Chain of observables with conditions

Question

So I have 3 observables: updateCustomUserData$, updateEmail$, updatePassword$. And profileEditForm. I need to update profile data if appropriate fields of form was changed; I think it should look like this:

updateCustomUserData$(data) {
  return iif(() => customDataWasChanged(), apiService.updateCustomUserData())
}

// updateEmail$ and updatePassword$ is similar


onSubmit() {
  this.updateCustomUserData$(formData).pipe(
    concatMap(() => this.updateEmail$(newEmail))),
    concatMap(() => this.updatePassword$(newPassword),
  )
  .subscribe(() => doSomething())
}

But it is not working. If custom data was not changed and password or email do - updateEmail & updatePassword is not executing. Is anybody can help? P.S. Sorry for my English:)

1. The `iif` operator isn't returned. 2. The condition in the `iif` is empty. — ruth, Aug 16 '20 at 08:59
1. I was forget return iif in there, but not in my code. 2. customDataWasChanged() return boolean. This is condition — Eduard Virchenko, Aug 16 '20 at 09:09

score 0 · Answer 1 · answered Aug 16 '20 at 09:20

0

When onSubmit method is called?
I think you should define ngOnInit instead of onSubmit.

export class AppComponent implements OnInit {
  ngOnInit() {
    this.updateCustomUserData$(formData).pipe(
      concatMap(() => this.updateEmail$(newEmail))),
      concatMap(() => this.updatePassword$(newPassword),
    )
    .subscribe(() => doSomething())  }
}

answered Aug 16 '20 at 09:20

S.Hashiba

615
7
15

onSubmit is called with the Submit button click – Eduard Virchenko Aug 16 '20 at 09:30

Chain of observables with conditions

1 Answers1