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檢查Woocommerce中購物車中是否有產品變化

[英]Check if a product variation is in cart in Woocommerce

我正在嘗試顯示購物車中是否已經存在某個產品的變體(在單個產品頁面中)。 產品ID與購物車對象中產品的簡單比較不適用於可變產品,因為使用ajax加載了版本ID。

這是我的代碼,以防產品類型不是變量。

<?php
/*
 * Check if Product Already In Cart
*/
function woo_in_cart( $product_id ) {
    global $woocommerce;

    if ( !isset($product_id) ) {
        return false;
    }

    foreach( $woocommerce->cart->get_cart() as $cart_item ) {
        if ( $cart_item['product_id'] === $product_id ){
            return true;
        } else {
            return false;
        }
    }
}  

有沒有什么方法可以使它在沒有jQuery的情況下工作?

您是說$product_id可能是變體的ID嗎? 如果是這樣,您可以僅獲取父ID(如果存在):

/*
 * Check if Product Already In Cart
 */
function woo_in_cart( $product_id ) {
    global $woocommerce;

    if ( ! isset( $product_id ) ) {
        return false;
    }

    $parent_id  = wp_get_post_parent_id( $product_id );
    $product_id = $parent_id > 0 ? $parent_id : $product_id;

    foreach ( $woocommerce->cart->get_cart() as $cart_item ) {
        if ( $cart_item['product_id'] === $product_id ) {
            return true;
        } else {
            return false;
        }
    }
}

如果您的意思是您的購物車商品是一種變體,並且$product_id已經是父商品ID,那么您的代碼應該已經可以正常使用了。

$cart_item具有2個ID: $cart_item['product_id']$cart_item['variation_id']

因此product_id將始終是父產品的ID。

要處理單個產品頁面(以及到處都是簡單產品)之外的產品變化:

// Check if Product Already In Cart (Work with product variations too)
function woo_in_cart( $product_id = 0 ) {
    $found = false;
    if ( isset($product_id) || 0 == $product_id )
        return $found;

    foreach( WC()->cart->get_cart() as $cart_item ) {
        if ( $cart_item['data']->get_id() == $product_id )
            $found = true;
    }
    return $found;
}

要處理單個產品頁面內的產品變體,需要使用javascript。

當選定的版本已在購物車中時,以下示例將顯示自定義消息:

// Frontend: custom select field in variable products single pages
add_action( 'wp_footer', 'action_before_add_to_cart_button' );
function action_before_add_to_cart_button() {
    if( ! is_product() ) return;

    global $product;

    if( ! is_object($product) )
        $product = wc_get_product( get_the_id() );

    // Only for variable products when cart is not empty
    if( ! ( $product->is_type('variable') && ! WC()->cart->is_empty() ) ) return; // Exit

    $variation_ids_in_cart = array();

    // Loop through cart items
    foreach( WC()->cart->get_cart() as $cart_item ) {
        // Collecting product variation IDs if they are in cart for this variable product
        if ( $cart_item['variation_id'] > 0 && in_array( $cart_item['variation_id'], $product->get_children() ) )
            $variation_ids_in_cart[] = $cart_item['variation_id'];
    }

    // Only if a variation ID for this variable product is in cart
    if( sizeof($variation_ids_in_cart) == 0 ) return; // Exit

    // Message to be displayed (if the selected variation match with a variation in cart
    $message = __("my custom message goes here", "woocommerce");
    $message = '<p class="custom woocommerce-message" style="display:none;">'.$message.'</p>';

    // jQuery code
    ?>
    <script>
    (function($){
        // Utility function that check if variation match and display message
        function checkVariations(){
            var a = 'p.woocommerce-message.custom', b = false;
            $.each( <?php echo json_encode($variation_ids_in_cart); ?>, function( k, v ){
                if( $('input[name="variation_id"]').val() == v ) b = true;
            });
            if(b) $(a).show(); else $(a).hide();
        }

        // On load (when DOM is rendered)
        $('table.variations').after('<?php echo $message; ?>');
        setTimeout(function(){
            checkVariations();
        }, 800);

        // On live event: product attribute select fields "blur" event
        $('.variations select').blur( function(){
            checkVariations();
        });
    })(jQuery);
    </script>
    <?php
}

代碼進入您的活動子主題(或活動主題)的function.php文件中。 經過測試和工作。

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