我需要检查一下客户是否在WooCommerce中购买了特定产品。
情况是这样的：除非客户在较早时间购买产品“a”或“b”，否则客户不能购买产品“c”，“d”，“e”。
如果客户较早购买了产品“a”或“b”，则激活产品“c”，“d”和“e”的购买按钮，并允许他们购买。
如果他们之前没有购买“a”或“b”，他们将不被允许购买“c”，“d”，“e”并且购买按钮被停用。
我怎样才能做到这一点？
谢谢。
更新（Woocommerce 3+的兼容性）
是的，如果当前客户已经购买了特定的定义产品ID，则编写一个返回“true”的条件函数。此代码位于活动子主题或主题的function.php文件中。
这是条件函数：
function has_bought_items() {
$bought = false;
// Set HERE ine the array your specific target product IDs
$prod_arr = array( '21', '67' );
// Get all customer orders
$customer_orders = get_posts( array(
'numberposts' => -1,
'meta_key' => '_customer_user',
'meta_value' => get_current_user_id(),
'post_type' => 'shop_order', // WC orders post type
'post_status' => 'wc-completed' // Only orders with status "completed"
) );
foreach ( $customer_orders as $customer_order ) {
// Updated compatibility with WooCommerce 3+
$order_id = method_exists( $order, 'get_id' ) ? $order->get_id() : $order->id;
$order = wc_get_order( $customer_order );
// Iterating through each current customer products bought in the order
foreach ($order->get_items() as $item) {
// WC 3+ compatibility
if ( version_compare( WC_VERSION, '3.0', '<' ) )
$product_id = $item['product_id'];
else
$product_id = $item->get_product_id();
// Your condition related to your 2 specific products Ids
if ( in_array( $product_id, $prod_arr ) )
$bought = true;
}
}
// return "true" if one the specifics products have been bought before by customer
return $bought;
}
此代码经过测试和运行。
用法： 例如，您可以在以前复制到活动子主题或主题的某些WooCommerce templates中使用它：
add-to-cart按钮的Shop页面的模板是loop/add-to-cart.php。add-to-cart按钮的产品页面模板位于single-product/add-to-cart folder，具体取决于您的产品类型。以下是您可以在这些模板中使用的示例（上图）：
// Replace the numbers by your special restricted products IDs
$restricted_products = array( '20', '32', '75' );
// compatibility with WC +3
$product_id = method_exists( $product, 'get_id' ) ? $product->get_id() : $product->id;
// customer has NOT already bought a specific product for this restricted products
if ( !has_bought_items() && in_array( $product_id, $restricted_products ) ) {
// Displaying an INACTIVE add-to-cart button (With a custom text, style and without the link).
// (AND optionally) an explicit message for example.
// ALL OTHER PRODUCTS OR RESTRICTED PRODUCTS IF COSTUMER HAS ALREADY BOUGHT SPECIAL PRODUCTS
} else {
// place for normal Add-To-Cart button code here
}
这里是商店页面上add-to-cart按钮模板的完整应用示例：
<?php
/**
* Loop Add to Cart
*
* This template can be overridden by copying it to yourtheme/woocommerce/loop/add-to-cart.php.
*
* HOWEVER, on occasion WooCommerce will need to update template files and you
* (the theme developer) will need to copy the new files to your theme to
* maintain compatibility. We try to do this as little as possible, but it does
* happen. When this occurs the version of the template file will be bumped and
* the readme will list any important changes.
*
* @see https://docs.woocommerce.com/document/template-structure/
* @author WooThemes
* @package WooCommerce/Templates
* @version 2.5.0
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
global $product;
// Replace the numbers by your special restricted products IDs
$restricted_products = array( '37', '53', '70' );
// compatibility with WC +3
$product_id = method_exists( $product, 'get_id' ) ? $product->get_id() : $product->id;
if ( !has_bought_items() && in_array( $product_id, $restricted_products ) ) {
echo '<a class="button greyed_button">' . __("Disabled", "your_theme_slug") . '</a>';
echo '<br><span class="greyed_button-message">' . __("Your message goes here…", "your_theme_slug") . '</span>';
} else {
echo apply_filters( 'woocommerce_loop_add_to_cart_link',
sprintf( '<a rel="nofollow" href="%s" data-quantity="%s" data-product_id="%s" data-product_sku="%s" class="%s">%s</a>',
esc_url( $product->add_to_cart_url() ),
esc_attr( isset( $quantity ) ? $quantity : 1 ),
esc_attr( $product_id ),
esc_attr( $product->get_sku() ),
esc_attr( isset( $class ) ? $class : 'button' ),
esc_html( $product->add_to_cart_text() )
),
$product );
}
您将使用活动子主题或主题的greyed_button文件中的style.css类设置非活动按钮的样式。与greyed_button-message类的消息相同。
在这种情况下，也可以使用内置的woocommerce功能wc_customer_bought_product。
请参阅函数用法here。
新版紧凑，更轻，更快，兼容所有版本的woocommerce（2.4及以上版本）
这是新的增强和更轻的条件功能，部分基于内置的woocommerce功能wc_customer_bought_product源代码。
有两个可选参数$user_id和$product_ids：
$user_id将允许您指定已定义的用户ID（当不用于当前登录用户时）;$product_ids（数组）将允许指定要检查的已定义产品ID这是代码：
function has_bought_items( $user_id = 0, $product_ids = 0 ) {
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 || '' ) )
$query_line = "AND woim.meta_value IN ($product_ids)";
else
$query_line = "AND woim.meta_value != 0";
// Count the number of products
$product_count_query = $wpdb->get_var( "
SELECT COUNT(p.ID) FROM {$wpdb->prefix}posts AS p
INNER JOIN {$wpdb->prefix}postmeta AS pm ON p.ID = pm.post_id
INNER JOIN {$wpdb->prefix}woocommerce_order_items AS woi ON p.ID = woi.order_id
INNER JOIN {$wpdb->prefix}woocommerce_order_itemmeta AS woim ON woi.order_item_id = woim.order_item_id
WHERE p.post_status IN ( 'wc-" . implode( "','wc-", $statuses ) . "' )
AND pm.meta_key = '_customer_user'
AND pm.meta_value = $customer_id
AND woim.meta_key IN ( '_product_id', '_variation_id' )
$query_line
" );
// Return a boolean value if count is higher than 0
return $product_count_query > 0 ? true : false;
}
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。
此代码在Woocommerce 3+上进行测试并且可以工作（它也应该适用于以前的版本）。
用法示例：
示例1（登录客户）：检测当前用户是否已购买其中一个已定义的产品（产品ID需要为阵列）
// Define the targeted Products IDs
$product_ids = array( 38, 41, 85, 95 );
if( has_bought_items( '', $product_ids ) )
echo "<p>You have already purchased one of this products</p>";
else
echo "<p>You have not yet purchased one of this products</p>";
示例2（设置$user_id）检测定义的用户是否已购买其中一个已定义的产品（产品ID需要是一个数组）
// Define the user ID
$user_id = 85;
// Define the targeted Products IDs
$product_ids = array( 38, 41, 85, 95 );
if( has_bought_items( $user_id, $product_ids ) )
echo "<p>This user have already purchased one of this products</p>";
else
echo "<p>This user have not yet purchased one of this products</p>";
如果未定义$user_id且当前用户未登录，则此函数将返回false。
示例3（登录客户）：检测当前用户是否已进行购买
if( has_bought_items() )
echo '<p>You have already made a purchase</p>';
else
echo '<p>Welcome, for your first purchase you will get a discount of 10%</p>';
示例4（设置$user_id）检测已定义的用户是否已进行购买
// Define the user ID
$user_id = 85;
if( has_bought_items( $user_id ) )
echo '<p>customer have already made a purchase</p>';
else
echo '<p>Customer with 0 purshases</p>';
现在，如果未定义
$user_id且当前用户未登录，则此函数将返回false。
我会这样做的;
这不会做任何woocommerce模板修改，但只使用过滤器woocommerce_is_purchasable
这些都是功能，
wc_customer_bought_product以检查客户是否已经带来了产品，我以前从未使用过它但是根据文档您可以创建如下功能检查产品ID的数组（如果其中一个已经带来）;
function cmk_check_product_brought( $ids=array() ) {
if ( ! $ids ) return false;
foreach ( $ids as $product => $id ) {
if ( wc_customer_bought_product( wp_get_current_user()->user_email, get_current_user_id(), $id ) ) {
return true;
}
}
}
我之前检查客户是否已经提供特定产品ID的方法如下，所以您可以使用这些功能中的任何一个，尽管我创建的那个不是用于ID的数组
function cmk_product_ordered( $id ) {
// Get All order of current user
$orders = get_posts( array(
'numberposts' => -1,
'meta_key' => '_customer_user',
'meta_value' => get_current_user_id(),
'post_type' => wc_get_order_types( 'view-orders' ),
'post_status' => array_keys( wc_get_order_statuses() )
) );
if ( !$orders ) return false; // return if no order found
$all_ordered_product = array(); // store all products ordered by ID in an array
foreach ( $orders as $order => $data ) { // Loop through each order
$order_data = new WC_Order( $data->ID ); // create new object for each order
foreach ( $order_data->get_items() as $key => $item ) { // loop through each order item
// store in array with product ID as key and order date a value
$all_ordered_product[ $item['product_id'] ] = $data->post_date;
}
}
// check if defined ID is found in array
if ( isset( $all_ordered_product[ $id ] ) ) return true;
else return false;
}
woocommerce_is_purchasable上添加一个过滤器来创建我们自己的条件，下面这个函数就是你想要实现的一个简单的例子，只是改变了$required_purchased和$conditional_purchase值。
function cmk_disable_product_purchase( $purchasable, $product ) {
// array of products required to be purchase first
$required_purchased = array( 1, 2);
// array of restricted/conditional products to be purchase
$conditional_purchase = array( 3,4,5);
// Get the ID for the current product
$product_id = $product->is_type( 'variation' ) ? $product->variation_id : $product->id;
//return default $purchasable if current product ID is not in restricted array
if ( !in_array($product_id, $conditional_purchase)) return $purchasable;
/**
** Check if one required products has been purchase;
**/
// using cmk_check_product_brought() function, return false if product is not purchase
if ( ! cmk_check_product_brought( $required_purchased ) ) $purchasable = false;
// using cmk_product_ordered() function, you can use this instead
/*if ( cmk_product_ordered( 1 ) || cmk_product_ordered( 2 ) ) {
$purchasable = $purchasable; //return default if one product is purchased
} else {
$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', 'cmk_disable_product_purchase', 10, 2 );
add_filter( 'woocommerce_is_purchasable', 'cmk_disable_product_purchase', 10, 2 );
这应该将产品设置为不可购买（添加到购物车按钮将自动隐藏）。现在，如果您想为不可购买的产品添加消息，您可以简单地使用cmk_disable_product_purchase的相同条件，添加您的消息并将其挂钩在woocommerce_single_product_summary或您希望它显示的任何地方。