laravel 模型追加字段并赋值

//追加字段
protected $appends = ['state'];
//赋值
public function getStateAttribute()
{
    $status = $this->attributes['status'];
    if ($status == 1) {
        return '已授权';
    } elseif ($status == 2) {
        return '取消授权';
    } else {
        return '未知';
    }
}