The issue of login/sign up difficulties arises from the import of AngularFireDatabase in Angular

Code snippet for sidebar service file related to dashboard component:

constructor(private db: AngularFireDatabase) {}

  getUsers(): Observable<any[]> {
    return this.db.list('/users').valueChanges();
  }

Code snippet for dashboard component:

import { SidebarService } from './sidebar.service';

ngOnInit() {   
    this.fetchUsers();    
  }

 
 fetchUsers(): void {
    this.sidebarService.getUsers().subscribe(users => {
      this.users = users;
      this.filteredUsers = this.users;
    }, error => {
      console.error('Error fetching users:', error);
    });

Error encountered in developer tools:

ERROR NullInjectorError: NullInjectorError: No provider for InjectionToken angularfire2.app.options!

Upon login/signup, the page turns white with dev tools errors and fails to redirect to the dashboard component (the URL remains stuck at http://localhost:4200/login or http://localhost:4200/signup).

Answer №1

Consider modifying your approach to database access.

To resolve this issue, try importing Firestore from 'firebase/firestore' and utilize Firebase functions like collection or addDoc for performing database operations.

Cloud Firestore Documentation Reference 1

AngularFire

import { Firestore, collectionData, collection } from '@angular/fire/firestore';

@Injectable({
    providedIn: 'root'
})
export class SidebarService {
    private firestore: Firestore = inject(Firestore); // <- modification made here!

    constructor() {
    }

    getUsers(): Observable<any[]> {
        const itemCollection = collection(this.firestore, 'users');
        return collectionData<Item>(itemCollection);
    }
}

Reference Response

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