如何从firebase获取数组数据？

Question

我想从保存在数组中的Firebase中获取数据。如何获取“ productcarteditem”中“金额”中的数据？

export class ViewcartdetailsComponent implements OnInit {
  public alldetails: any;
  public id: string;
 // public replays: any;

  constructor(public acivatedroute: ActivatedRoute, public firestore: FirestoredatabaseService) {
    this.id = this.acivatedroute.snapshot.params['id'];
   }

  ngOnInit() {
    this.alldetails = this.firestore.detailscart(this.id).valueChanges();

  }

}

[<div class="row">
    <div class="col-md-6">


</div>
<div class="col-md-6"> {{(alldetails | async)?.productcarteditem.amount}} </div>

</div>]

1

Answer 1

分配一个变量并使用它

<div class="col-md-6"  *ngIf="alldetails | async; let item"> 
   {{item?.productcarteditem.amount}} </div> 
</div>