Problem to return a value from an AngularFireList

Question

I'm not able to get an object when I try to look for it through one of its attributes in an AngularFireList. What do you suggest?

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Service

import { Injectable } from '@angular/core';

import { AngularFireDatabase, AngularFireList } from 'angularfire2/database';

import { Prestamo } from '../models/prestamo';
import { FirebaseDatabase } from 'angularfire2';

@Injectable({
  providedIn: 'root'
})
export class PrestamoService {

  prestamoLista: AngularFireList<any>;
  prestamoSeleccionado: Prestamo = new Prestamo();

  constructor(private firebase: AngularFireDatabase) {}

  obtenerPrestamos()
  {
    return this.prestamoLista = this.firebase.list('prestamos');
  }

  obtenerPrestamo(codigo: string)
  {
    return this.prestamoLista = this.firebase.list('prestamos', ref => ref.orderByChild('codigo').equalTo(codigo));
  }
}

Sachila Ranawaka · Accepted Answer · 2018-12-14 14:05:51Z

1

Just return the snapshotChanges list from the service,

  obtenerPrestamos()
  {
    return this.firebase.list('prestamos').snapshotChanges();
  }

From component subscribe to the observable

this.yourService.obtenerPrestamos().subscribe((data) => {
   console.log(data)
})

answered Dec 14, 2018 at 14:05

Sachila Ranawaka

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1 Comment

Leonardo Over a year ago

Thanks for your answer @SachilaRanawaka ! But my problem is on the method obtenerPrestamo(codigo: string) , which it searchs through code atribute.

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