[Resolve] async ResolvePolicy "RXWAIT" does not behave as expected

[christopherthielen]

This issue moved from: angular-ui/ui-router#3066

When returning an errored observable from a resolve factory the state transition never happens (state home.observable-that-throws). Furthermore, the items that are emitted after the first item don't seem to be passed on to the stream that is resolved (home.observable).

Plunker: http://plnkr.co/edit/x2mTrhH3RQuNV4fcXSrO?p=preview
Expected: http://plnkr.co/edit/MXMAAWLDD6jGUz99SDlG?p=preview

[jspizziri]

☹️

[killersite]

So just to be clear - using Observables in resolves are not working yet?

Can you describe the best way to use observables now?
will using the operator toPromise() work when I want to wait for a single value?

[Klaster1]

@killersite if you need a single value, then toPromise will be perfectly fine. When you need multiple values, you can arrange two (or more) resolves: one eagerly passes an Observable to component binding (you'll have to subscribe inside component) and another resolve that waits for first value of the first Observable via toPromise.

[atdiff]

Curious if there is any update on this issue

[wawyed]

fixed in https://github.com/ui-router/angular/blob/master/CHANGELOG.md#500-2019-10-02