is_type('variable')) return $button; 

    $button_text = __('View product', 'woocommerce'); 
    $button = '<a class="button" href="' . $product->get_permalink() . '">' . $button_text . '</a>'; 
    return $button; 
} 

// Counting cart items (utility function) 
function counting_cart_items($subscriptions_count = 0, $products_count = 0, $wc_cart = '') { 
    $cart_obj = $wc_cart != '' ? $wc_cart : WC()->cart; 
    foreach($cart_obj->get_cart() as $cart_item){ 
     if ($cart_item['data']->is_type('subscription')) 
      $subscriptions_count += intval($cart_item['quantity']); 
     else 
      $products_count += intval($cart_item['quantity']); 
    } 
    return array('subscrip' => $subscriptions_count, 'product' => $products_count); 
} 

// Displaying Notification messages (utility function) 
function conditionally_display_notice($subscriptions_count, $products_count) { 
    $count = $subscriptions_count - $products_count; 
    if($subscriptions_count < $products_count) 
     $txt = sprintf(_n('%s subscription plan', '%s subscriptions plans', -$count, 'woocommerce'), -$count); 
    elseif($subscriptions_count > $products_count) 
     $txt = sprintf(_n('%s product', '%s products', $count, 'woocommerce'), $count); 
    if($subscriptions_count != $products_count) 
     wc_add_notice(sprintf(__("You need to add %s, to be able to checkout", "woocommerce"), $txt), "notice"); 
} 

// Checking and notifying when products are added to cart 
add_filter('woocommerce_add_to_cart_validation', 'conditionally_check_add_to_cart', 10, 3); 
function conditionally_check_add_to_cart($passed, $product_id, $quantity) { 
    $items_count = counting_cart_items(); // Counting cart items 
    $product = wc_get_product($product_id); // Get an instance of the WC_Product object 

    // Get the total live count 
    if($product->is_type('subscription')) 
     $items_count['subscrip'] += intval($quantity); 
    else 
     $items_count['product'] += intval($quantity); 

    // Notification messages 
    conditionally_display_notice($items_count['subscrip'], $items_count['product']); 
    return $passed; 
} 

// Conditionally checking and adding your subscription when a product is added to cart 
add_action('woocommerce_before_main_content', 'display_notice_on_shop_archives'); 
function display_notice_on_shop_archives() { 
    if(is_product()) return; 
    $items_count = counting_cart_items(); // Counting cart items 

    // Notification messages 
    conditionally_display_notice($items_count['subscrip'], $items_count['product']); 
    wc_print_notices(); 
} 
/* 
// Conditionally checking and adding your subscription when a product is added to cart 
add_action('woocommerce_add_to_cart', 'conditionally_check_add_to_cart', 10, 6); 
function conditionally_check_add_to_cart($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) { 
    $items_count = counting_cart_items(); // Counting cart items 
    $product = wc_get_product($product_id); // Get an instance of the WC_Product object 

    // Get the updated count 
    if($product->is_type('subscription')) 
     $items_count['subscrip'] += intval($quantity); 
    else 
     $items_count['product'] += intval($quantity); 

    // Notification messages 
    conditionally_display_notice($items_count['subscrip'], $items_count['product']); 
} 
*/ 
// Checking and validating when updating cart item quantities 
add_filter('woocommerce_update_cart_validation', 'conditionally_check_cart_update', 10, 4); 
function conditionally_check_cart_update($passed, $cart_item_key, $values, $updated_quantity) { 
    $items_count = counting_cart_items(); // Counting cart items 

    // Get the updated count 
    if($values['data']->is_type('subscription')) 
     $items_count['subscrip'] += intval(-$values['quantity'] + $updated_quantity); 
    else 
     $items_count['product'] += intval(-$values['quantity'] + $updated_quantity); 

    // Notification messages 
    conditionally_display_notice($items_count['subscrip'], $items_count['product']); 
    return $passed; 
} 

// Checking and validating when updating cart item quantities 
add_filter('woocommerce_cart_item_removed', 'conditionally_check_removed_cart_item', 10, 2); 
function conditionally_check_removed_cart_item($cart_item_key, $wc_cart) { 
    $items_count = counting_cart_items(0, 0, $wc_cart); // Counting cart items 

    // Notification messages 
    conditionally_display_notice($items_count['subscrip'], $items_count['product']); 
} 

// Checking and conditionally redirecting to shop page 
add_action('template_redirect', 'conditional_checkout_redirection'); 
function conditional_checkout_redirection(){ 
    if (is_checkout()) { 
     $items_count = counting_cart_items(); // Counting cart items 

     if ($items_count['subscrip'] != $items_count['product']) { 
      // redirecting to shop page 
      wp_redirect(get_permalink(woocommerce_get_page_id('shop'))); 
      exit(); // always exit 
     } 
    } 
} 

代码放在您的活动子主题（或主题）的function.php文件或也以任何插件文件。

此代码对Woocommerce 3+测试和工程