我正在跟踪this 创建WP-API自定义端点的教程。

我总是在击球时出错/wp-json/custom-plugin/v2/get-all-post-ids/ 在…上postman 要测试：

     {  
       "code": "rest_no_route",  
       "message": "No route was found matching
        the URL and request method", 
        "data":
         {
            "status": 404
         }

    }

我已经创建了一个自定义插件。php文件位于/plugins/custom-plugin/directory。

<?php


    if ( ! defined( \'ABSPATH\' ) ) exit;

    add_action( \'rest_api_init\', \'dt_register_api_hooks\' );

    function dt_register_api_hooks() {    

        register_rest_route( \'custom-plugin/v2\', \'/get-all-post-ids/\', array(
            \'methods\' => \'GET\',
            \'callback\' => \'dt_get_all_post_ids\',
            ) 
            );

    }


    // Return all post IDs
    function dt_get_all_post_ids() {
        if ( false === ( $all_post_ids = get_transient( \'dt_all_post_ids\' ) ) ) {
            $all_post_ids = get_posts( array(
                \'numberposts\' => -1,
                \'post_type\'   => \'post\',
                \'fields\'      => \'ids\',
            ) );
            // cache for 2 hours
            set_transient( \'dt_all_post_ids\', $all_post_ids, 60*60*2 );
        }

        return $all_post_ids;
    }

?>

请指导我如何解决此问题。

谢谢