Php 如果某一特定产品类别中的任何项目已在Woocommerce中购买，则仅购买一次产品或不购买

在woocommerce中，我只使用简单的产品，我有一个来自产品类别“a”的特殊产品“免费试用包”，我愿意：

让客户只购买一次此“免费试用套餐”

如果客户先购买同一产品类别“A”的其他产品，则客户无法再购买此“免费试用包”

这意味着客户只有在首次购买该产品类别“A”时才能获得“免费试用包”

我的代码似乎工作不正常，它只做了第一点

另一个问题是，如果用户订单完成，下次用户打开购物车时会显示一条奇怪的消息： “你不能再选择这个产品了，你已经买了这个软件包。”这就像是电子商务缓存问题或其他什么

以下是我目前的代码：

function sv_disable_repeat_purchase( $purchasable, $product ) {
    $non_purchasable = 190;

    $product_id = $product->is_type( 'variation' ) ? $product->variation_id : $product->id;

    if ( $product_id != $non_purchasable ) {
        $purchasable = true;
    }

    if ( wc_customer_bought_product( wp_get_current_user()->user_email, get_current_user_id(), $product_id ) ) {
        $purchasable = false;
    }

    if ( $purchasable && $product->is_type( 'variation' ) ) {
        $purchasable = $product->parent->is_purchasable();
    }

    return $purchasable;
}
add_filter( 'woocommerce_variation_is_purchasable', 'sv_disable_repeat_purchase', 10, 2 );
add_filter( 'woocommerce_is_purchasable', 'sv_disable_repeat_purchase', 10, 2 );

---

非常感谢您的帮助。

更新2

function wc_customer_purchased_product_in_cat( $product ) {

    // enter the category for which a single purchase is allowed
    $non_repeatable = 'ADD YOUR CATEGORY HERE';

    // bail if this product is in not in our target category
    if ( ! has_term( $non_repeatable, 'product_cat', $product->get_id() ) ) {
        return false;
    }

    // the product has our target category, so return whether the customer purchased
    return wc_customer_bought_product( wp_get_current_user()->user_email, get_current_user_id(), $product->get_id() );
}

function wc_disable_repeat_purchase( $purchasable, $product ) {

    if ( wc_customer_purchased_product_in_cat( $product ) ) {
        $purchasable = false;
    }

    // double-check for variations: if parent is not purchasable, then variation is not
    if ( $purchasable && $product->is_type( 'variation' ) ) {
        $purchasable = $product->parent->is_purchasable();
    }

    return $purchasable;
}
add_filter( 'woocommerce_variation_is_purchasable', 'wc_disable_repeat_purchase', 10, 2 );
add_filter( 'woocommerce_is_purchasable', 'wc_disable_repeat_purchase', 10, 2 );

根据“”回答代码，如果“试用包”产品已经购买过一次，或者定义的“a”类产品的任何产品已经购买过，则以下内容将阻止从该产品购买

您的实际代码从Woocommerce 3开始就过时了，并且出现了一些错误

我使用一个定制的条件函数来检查客户是否可以购买“免费试用”产品。此功能还将检查产品ID或产品类别：

function has_bought_items( $user_id = 0, $product_ids = 0, $categories_slugs = '' ) {
    global $wpdb;
    $customer_id = $user_id == 0 || $user_id == '' ? get_current_user_id() : $user_id;
    $statuses    = array_map( 'esc_sql', wc_get_is_paid_statuses() );

    if ( is_array( $product_ids ) ) {
        $product_ids = implode(',', $product_ids);
    }

    if ( $product_ids !=  ( 0 || '' ) ) {
        $query_in = "IN ($product_ids)";
    }
    else {
        $categories = is_array( $categories_slugs ) ? implode("','", $categories_slugs) : $categories_slugs;

        $query_in = "IN (
        SELECT DISTINCT products.ID  FROM {$wpdb->prefix}posts AS products
        INNER JOIN {$wpdb->prefix}term_relationships as term_rel
            ON products.ID = term_rel.object_id
        INNER JOIN {$wpdb->prefix}term_taxonomy as term_tax
            ON term_rel.term_taxonomy_id = term_tax.term_taxonomy_id
        INNER JOIN {$wpdb->prefix}terms as terms
            ON term_tax.term_taxonomy_id = terms.term_id
        WHERE products.post_status = 'publish'
        AND term_tax.taxonomy = 'product_cat'
        AND terms.slug IN ('$categories')
        )";
    }

    // Count the number of products
    $product_count_query = $wpdb->get_var( "
        SELECT DISTINCT COUNT(orders.ID)
        FROM {$wpdb->prefix}posts AS orders
        INNER JOIN {$wpdb->prefix}postmeta AS order_meta
            ON orders.ID = order_meta.post_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_items AS order_items
            ON orders.ID = order_items.order_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_itemmeta AS order_itemmeta
            ON order_items.order_item_id = order_itemmeta.order_item_id
        WHERE orders.post_status IN ( 'wc-" . implode( "','wc-", $statuses ) . "' )
        AND order_meta.meta_key = '_customer_user'
        AND order_meta.meta_value = $customer_id
        AND order_itemmeta.meta_key IN ( '_product_id', '_variation_id' )
        AND order_itemmeta.meta_value $query_in
    " );

    // Return a boolean value if count is higher than 0
    return $product_count_query > 0 ? true : false;
}

使用上述自定义条件函数重新访问的代码：

// add_filter( 'woocommerce_variation_is_purchasable', 'trial_package_purchasable_once', 10, 2 );
add_filter( 'woocommerce_is_purchasable', 'trial_package_purchasable_once', 10, 2 );
function trial_package_purchasable_once( $purchasable, $product ) {
    // HERE set the free trial product Id to be purchased only once (can be an array of Ids too)
    $free_trial_id = 50;

    // HERE set the specific product category SLUG (could be an array of slugs too)
    $categories = array('lettering'); // Only slug terms

        if ( $product->get_id() == $free_trial_id ) {
            // Check if any item of the specific product category has already been purchased once
            if ( has_bought_items( get_current_user_id(), '', $categories ) ) {
                return false;
            }
            // Check if the free trial product has already been purchased once
            elseif ( has_bought_items( get_current_user_id(), $free_trial_id ) ) {
                return false;
            }
        }
    }

    return $purchasable;
}

代码进入活动子主题（或活动主题）的function.php文件。测试和工作

---

要处理产品类别术语ID而不是术语段塞，请改用以下条件函数：

// For Product category(ies) Id(s)
function has_bought_items( $user_id = 0, $product_ids = 0, $categories_ids = '' ) {
    global $wpdb;
    $customer_id = $user_id == 0 || $user_id == '' ? get_current_user_id() : $user_id;
    $statuses    = array_map( 'esc_sql', wc_get_is_paid_statuses() );

    if ( is_array( $product_ids ) ) {
        $product_ids = implode(',', $product_ids);
    }

    if ( $product_ids !=  ( 0 || '' ) ) {
        $query_in = "IN ($product_ids)";
    }
    else {
        $categories = is_array( $categories_ids ) ? implode(',', $categories_ids) : $categories_ids;

        $query_in = "IN (
        SELECT DISTINCT products.ID  FROM {$wpdb->prefix}posts AS products
        INNER JOIN {$wpdb->prefix}term_relationships as term_rel
            ON products.ID = term_rel.object_id
        INNER JOIN {$wpdb->prefix}term_taxonomy as term_tax
            ON term_rel.term_taxonomy_id = term_tax.term_taxonomy_id
        INNER JOIN {$wpdb->prefix}terms as terms
            ON term_tax.term_taxonomy_id = terms.term_id
        WHERE products.post_status = 'publish'
        AND term_tax.taxonomy = 'product_cat'
        AND terms.term_id IN ($categories)
        )";
    }

    // Count the number of products
    $product_count_query = $wpdb->get_var( "
        SELECT DISTINCT COUNT(orders.ID)
        FROM {$wpdb->prefix}posts AS orders
        INNER JOIN {$wpdb->prefix}postmeta AS order_meta
            ON orders.ID = order_meta.post_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_items AS order_items
            ON orders.ID = order_items.order_id
        INNER JOIN {$wpdb->prefix}woocommerce_order_itemmeta AS order_itemmeta
            ON order_items.order_item_id = order_itemmeta.order_item_id
        WHERE orders.post_status IN ( 'wc-" . implode( "','wc-", $statuses ) . "' )
        AND order_meta.meta_key = '_customer_user'
        AND order_meta.meta_value = $customer_id
        AND order_itemmeta.meta_key IN ( '_product_id', '_variation_id' )
        AND order_itemmeta.meta_value $query_in
    " );

    // Return a boolean value if count is higher than 0
    return $product_count_query > 0 ? true : false;
}

---

对于带有特殊字符的外语来说，这是更好的选择。

产品id在哪里？！它不起作用，我先买了20美元的套餐，然后我试着买了免费套餐，我做到了！它实际上是这样做的，它让你买任何东西，只要你买了免费的包装，你就不能买任何东西！我想要的是，只有当你订购免费套餐作为开始购买时，你才可以购买它，但如果你这样做了，你就不能再购买它，如果你购买免费套餐以外的任何东西，你就不能再次选择免费套餐当我购买免费套餐时，它不仅不会让我从同一个类别购买，而且也不会让我再次购买！“添加到购物车”按钮在所有内容上完全消失！嗯，代码似乎需要在每个ifOn的第一个函数中以某种形式返回替换

和terms.slug in（$categories）

by

和terms.name in（$categories）

…或在最后一个函数

和terms.term\u id in（$categories）

中替换

和terms.name in（$categories）