public function lastReply()
    {
        try {
            $replies = ForumReply::where('post_id', $this->id)->get();

            if ($replies->isEmpty()) {
                return null;
            }

            $reply = $replies->last();

            return [
                'author' => $reply->author->name,
                'date' => $reply->created_at
            ];
        } catch (Exception $e) {
            return null;
        }
    }