如果 firebase 规则设置为 auth !=null，如何检索 AngularList

Question

My issue is that I do not know can I retrieve data from firabase using AngularFireList. If I set database rules as with data can be used only by authorized user:

{
  "rules": {
    ".read":  "auth !=null",  // 2021-1-28
    ".write": "auth !=null",  // 2021-1-28
  }
}

Of course my previous fetch logic dose not work, but I do not know how to tell firebase, that user is authorized. This is my service function:

constructor(
  private db: AngularFireDatabase,
  private authService: AuthService,
  public afAuth: AngularFireAuth) { 
  }

  getItems(){
    this.pacRef = this.db.list('pacients');
    this.pacientsData = this.pacRef.snapshotChanges().pipe(
      map(changes=> changes.map(a=>({
        key : a.payload.key, ...a.payload.val() 
        }))));  
    return this.pacientsData;
  }

And here I component where I am trying get data from firabase using gatItems(key) function.

  constructor(private router:Router, 
    private pacientService: PacientServiceService,
    private authService: AuthService) { 
  }

  ngOnInit(): void {

  this.userSub = this.authService.user.subscribe(user=>{
    this.isAuthenticated = !!user;
    this.userToken = user.token;
    console.log(this.isAuthenticated);
    if (this.isAuthenticated) {
      this.pacientService.getItems().subscribe(pacientsData=>{
        this.pacientsData = pacientsData;      
      });
    }
  });
  }

Picture from console: enter image description here Picture from authorization enter image description here

Authorization works and I am getting back token. Any help can help:) This only second month when I building something with Angular.

Answer 1

Given your security rules, you should only call getItems once the user is authenticated.

So:

  ngOnInit(): void {
    this.userSub = this.authService.user.subscribe(user=>{
      this.isAuthenticated = !!user;
      this.userToken = user.token;
      console.log(this.isAuthenticated);
      if (this.isAuthenticated) {
        this.pacientService.getItems(this.userToken).subscribe(pacientsData=>{
          this.pacientsData = pacientsData;      
        });
      }
    });
  }

I also think you don't need to pass the auth key yourself, as the Firebase SDKs handle that behind the scenes.