Rate iPoo

a.js

  ratesRef: AngularFireList<any>
  rates: Observable<any[]>

  constructor ( db: AngularFireDatabase ) {
    this.ratesRef = db.list('bathrooms')
    // Use snapshotChanges().map() to store the key
    this.rates = this.ratesRef.snapshotChanges().map(changes => {
      return changes.map(c => ({ key: c.payload.key, ...c.payload.val() }))
    })
    alert(this.rates)
  } 

  getRates () {
    return this.rates
  }

  getRatesByBathroom (bathroomKey) {
    return this.rates.filter(rate => rate.bathroomKey === bathroomKey)
  }

  addRate (data) {
    this.ratesRef.push(data)
}