如何根据自定义字段动态更改WooCommerce结帐中的运输成本?

Question

如何通过Ajax请求更改Woocommerce中的运输成本?我试过了:

add_action('wp_ajax_set_shipping_price', 'set_shipping_price');
add_action('wp_ajax_nopriv_set_shipping_price', 'set_shipping_price');
function set_shipping_price(){
$packages = WC()->cart->get_shipping_packages();
foreach ($packages as $package_key => $package){
$session_key  = 'shipping_for_package_'.$package_key;
$stored_rates = WC()->session->__unset( $session_key );
$WC_Shipping = new WC_Shipping();
$WC_Shipping->calculate_shipping_for_package( $package, $package_key = 0);
WC()->cart->calculate_shipping();
WC()->cart->calculate_totals();
}
wp_die();
}

:

add_filter( 'woocommerce_package_rates', 'custom_shipping_costs', 20, 2 );
function custom_shipping_costs( $rates, $package ) {
if (isset($_POST['cost'])){
$new_cost = $_POST['cost'];
}
$new_cost = 0;
$tax_rate = 0.2;
foreach( $rates as $rate_key => $rate ){
if( $rate->method_id != 'free_shipping'){
$rates[$rate_key]->cost = $new_cost;
$taxes = array();
foreach ($rates[$rate_key]->taxes as $key => $tax){
if( $rates[$rate_key]->taxes[$key] > 0 )
$taxes[$key] = $new_cost * $tax_rate;
}
$rates[$rate_key]->taxes = $taxes;
}
}
return $rates;
}

钩子woocommerce_package_rates在页面加载时工作，但ajax不做任何事情。请帮助。

Answer 1

关于如何获取post数据的说明

此外，您可以使用WooCommerceupdate_checkout事件，在签出中的字段更改或单击(而不是创建自定义Ajax调用)后更新签出(从而重新计算运输成本)。这里有一个完整的清单。 那么，假设您想要重新计算运费，当id为的字段custom_shipping_price(以为例)更改时，可以使用以下脚本:

// updates the checkout (and shipping charge calculation) when the value of a field changes
add_action( 'wp_footer', 'update_checkout' );
function update_checkout() {
// only in the checkout
if ( ! is_checkout() ) {
return;
}
?>
<script type="text/javascript">
jQuery( document ).ready(function( $ ) {
// when the value of the field with id "custom_shipping_price" changes it updates the checkout
jQuery('#custom_shipping_price').change(function(){
jQuery('body').trigger('update_checkout');
});
});
</script>
<?php
}

现在您需要使用woocommerce_package_rates钩子来计算新的运输成本。

确保初始化$new_cost的值变量如果自定义字段未设置或为空。

函数:

// update the shipping cost based on a custom field in the checkout
add_filter( 'woocommerce_package_rates', 'update_shipping_cost_based_on_custom_field', 10, 2 );
function update_shipping_cost_based_on_custom_field( $rates, $package ) {
if ( ! $_POST || is_admin() || ! is_ajax() ) {
return;
}
// gets the post serialized data sent with the Ajax call
if ( isset( $_POST['post_data'] ) ) {
parse_str( $_POST['post_data'], $post_data );
} else {
$post_data = $_POST;
}

// set the cost of shipping (if the custom field should be empty)
$new_cost = 0;
// if the field is set it gets the value
if ( isset( $post_data['custom_shipping_price'] ) && ! empty( $post_data['custom_shipping_price'] ) ) {
// forces conversion of value into number
$new_cost = (float) str_replace( ',', '.', $post_data['custom_shipping_price'] );
}
// set the percentage of taxes (ex. 22%)
$tax_rate = 0.22;
foreach( $rates as $rate_key => $rate ) {
if ( 'free_shipping' !== $rate->method_id ) {
// set rate cost
$rates[$rate_key]->cost = $new_cost;
// set taxes rate cost (if enabled)
$taxes = array();
foreach ( $rates[$rate_key]->taxes as $key => $tax ) {
if ( $rates[$rate_key]->taxes[$key] > 0 ) {
$taxes[$key] = $new_cost * $tax_rate;
}
}
$rates[$rate_key]->taxes = $taxes;
}
}
return $rates;
}

两个代码都已经过测试并正常工作。将它们添加到活动主题的functions.php.