我尝试将更改保存到Firebase数据库中的现有节点,但我在此处收到此错误:
Reference.update失败:第一个参数包含属性中的一个函数' matatu-list.-L-RMcqjnladFM5-V80b.payload.node_.children_.comparator _' with contents = function NAME_COMPARATOR(left,right){ return util_1.nameCompare(left,right); }
我想根据其各自的键(通过navParams
从另一页传递)来编辑项目。
这是我用来构建数据库的接口:
interface.ts
export interface Matatu {
$key?: string;
matNumberPlate: string;
matSacco: string;
matDriver: string;
matAccessCode: string;
matStatus: string;
matTracker: string;
matLocation: string;
//Optionals
payload?:any;
key?:any;
}
用于更新记录的.ts
和.html
代码:
.ts
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { AngularFireObject, AngularFireDatabase } from 'angularfire2/database';
import { Matatu } from '../../models/matatu/matatu.interface';
import { Subscription } from 'rxjs/Subscription';
@IonicPage()
@Component({
selector: 'page-edit-ma3',
templateUrl: 'edit-ma3.html',
})
export class EditMa3Page {
matatuRef$: AngularFireObject<Matatu>;
matatuAsync$: any;
matatu = {} as Matatu;
sub: Subscription;
constructor(public navCtrl: NavController, public navParams: NavParams, private database: AngularFireDatabase) {
const matKey = this.navParams.get('matKey');
this.matatuRef$ = this.database.object(`matatu-list/${matKey}`);
this.matatuAsync$ = this.matatuRef$.snapshotChanges();
//console.log(matKey);
this.sub = this.matatuAsync$.subscribe(
matatu => this.matatu = matatu
)
}
editMatatu(matatu : Matatu){
this.matatuRef$.update(matatu);
this.navCtrl.pop();
}
ionViewWillLeave(){
this.sub.unsubscribe();
}
}
.html
<ion-content>
<ion-list>
<ion-list-header>
Matatu Details
</ion-list-header>
<ion-item>
<ion-label>Sacco</ion-label>
<ion-input type="text" [(ngModel)]="matatu.matSacco"></ion-input>
</ion-item>
<ion-item>
<ion-label>Driver</ion-label>
<ion-input type="text" [(ngModel)]="matatu.matDriver"></ion-input>
</ion-item>
<ion-item>
<ion-label> Access Code</ion-label>
<ion-input type="password" [(ngModel)]="matatu.matAccessCode"></ion-input>
</ion-item>
</ion-list>
<ion-list radio-group [(ngModel)]="matatu.matTracker">
<ion-list-header>
Preferred Tracking
</ion-list-header>
<ion-item>
<ion-label>GPS</ion-label>
<ion-radio checked="true" value="GPS"></ion-radio>
</ion-item>
<ion-item>
<ion-label>Driver's Location</ion-label>
<ion-radio value="Driver's Location"></ion-radio>
</ion-item>
</ion-list>
<div padding>
<button ion-button block (click)="editMatatu(matatu)">Save Changes</button>
</div>
</ion-content>
我该怎么做才能纠正这个问题?如果向我指出我哪里出错了,以及其他方法可以做到这一点(即使是肮脏的那些!),我也会感激不尽。
答案 0 :(得分:1)
您可以在占位符变量中传递密钥,或者您可以像这样连接它:
this.matatuRef$ = this.database.object(`matatu-list/`+ matKey);
请记住,这不是一个好方法,但它会做到这一点。
当您尝试推送包含函数或数据类型而非数据值的数据时,Firebase会触发此错误。
根据您的界面以及您从模板传递的值,您的身份 更新方法应该是这样的:
editMatatu(matatu : Matatu){
this.matatuRef$.update({
matDriver: this.matatu.matDriver,
matAccessCode: this.matatu.matAccessCode,
matSacco: this.matatu.matSacco
});
}