AngularFireList is not assignable to type 'Observable<Response>

Question

I have an Ionic page which is querying FirebaseListObservable to make dynamic searching on ion-searchbar. It works well with [email protected] and [email protected]. After upgrading new release AngularFire 5.0 I get an issue about FirabaseListObservable has no exported from new Api.

Then I changed the query with new api but I can not return response as an observable as you see below. Im getting error like this

**message: 'Type 'Observable[]>' is not assignable to type 'Observable'. Type 'AngularFireAction[]' is not assignable to type 'Response'. Property 'type' is missing in type 'AngularFireAction[]'.' **

import { Component } from '@angular/core';
import { IonicPage,  NavParams, ViewController } from 'ionic-angular';
import {AngularFireDatabase, AngularFireAction} from 'angularfire2/database';
import { Observable, BehaviorSubject} from 'rxjs';
import { Response } from '@angular/http';
/**
 * Generated class for the ModalGroupsPage page.
 *
 * See http://ionicframework.com/docs/components/#navigation for more info
 * on Ionic pages and navigation.
 */
@IonicPage()
@Component({
  selector: 'page-modal-groups',
  templateUrl: 'modal-groups.html',
})
export class ModalGroupsPage {

  

  items: Observable<AngularFireAction<firebase.database.DataSnapshot>[]>;
  group: BehaviorSubject<any>;

  constructor(public navParams: NavParams,
    public viewCtrl:ViewController,
    public afDatabase: AngularFireDatabase) {
  }

  

  getItems = (ev: any) : Observable<Response> =>  {
    this.group = new BehaviorSubject(ev);

    this.items = this.group.switchMap(name =>
    
      this.afDatabase.list('/Groups', ref => name ? ref.orderByChild('namelower').startAt(ev.target.value).endAt(ev.target.value + '\uf8ff') : ref
   
     ).snapshotChanges());
  

     return this.items;
  }

Answer 1

In order to get Observable<Response> from AngularFireList from 5.0 onwards, use valueChanges() function.

Check the change here.

return this.afDatabase.list('/Groups', {
       query:{
         orderByChild: 'namelower',
         startAt: (ev.target.value),
         endAt: (ev.target.value + '\uf8ff')
       }
      }
     ).valueChanges();

If you want to save an instance of this.afDatabase.list() in this.groups, it will be AngularFireList instead of FirebaseListObservable.