public function getComments()
    {
        $args_comments = [
            'post_id' => $this->ID,
            'orderby' => 'comment_date_gmt',
            'status' => static::STATUS_APPROVE,
        ];
        $comments = [];
        foreach (get_comments($args_comments, $this->ID) as $c) {
            $comments[] = Comment::find($c->comment_ID);
        }
        return $comments;
    }