我已经尝试注册路由，尝试了各种不同的参数，觉得我的代码看起来像这个网站上的许多示例，但不明白为什么它不起作用。

//Register REST Route
add_action(\'rest_api_init\', \'add_advent_api\');

function add_advent_api()
{
    register_rest_route(\'adventapi/v1\', \'/adventapi/\', array(
        \'methods\' => \'WP_REST_Server::READABLE\',
        \'callback\' => function () {
            return \'hello\';
        },
        \'args\' => array(
            \'adventyear\' => array(
                \'required\' => true,
                \'type\' => \'integer\',
                \'description\' => \'Year required\',
                \'minimum\' => 1972,
                \'maximum\' => 9999,
            ),
            \'adventday\' => array(
                \'required\' => true,
                \'type\' => \'integer\',
                \'minimum\' => 1,
                \'maximum\' => 24,
            ),
        ),
        \'permission_callback\' => function () {
            return true;
        }
    ));
}

function advent_query(WP_REST_Request $request)
{
    return \'i work\';
    /*    $adventyear = $_GET[\'adventyear\'];
    $adventday = $_GET[\'adventday\'];

    $args = array(
        \'post_type\' => \'advent\',
        \'meta_query\' => array(
            \'relation\' => \'AND\',
            array(
                \'key\' => \'advent_year\',
                \'value\' => $adventyear,
            ),
            array(
                \'key\' => \'advent_day\',
                \'value\' => $adventday,
            ),

        ),

    );

    $query = new WP_Query($args);

    if ($query->have_posts()) {
        echo \'i ahve posts\';
    } else {
        echo \'No Results\';
    } */
}