class UserModel extends Model {
  protected $table = 'user';
  public $timestamps = false;
  
  public function userOption()
  {
    return $this->hasOne(UserOptionModel::class , 'user_id' , 'id');
  }
  
  public function findById(int $user_id)
  {
    $res = self::with(['user_option'])
      ->find($user_id);
    return $res;
  }
}

class UserOptionModel extends Model {
  protected $table = 'user_option';
  public $timestamps = false;
}

class UserCache {
  // 获取用户信息
  public static function findById(int $user_id)
  {
    // 获取缓存数据
    $user = Redis::string('user_' . $user_id);
    if (!empty($user)) {
      return $user;
    }
    $res = UserModel::findById($user_id);
    Redis::string('user_' . $user_id , $res);
    return $res;
  }
}