如何获取firestore时间戳
问题描述:
我正在尝试获取我在 firestore 中创建的文档的时间戳,但我得到的是:
I'm trying to get the timestamp of a document that I created in firestore, but what I get is this:
myService.ts
getDomiciliarios() {
this.domiciliarios = this.afs.collection('domiciliarios').snapshotChanges().map(actions => {
return actions.map(a => {
const data = a.payload.doc.data() as Domiciliario;
const id = a.payload.doc.id;
const date = firebase.firestore.FieldValue.serverTimestamp();
return { id, ...data, date };
});
});
return this.domiciliarios;
}
myComponent.ts
ngOnInit() {
const domiciliarios = this.fs.getDomiciliarios()
.subscribe(data => this.dataSource.data = data, date => date);
}
myComponent.html
<ng-container matColumnDef="fecha">
<mat-header-cell *matHeaderCellDef mat-sort-header> Fecha </mat-header-cell>
<mat-cell *matCellDef="let domiciliario"> {{ domiciliario.date }} </mat-cell>
</ng-container>
我应该如何打印该时间戳,之前是否应该创建它?
How can I print that timestamp, should I have previously created it?
答
如果你想要 firebase.firestore.FieldValue.serverTimestamp()
的日期值,你可以使用 .toDate()代码>.请参阅 FireStore 时间戳.在您的情况下,它将是您模板中的
domiciliario.date.toDate()
.
IF you want the date value of firebase.firestore.FieldValue.serverTimestamp()
you can use .toDate()
.
See FireStore Timesteamp. In your case it will be domiciliario.date.toDate()
in your template.