How to combine 3 firebase observables without losing dynamic updates

Question

I have a 3 parallel firebase requires. And I need to join them as 1 single object. Code as below:

import {Http} from \"@angular/http\";
import {AngularFireD         


        

Answer 1

Instead of .forkJoin(...) you could use .combineLatest(...).

I also did streamline your map a bit:

Observable.combineLatest(
  this.db.list('participant/' + uid + '/threads'),
  this.db.list('participant/' + uid + '/messages'),
  this.db.list('participant/' + uid + '/participants')
)
.map(([threads, messages, participants]: [Thread[], Message[], Participant[]]) =>
  ({ threads, messages, participants })
)