Observable <any> can't be assigned to Observable <Note>

Ionic Framework ionic-v3
1

Hello! I am working with the firebase databank and I want to get the information from it. The push operation works fine.

I have the following error:

Type ‘Observable<any[]>’ is not assignable to type ‘Observable<Note[]>’. Types of property ‘subscribe’ are incompatible. Type ‘{ (): Subscription; (observer: PartialObserver<any[]>): Subscription; (next?: (value: any[]) => v…’ is not assignable to type ‘Subscribe<Note[]>’. Type ‘Subscription’ is not assignable to type ‘Unsubscribe’. Type ‘Subscription’ provides no match for the signature ‘(): void’.

The weirdest thing about it is that when I save my code again and restart the application it works perfectly fine but still have the error message in my visual studio. The problem is at the line with “this.dataList$ = this.noteService…”. It says that a typ Observable can’t be assigned to Observable .

Home.ts File:

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { AddNotePage } from '../add-note/add-note';
import { NoteService } from '../../providers/note-service/note-service';
import { Note } from '../../models/note.model';
import { ViewNotePage } from '../view-note/view-note';
import { AngularFireList } from 'angularfire2/database';
import { AngularFireObject } from 'angularfire2/database';
import { Observable } from '@firebase/util';


@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  //private notes : Promise<Note[]>;
  //private note: Note;
  dataList$: Observable<Note[]>;
  //data: AngularFireObject<any>;
  constructor(public navCtrl: NavController, private noteService: NoteService) {
    this.dataList$ = this.noteService.getAllNotes().snapshotChanges().map( 
      changes => {
        return changes.map(c => ({
          key: c.payload.key, ...c.payload.val()
        }))
      })
  }

  ionViewWillEnter() {
    
    /**this.data = this.noteService.getAllNotes();
    console.log(this.data.valueChanges())
    console.log("rge3")*/
  }

  addNote() {
    this.navCtrl.push(AddNotePage);
  }
  getNote(createDate: number) {
    /** 
    this.noteService.getNote(createDate).then((n) => {
      this.note = n;
      this.navCtrl.push(ViewNotePage, { note: this.note })
    })
    */
  }
  
  getAllNotes() {
    return this.noteService.getAllNotes();
  }
  
}

note-service.ts File:

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Storage } from '@ionic/storage';
import { Note } from '../../models/note.model';
import { AngularFireDatabase } from 'angularfire2/database';

@Injectable()
export class NoteService {
  //private notes: Note[] = [];
  //private note: Note;
  private dataRef = this.fdb.list<Note>('/mydata/');
  constructor(public storage: Storage, private fdb: AngularFireDatabase) { 

  }

  saveNote(note: Note) {
    note.createDate = Date.now();
    //this.notes.push(note);
    //this.storage.set('notes', this.notes);
    this.dataRef.push(note);
  }

  getAllNotes() {
    console.log("gfvdf")
    return this.dataRef;
/** 
    return this.storage.get('notes').then(
    (notes) => {
      this.notes = notes == null ? [] : notes;
      return [...this.notes];
    })
    */

  }
  getNote(createDate: number) {
    /** 
    return this.storage.get('notes').then((notes) => {
      this.note = [...notes].find(r => r.createDate === createDate);
      return this.note;
    });
    */
    //return this.fdb.list('/mydata/');
  }
  /** 
  deleteNote(createDate: number) {
    this.notes = this.notes.filter((note) => {
      return note.createDate !== createDate
    });
    //this.storage.set('notes', this.notes);
  }*/
  
}

Thank you for the help!