I'm struggling to get my head around observables in Angular2. I have a 2 subscriptions to an observable within an observeable forEach.

So it's as follows:

1. forEach gets the route ID (poll id)
2. (Nested in 1) subscribe gets the poll from the database using the route
ID (poll id)
3. (Nested in 2) subscribe gets the createdBy user from the database using
the poll ids createdById

As you can see there's a lot of nesting going on which just doesn't feel right. Is there a better way for me to achieve this? 

This is my code:

```
poll: Poll;
createdBy: string;

constructor(public route: ActivatedRoute, public teamPollsService: TeamPollsService) { }

ngOnInit(): void {
let id: any;

// 1. 
this.route.params.forEach((params: Params) => {
  id = params['id'];

  // 2.
  this.pollService.getPoll(id).subscribe((x) => {
      this.poll = x;

      // 3.
      this.users.getDbUser(x.createdById).subscribe((user) => {
        createdBy = `${user.firstName} ${user.lastName}`;
      });
    });
});

```

Thanks.