Reference.push 失败:第一个参数在属性“confirm.orderTotal"中包含未定义 [英] Reference.push failed: first argument contains undefined in property 'confirm.orderTotal'

问题描述

我在确认 Ionic 3 application 的待付款时遇到问题.

每当我按下按钮 "Paid", 它都会产生这个 error, "Reference.push failed: 第一个参数包含未定义的属性'confirm.orderTotal'..." 如果我点击 按钮，我的意图是把我的待处理订单带到 Firebase 中的确认 table.代码>

谁能帮我解决这个错误?谢谢！

我的 Firebase 数据

我的打字稿编码

导出类 CashierconfirmPage {导航:任何；ConfirmItem = {} 作为 orderItem；confirmItemRef$: FirebaseListObservable<orderItem[]>orderItemRef$: FirebaseListObservable<any>构造函数(公共cart_data:CartData，公共navCtrl:NavController，公共导航参数:导航参数，私有数据库:AngularFireDatabase，){this.orderItemRef$ = this.database.list('pendingorders');this.confirmItemRef$ = this.database.list('confirm');}addConfirmItem(confirmItem: orderItem){this.confirmItemRef$.push({//Ordermenu: this.cart_data.getCart(),orderTotal: this.confirmItem.orderTotal,订单号:this.confirmItem.orderNumber});}}

我的 HTML

<ion-navbar><ion-title>待付款订单</ion-title></离子导航栏>

 <h2>订购商品:</h2><li><ul *ngFor="let ordermenu of item.Ordermenu">{{ordermenu.itemName}}</ul></li>
<input type="text" ngDefaultControl [(ngModel)]="confirmItem.orderNumber" placeholder="{{item.orderNumber}}"></div>
<input type="text" ngDefaultControl [(ngModel)]="confirmItem.orderTotal" placeholder="{{item.orderTotal}}"></div><button(click)="addConfirmItem(confirmItem)" ion-button清除小图标-right color="dark">有薪酬的</按钮></离子项目>

解决方案

您好，我的英语可能不正确，我来自巴西，正在使用谷歌翻译，抱歉."

关于你的问题，我也遇到了同样的问题，我能够解决它.Firebase 不接受 undefined 和 yes null 作为空形式.您应该添加|| null".

例如:

addConfirmItem(confirmItem: orderItem){this.confirmItemRef$.push({//Ordermenu: this.cart_data.getCart(),orderTotal: this.confirmItem.orderTotal ||空值，orderNumber: this.confirmItem.orderNumber ||空值});}

我希望我已经帮助并且也帮助了遇到同样问题的其他人.拥抱！

I am having problems with confirming the pending payment of my Ionic 3 application.

Whenever i push my button "Paid", it produce this error, "Reference.push failed: first argument contains undefined in property 'confirm.orderTotal'..." my intention is to bring my pending orders to the confirm table in my Firebase if I clicked on the button.

Can anyone help me with this error? Thanks!

My Firebase Data

My typescript coding

export class CashierconfirmPage {
  nav: any;

  confirmItem = {} as orderItem;
  confirmItemRef$: FirebaseListObservable<orderItem[]>

  orderItemRef$: FirebaseListObservable<any>

    constructor(public cart_data: CartData, public navCtrl: NavController, 
      public navParams: NavParams,
      private database: AngularFireDatabase,) {

      this.orderItemRef$ = this.database.list('pendingorders');

      this.confirmItemRef$ = this.database.list('confirm');
    }

    addConfirmItem(confirmItem: orderItem){

      this.confirmItemRef$.push({
        // Ordermenu: this.cart_data.getCart(),
        orderTotal: this.confirmItem.orderTotal,
        orderNumber: this.confirmItem.orderNumber
      }); 
          }

}

My HTML

<ion-navbar>
    <ion-title>Pending payment orders</ion-title>
</ion-navbar>

    <h2>Ordered Items:</h2>
    <li>
        <ul *ngFor="let ordermenu of item.Ordermenu">{{ordermenu.itemName}}</ul>
    </li>

    <div>
        <input type="text" ngDefaultControl [(ngModel)]="confirmItem.orderNumber" placeholder="{{item.orderNumber}}">
    </div>

    <div>
        <input type="text" ngDefaultControl [(ngModel)]="confirmItem.orderTotal" placeholder="{{item.orderTotal}}">
    </div>

    <button (click)="addConfirmItem(confirmItem)" ion-button clear small icon-right color="dark">
        Paid
    </button>

</ion-item>

解决方案

"Hello, my English may not be correct, I'm from Brazil and I'm using Goolgle translator, sorry."

About your problem, I was facing the same, and I was able to solve it. The Firebase does not accept undefined and yes null as empty form. You should add "|| null".

Ex:

addConfirmItem(confirmItem: orderItem){
  this.confirmItemRef$.push({
    // Ordermenu: this.cart_data.getCart(),
    orderTotal: this.confirmItem.orderTotal || null,
    orderNumber: this.confirmItem.orderNumber || null
  }); 
}

I hope I have helped and also help other people who go through this same problem. Hugs!

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