这是基于您的代码问题的完整、干净、经过测试和工作的解决方案。
在这里我已经包含了您的自定义字段key
/value
在相关购物车项目的购物车对象中,而不是在您的calculate_gift_wrap_fee()
功能。
这样就不可能丢失自定义字段值,并且新的价格计算是可靠的。
我已发表评论'gift_wrap_fee'
and 'gift_wrap_price'
因为现在并不真正需要它们(但如果您愿意,您可以取消注释它们)。
这是这段代码:
// The hidden product custom field
add_action( 'woocommerce_before_add_to_cart_button', 'add_gift_wrap_field' );
function add_gift_wrap_field() {
?>
<input type="hidden" id="price_val" name="added_price" value="100.34">
<?php
}
// Adding the custom field to as custom data for this cart item in the cart object
add_filter( 'woocommerce_add_cart_item_data', 'save_custom_fields_data_to_cart', 10, 2 );
function save_custom_fields_data_to_cart( $cart_item_data, $product_id ) {
$bool = false;
$data = array();
if( ! empty( $_REQUEST['added_price'] ) ) {
$cart_item_data['custom_data']['added_price'] = $_REQUEST['added_price'];
// Below this 2 values are not really needed (I think)
// (You can uncomment them if needed)
## $cart_item_data['custom_data']['gift_wrap_fee'] = 'YES';
## $cart_item_data['custom_data']['gift_wrap_price'] = 100;
// below statement make sure every add to cart action as unique line item
$cart_item_data['custom_data']['unique_key'] = md5( microtime().rand() );
WC()->session->set( 'custom_data', $data );
}
return $cart_item_data;
}
// Changing the cart item price based on custom field calculation
add_action( 'woocommerce_before_calculate_totals', 'calculate_gift_wrap_fee', 10, 1 );
function calculate_gift_wrap_fee( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
// Iterating though cart items
foreach ( $cart->get_cart() as $cart_item ) {
// Continue if we get the custom data for the current cart item
if( ! empty( $cart_item['custom_data'] ) ){
// Get the custom field "added price" value
$added_price = number_format( $cart_item['custom_data']['added_price'], 2 );
// The WC_Product object
$product = $cart_item['data'];
// Get the price (WooCommerce versions 2.5.x to 3+)
$product_price = method_exists( $product, 'get_price' ) ? floatval(product->get_price()) : floatval($product->price);
// New price calculation
$new_price = $product_price + $added_price;
// Set the calculeted price (WooCommerce versions 2.5.x to 3+)
method_exists( $product, 'set_price' ) ? $product->set_price( $new_price ) : $product->price = $new_price;
}
}
}
代码位于活动子主题(或主题)的 function.php 文件中或任何插件文件中。
此代码经过测试,适用于 2.5.x 到 3+ 的 WooCommerce 版本。