angular resolve with nested promise and observable

Question

I am using resolve with routing in one component but in resolve, one HTTP call is dependent on other Promise call.

resolve(){
  return this.storage.getUser().then( user => {
    this.getVendorDetails(user.login);
  });
}

getVendorDetails(loginId) {
  return this.http.get('http://localhost:8080/user/getVendor/' + loginId);
}

In component when I am trying to get the data from ActivatedRoute

ngOnInit() {
  this.activatedRoute.data.subscribe( data => {
    console.log(data);
  });
}

I am getting undefined. Maybe I'm missing something in the resolve function. How can I get the getVendorDetails() response into ngOnInit() using ActivatedRoute.

Poul Kruijt · Accepted Answer · 2019-07-22 10:18:53Z

4

Either make one an observabe, or the other one a promise and always return this:

resolve() {
  return this.storage.getUser().then(user => this.getVendorDetails(user.login).toPromise());
}

or

resolve() {
  return from(this.storage.getUser()).pipe(
    switchMap((user) => this.getVendorDetails(user.login))
  );
}

answered Jul 22, 2019 at 10:18

Poul Kruijt

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