Using from operator in Typescript is making my observable be a type of <void | object> when I just want it to be a type <object>

[WellSky-MaryWelch]

Here's my code snippet where I am trying to set up an observable by wrapping a promise in a from operator. I want to be able to create an Observable with type <AddressAutocompleteSuggestion[]> rather than <void | AddressAutocompleteSuggestion[]>. Is that possible?

  autocompleteAddress(addressSearchText: string): Observable<void | AddressAutocompleteSuggestion[]> {
    const clientBuilder = new _.core.ClientBuilder(this.credentials).withLicenses(["us-autocomplete-pro-cloud"]);
    const client = clientBuilder.buildUsAutocompleteProClient();

    let lookup = new Lookup(addressSearchText);
    lookup.maxResults = 10;
		lookup.includeOnlyCities = [];
		lookup.includeOnlyStates = [];
		lookup.includeOnlyZIPCodes = [];
		lookup.excludeStates = [];
		lookup.preferCities = [];
		lookup.preferStates = [];
		lookup.preferZIPCodes = [];

    const autocompleteObservable: Observable<void | AddressAutocompleteSuggestion[]> = from(
      client.send(lookup)
        .then((response: Lookup) => {
          return response.result.map((suggestion: Suggestion) => this.convertSuggestionToAddressAutocompleteSuggestion(suggestion));
        })
        .catch(err => console.error(err))
    )

    return autocompleteObservable;
  }

  private convertSuggestionToAddressAutocompleteSuggestion(suggestion: Suggestion): AddressAutocompleteSuggestion{
    return {
      streetLine: suggestion.streetLine,
      secondary: suggestion.secondary,
      city: suggestion.city,
      state: suggestion.state,
      zipcode: suggestion.zipcode,
      entries: suggestion.entries,
      fullAddress: this.buildAddress(suggestion)
    } as AddressAutocompleteSuggestion;
  }

[cartant]

This isn't an RxJS problem. It's an issue with the promise chain that you've composed. You have two branches: a then that resolves with the array of suggestions; and a catch that resolves with void - 'cause that's the result of the console.log call.

Either:

• remove the catch;
• rethrow the error after the console.log call within the catch;
• or return an array from within the catch - after the console.log call.

[WellSky-MaryWelch]

Good feedback, thank you. I will try these options instead.