forkjoin returns no results

Question

I\'m using forkJoin to combine the results of two firebase requests

Both requests complete and log within the console, but the map function for the forkJoin itself does

Answer 1

This is my use case with Firestore.

 import { Observable } from 'rxjs/Observable';
 import { combineLatest } from 'rxjs/observable/combineLatest';

 constructor((){}

getAllBudgetGroups() {
    const loading = this.loadingProvider.presentLoader();
    try {
     this.budgetGroups$ = this.budgetGroupProvider.getAllTempBudgetGroups().valueChanges();
     this.defaultBudgetGroups$ = this.budgetGroupProvider.getDefaultBudgetGroups().valueChanges();
     combineLatest(this.budgetGroups$, this.defaultBudgetGroups$).subscribe(([res1, res2]) => {
        this.budgetGroupSortedList = concat(res1, res2);
        this.loadingProvider.dismissLoader(loading);
     }, err => {
        console.log(err);
        this.loadingProvider.dismissLoader(loading);
      });
    }
    catch (err) {
      console.log(err);
      this.loadingProvider.dismissLoader(loading);
    }
  }

Answer 2

It turns out forkJoin just doesn't work with firebase observables,

When I updated to

public initGroup(groupname, username){
  return Observable.combineLatest([
      this.getGroup(groupname, username),
      this.groupMembers(username, groupname)

  ])
    .map((data)=>{
      console.log(data)//This now logs
      this.group = data;
      return this.group
    })


}

combineLatest made it work as expected