管道日期角度“无法转换"时间戳" [英] Pipe Date Angular "Unable to convert "Timestamp"

问题描述

我正在尝试使用有角度的管道，特别是以下内容:{{fechaCreacion | date: 'medium'}}，并且出现以下错误:Unable to convert Timestamp (seconds = 1528157765, nanoseconds = 878000000)" into a date 'for pipe' DatePipe'

I'm trying to use a pipe in angular, specifically the following: {{fechaCreacion | date: 'medium'}} and I get the following error: Unable to convert Timestamp (seconds = 1528157765, nanoseconds = 878000000)" into a date 'for pipe' DatePipe'

这是我在Firestore中的注册:

This is my registration in Firestore:

当我刚刚离开{{ fechaCreacion }}时，它向我显示以下内容:

When I just leave {{ fechaCreacion }} it shows me the following:

我该如何解决?

我正在使用:

角度6

"angularfire2":"^ 5.0.0-rc.10"

"angularfire2": "^5.0.0-rc.10"

"firebase":"^ 5.0.4"，

"firebase": "^5.0.4",

component.ts

component.ts

  aviso: any = {};
  id;
  titulo;
  descripcion;
  fechaCreacion;
  categoria;

  constructor( private fs: FirebaseService, private activatedRoute: ActivatedRoute) { }

  ngOnInit() {
    this.id = this.activatedRoute.snapshot.params['id'];
    this.fs.getAvisoObject(this.id).valueChanges().forEach(aviso => {
      this.titulo= aviso.titulo,
      this.descripcion = aviso.descripcion,
      this.fechaCreacion = aviso.fechaCreacion,
      this.categoria = aviso.categoria
    });
  }

component.html

component.html

<mat-card class="px-3 px-md-5 py-3 py-md-4 rounded">
    <div class="row no-gutters small pb-2 mb-3 d-flex justify-content-between border-bottom text-muted">
      <div>
        <span>{{ categoria }}</span>
      </div> 
      <div>
        <span>{{ fechaCreacion | date : 'medium' }}</span>
      </div>
    </div>
    <h2 class="font-weight-bold">{{ titulo }}</h2>
    <h5 class="font-weight-light">{{ descripcion }}</h5>
  </mat-card>

service.ts

service.ts

getAvisoObject(id: string) {
this.avisoObject = this.afs.doc('avisos/' + id);
return this.avisoObject;
}

推荐答案

在Firestore中处理时间戳记类型数据(即显示的文档中的fechaCreacion字段)时，Firestore客户端库将为您提供时间戳类型对象，以响应查询.您需要使用此时间戳来设置日期格式，以便在浏览器中显示.

When dealing with timestamp type data in Firestore (that's your fechaCreacion field in the document shown), the Firestore client libraries will give you a Timestamp type object in response to queries. You need to use this Timestamp to format a date for display in the browser.

时间戳表示具有纳秒精度的时间，其中涉及两个整数，您将在屏幕上看到它们.如果要使用JavaScript Date对象，则可以使用 toDate( )在该时间戳上进行转换，或将其转换为屏幕上的内容.

Timestamp represents times with nanosecond precision, which involves two integers, which you are seeing on screen. If you want a JavaScript Date object instead, you could use the toDate() method on that Timestamp to convert it, or whatever it is you need to render that on screen.

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