I’m working on an Ionic 4 Project, where I want to display all the posts from the current user once the user log into the application. Currently, I’m using snapshotChanges()
and subscribe()
method (as shown below) to get the data from firestore. But it gives me every single data from the firestore document. Having the userID
and postID
references on both document, how can I get the value of author
and desc
from that specific user or is it possible? To be specific, how can I display user (6YbhQux2sgTH66F0cJpdcT87Pw83)
's post (54d039ec-5b3c-4ee9-95a0-418b06365f25)
that contains author
and desc
?
Firestore:
Here’s what I did:
getData.service.ts
import { Injectable } from '@angular/core';
import { AngularFirestore } from '@angular/fire/firestore';
@Injectable({
providedIn: 'root'
})
export class getData {
constructor(
private firestore: AngularFirestore
) { }
readData() {
return this.firestore.collection('promotions').snapshotChanges();
}
}
post.ts
import { AngularFirestore } from '@angular/fire/firestore';
@Component({
selector: 'app-post',
templateUrl: './post.page.html',
styleUrls: ['./post.page.scss'],
})
export class PostPage implements OnInit {
constructor(
private afs: AngularFirestore
){}
ngOnInit() {
this.getData.readData().subscribe(data => {
this.posts = data.map(e => {
return {
id: e.payload.doc.id,
Author: e.payload.doc.data()['author'],
Description: e.payload.doc.data()['desc'],
};
})
console.log(this.posts);
});
}
}
post.html
<ion-card no-padding *ngFor="let post of posts">
<ion-card-header>
<ion-card-title>{{post.Author}}</ion-card-title>
</ion-card-header>
<ion-card-content>
<p>{{ post.Description }}</p>
</ion-card-content>
</ion-card>
I also tried using afAuth.auth.currentUser
to get the current user id and the posts but it shows an error Property 'map' does not exist on type 'DocumentSnapshot'
. I am new to this and not sure how to proceed.
let user = this.afAuth.auth.currentUser;
uid = user.uid;
this.afs.firestore.collection('users').doc(uid).get()
.then(doc=>{
var a = doc.data().posts
console.log(a);
this.afs.firestore.collection('posts').doc()
.get().then(doc2=>{
this.promotions = doc2.map(e=>{
return {
id: e.payload.doc2.id,
Author: e.payload.doc2.data()['author'],
Description: e.payload.doc2.data()['desc'],
};
})
})
})
Can anyone help? Thanks.