我想使用jQuery Ajax重新加载页面。我有下面的代码，但是，它不工作，正在返回错误[object Object]

这只是一个简单的语法问题，还是我的整个逻辑都有问题？它在没有Javascript的情况下工作得很好，但我认为使用jQuery Ajax的UI更直观。

functions.php

//enqueue scripts
function my_theme_enqueue_scripts() {
     wp_enqueue_script(\'jquery-ui\', \'https://code.jquery.com/ui/1.12.1/jquery-ui.min.js\', array(\'jquery\'), \'1.12.1\');
     wp_register_script( \'myjs\', get_stylesheet_directory_uri() . \'/my.js\', array(\'jquery\'),\'1.0.0\');
     wp_enqueue_script(\'myjs\');
     wp_localize_script( \'ajax-script\', \'admin-ajax\', array( \'ajax_url\' => admin_url( \'admin-ajax.php\' ) ) );
}
add_action( \'wp_enqueue_scripts\', \'my_theme_enqueue_scripts\' );

function load_projectmessages($projectid) {
     global $wpdb;
     $sql_displaymessages = $wpdb->prepare("some sql", $projectid );
     $projectmessages = $wpdb->get_results($sql_displaymessages);
     return $projectmessages;
     wp_die();
}
add_action(\'wp_ajax_load_projectmessages\', \'load_projectmessages\');

Page Template PHP:

<form id="form-pm" method="post" enctype="multipart/form-data" action="">
            <table>
                <tr>
                    <td><textarea name="projectMessage" rows=3 id="project-message"></textarea></td>
                </tr>
                <tr>
                    <td><input type="submit" name="send" value="send message"></td>
                </tr>
            </table>
        </form>

my.js

function getUrlVars()
    {
        var vars = [], hash;
        var hashes = window.location.href.slice(window.location.href.indexOf(\'?\') + 1).split(\'&\');
        for(var i = 0; i < hashes.length; i++)
        {
            hash = hashes[i].split(\'=\');

            if($.inArray(hash[0], vars)>-1)
            {
                vars[hash[0]]+=","+hash[1];
            }
            else
            {
                vars.push(hash[0]);
                vars[hash[0]] = hash[1];
            }
        }
        return vars;
    }

    $("#form-pm").submit(function(e) {

        e.preventDefault();
        var pID = getUrlVars()["id"];
        $.ajax({
            url: "admin-ajax.ajax_url",
            type: "POST",
            data: {
                action: "load_projectmessages",
                projectid: pID
            },
            success: function(data) { },
            error: function(errorData) { alert(errorData); }
        });
        return false;
    });