ios - Realm Object 字段在展开 Optional 值时为零

Question

我对Realm. 当我第一次从 Realm 数据库中获取对象并从数据库中删除对象时。展开可选值nil。

模型：

class Outlet: Object {

    @objc dynamic var id:string = ""
    @objc dynamic var name:string = ""
    @objc dynamic var name1:Double = 0.0
    @objc dynamic var name2:Double = 0.0
    @objc dynamic var name3:Double = 0.0
    @objc dynamic var name4:Double = 0.0
    @objc dynamic var name5:Int = 0

    let  OutletListS = List<OutletList>()
    override class func primaryKey() -> String? {
        return "id"
    }
}

班级：

class DBManager {

    private var database: Realm

    static let sharedInstance = DBManager()

    private init() {
        database = try! Realm()
    }

    func getDataFromDB() -> Outlet {
        let result = database.objects(Outlet.self)
        return result.first!
    } 

}

和调用方法：

let selectedOutlet = DBManager.sharedInstance.getDataFromDB()

错误：

Printing description of result:
Results <0x7fb64f02c230> (

)

我自己无法解决。请帮帮我。