看视频发现是不是少了两步

protected $with = ['owner', 'favorites'];

以及Favoritable.php当中定义了

public function getFavoritesCountAttribute()
{
    return $this->favorites->count();
}

所以在Thread.php当中对关联关系replies进行修改

public function replies()
{
    return $this->hasMany(Reply::class);
}

protected $with = ['creator', 'channel'];

所以ThreadController.php里对getThreads方法去掉with

$threads = Thread::latest()->filter($filters);