我正在为REST API集成（WP 4.7核心版本）准备一个插件，为插件中的数据提供自定义端点。我想做的一件事就是_links 属性，并使链接的资源可嵌入。高度简化的代码摘录：

class Clgs_REST_Logs extends WP_REST_Controller {
    const NSPACE = \'clgs\';
    const BASE = \'logs\';

    public function register_routes() {
        register_rest_route( self::NSPACE, \'/\' . self::BASE, array(
            array(
                \'methods\'   => WP_REST_Server::READABLE,
                \'callback\'  => array( $this, \'get_items\' ),
             ),
            \'schema\' => array( $this, \'get_public_item_schema\' ),
        ) );
        register_rest_route( self::NSPACE, \'/\' . self::BASE . \'/count\', array(
            array(
                \'methods\'   => WP_REST_Server::READABLE,
                \'callback\'  => array( $this, \'get_count\' ),
            ),
            \'schema\' => array( $this, \'get_count_schema\' ),
        ) );
    }

    public function get_items( $request ) {
        $log_entries = // get an array

        $collection = $this->prepare_collection_for_response( $log_entries, $request );
        $response = rest_ensure_response( array(
            \'items\' => $collection
         ) );

        $max_pages = max( 1, ceil( $total_items / (int) $params[\'per_page\'] ) );

        $this->set_count_headers( $response, (int) $total_items, (int) $max_pages );

        $count_link =  $this->prepare_link_url( array( self::BASE, \'count\' ) );
        $response->add_links( array (
            \'count\'  => array(
                \'href\' => $count_link,
                \'embeddable\' => true
            ),
        ) );

        return $response;
    }

    public function get_count( $request ) {
        // provide some statistics data
    }

    public function prepare_link_url ( $parts = array() ) {
        array_unshift( $parts, self::NSPACE );
        return rest_url( implode( \'/\', $parts ) . \'/\' );
    }
}

{
    "items": [...],
    "_links": {
        "count": [{
            "embeddable": true,
            "href": "http://wptesting.intern/index.php/wp-json/clgs/logs/"
        }]
    },
    "_embedded": {
        "count": [{
            "code": "rest_no_route",
            "message": "No route was found matching the URL and request method",
            "data": {"status":404}
        }]
    }
}

我在禁用了premalinks和http://wptesting.intern/index.php/?route=... 要确保这不是路由重写问题，同样的情况也会发生。

有人知道嵌入失败的原因吗？