WooCommerce 管理员命令 AJAX 没有得到任何响应?

Question

更新：问题已解决！AJAX 可以工作，但我有函数debug_to_console用于测试哪个echo控制台日志。这是函数：

/* This is a function to print data to web browser console **
** Use debug_to_console( $data ); to print */
function debug_to_console( $data ) {
$output = $data;
if ( is_array( $output ) )
$output = implode( ',', $output);
echo "<script>console.log( 'Debug Objects: " . $output . "' );</script>";
}

在WooCommerce的管理订单页面(WooCommerce>订单>编辑(上，我添加了自定义字段以向订单添加自定义费用。我正在按照这篇文章添加 AJAX，但它不起作用。我成功地注册了我的jQuery脚本并排队add-custom-fee.js并且在大多数情况下它可以工作，但我根本没有收到响应。

在管理订单页面上，我在自定义字段下方添加了以下链接以触发 AJAX：

$nonce = wp_create_nonce('add_custom_fee_nonce');
$link = admin_url('admin_ajax.php?action=add_custom_fee&post_id=' . $order->id . '&nonce=' . $nonce );
echo '<a class="add-custom-fee" data-nonce="' . $nonce . '" data-post_id="' . $order->id . '" href="' . $link . '">Add fee?</a>';

以下是我注册脚本和排队的方式：

add_action('admin_enqueue_scripts', 'load_add_custom_fee_ajax_js');
function load_add_custom_fee_ajax_js( $hook ) {
// Deprecated; append datetime as version number of script
//$my_js_ver = date("ymd-Gis", filemtime( plugin_dir_path( __FILE__ ) . 'js/add-custom-fee.js' ));
// Only register and enqueue on order edit page
if ( 'post.php' == $hook || 'edit.php' == $hook ) {
global $post;
if ('shop_order' === $post->post_type) {
wp_register_script( 'add-custom-fee', get_stylesheet_directory_uri() . '/js/add-custom-fee.js', array('jquery'), 1.0, true );
// enqueue the JavaScript file
wp_enqueue_script( 'jquery' );
wp_enqueue_script( 'add-custom-fee');
// localize the script to reference admin-ajax URL
wp_localize_script( 'add-custom-fee', 'myAjax', array( 'ajaxurl' => admin_url('admin-ajax.php') ) );
}
}
}

这是我的jQuery脚本：

jQuery(document).ready(function () {
console.log("Hello world! Add custom fee JS script enqueued!");
});
/* START of code to add a custom fee to the order in admin and recalculate */
jQuery(document).ready(function ($) {
$('.add-custom-fee').click( function(e) {
e.preventDefault();
console.log("Add fee toggle change detected! Grabbing values...");
// var ajaxurl = 'https://staging1.orderpantry.com/wp-admin/admin-ajax.php';
var add_fee_toggle = $("input[name='add_fee_toggle']:checked").val();
var add_fee_name = $("input[name='add_fee_name']").val();
var add_fee_percentage = $("input[name='add_fee_percentage']").val();
console.log("Toggle? " + add_fee_toggle + ". Fee name: " + add_fee_name + ". Fee percentage: " + add_fee_percentage + "%");
// Remove cookie and do not apply fee
if (add_fee_toggle == '') {
// Clear the fee fields
$("input[name='add_fee_toggle'][value='']").prop('checked', true);
$("#add_fee_name").val('');
$("#add_fee_percentage").val('');
console.log('Fee not added!');
$('button.calculate-action').trigger('click'); // <-- trigger recalculate order
//$('button.save-action').trigger('click');       <-- trigger saving order
} else {
order_id = $(this).attr('data-post_id');
nonce = $(this).attr('data-nonce');
console.log("This order's ID is " + order_id + " and its nonce is " + nonce);
// Push fee values to AJAX function
$.ajax({
type: 'post',
dataType: 'json',
url: myAjax.ajaxurl,
data: {
action: 'create_fee_object',
order_id: order_id,
nonce: nonce,
add_fee_toggle: add_fee_toggle,
add_fee_name: add_fee_name,
add_fee_percentage: add_fee_percentage
},
success: function(response) {
if ( response.type == 'success' ) {
console.log('Success! AJAX request received!');
// Trigger the order to recalculate on success
$('button.calculate-action').trigger('click');
} else {
alert('An error has occurred while adding your fee.');
$('button.calculate-action').trigger('click');
}
}
});
}
});
});

我没有收到任何回应，成功或失败。代码似乎在这里停止工作。

这是我的PHP代码：

add_action('wp_ajax_create_fee_object', 'create_fee_object');
add_action('wp_ajax_nopriv_create_fee_object', 'please_login');
function create_fee_object() {
if ( !wp_verify_nonce( $_REQUEST['nonce'], 'add_custom_fee_nonce' ) ) {
exit("Unsecured access detected!");
}
debug_to_console( "Add fee data reached AJAX function!" );
// Check if action was fired via Ajax call. If yes, JS code will be triggered, else the user is redirected to the post page
if(!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
$result['type'] = 'success';
$result = json_encode($result);
echo $result;
} else {
header("Location: ".$_SERVER["HTTP_REFERER"]);
}
die();
}
function please_login() {
alert("You must log in to do this.");
die();
}

我认为该功能create_fee_object不起作用或 AJAX POST 无法达到它。

知道是什么原因导致它不起作用吗？谢谢！

Answer 1

答：删除debug_to_console( "Add fee data reached AJAX function!" );。

假设您从此 SO 帖子中复制了debug_to_console，那么您将在预期的响应内容上方打印一个<script>标签，因此您不仅不会在回调中看到您的预期数据，而且您的success回调根本不会触发。为什么？因为您已经告诉$.ajax期望 JSON(通过dataType: 'json'(，但 jQuery 在尝试将返回的内容解析为 JSON 时抛出错误。