RXWAIT observable$.cache is not a function

[mkoczorowski]

.cache is deprecated now. We should change this to .share() or publish().refCount(1)

[mkoczorowski]

I can fix this, if Im able to do a pull

[plcart]

Please consider this change as your next RC

[claudiuconstantin]

Any workaround for this?

[plcart]

get the operator/cache.(js|d.ts|map) file from "rxjs": "5.0.0-beta.12" and add to your app or to node_modules/rxjs/operator/ & node_modules/rxjs/add/operator/

[christopherthielen]

RXWAIT is not really working properly even with .cache(). I think the ui-router team needs need to take a step back and re-evaluate how to implement RXWAIT

[dam1ann]

I used policy: { async: "RXWAIT" } in state resolving

Console shows:
stateService.js:41 Transition Rejection($id: 0 type: 6, message: The transition errored, detail: TypeError: observable$.cache is not a function)

How to resolve this problem? Its necessary to change node_modules folder?

[plcart]

Create a file with this content
`import { Observable } from 'rxjs/Observable';
import { Scheduler } from 'rxjs/Scheduler';
import { ReplaySubject } from 'rxjs/ReplaySubject';
import { Observer } from 'rxjs/Observer';
import { Subscription } from 'rxjs/Subscription';

export function cache(
bufferSize: number = Number.POSITIVE_INFINITY,
windowTime: number = Number.POSITIVE_INFINITY,
scheduler?: Scheduler): Observable {
let subject: ReplaySubject;
let source = this;
let refs = 0;
let outerSub: Subscription;

const getSubject = () => {
	subject = new ReplaySubject<T>(bufferSize, windowTime, scheduler);
	return subject;
};

return new Observable<T>((observer: Observer<T>) => {
	if (!subject) {
		subject = getSubject();
		outerSub = source.subscribe(
			(value: T) => subject.next(value),
			(err: any) => {
				let s = subject;
				subject = null;
				s.error(err);
			},
			() => subject.complete()
		);
	}

	refs++;

	if (!subject) {
		subject = getSubject();
	}
	let innerSub = subject.subscribe(observer);

	return () => {
		refs--;
		if (innerSub) {
			innerSub.unsubscribe();
		}
		if (refs === 0) {
			outerSub.unsubscribe();
		}
	};
});

}

export interface CacheSignature {
(bufferSize?: number, windowTime?: number, scheduler?: Scheduler): Observable;
}`

at some main location in your app

`import { cache, CacheSignature } from '../services/cache';

Observable.prototype.cache = cache;

declare module 'rxjs/Observable' {
interface Observable {
cache: CacheSignature;
}
}`

[kuhnroyal]

This is somewhat of a blocker, I think .shareReplay() could potentially solve this problem.
It is available in rxjs 5.4.0+

ReactiveX/rxjs#2443
https://github.com/ReactiveX/rxjs/blob/892700dd4f5d5e5f9ae9276ede32208f4390c5e9/CHANGELOG.md#540-2017-05-09

[mkoczorowski]

this issue is in beta.10 milestone.. but rc was released after bata.9 ?

[kuhnroyal]

I tried to fix this in core but this is not possible, the rxjs typings/imports are needed to get this working.

I think the ResolvePolicy needs to become pluggable. Core should only provide WAIT and NOWAIT by default.
After this the whole RXWAIT can easily be implemented in the ng2/react module with the correct typings and plugged in.

At the moment I doubt anyone is using RXWAIT because it simply doesn't work with any recent version of angular and rxjs 5+.

So I propose RXWAIT gets dropped from core and implemented in ng2/react. Not sure how this can fit in the ng1 module.

@christopherthielen What do you think, is this possible?

Edit: I think the correct place to implement RXWAIT is actually @uirouter/rx.

[colmben]

Am I missing something or is this not a pretty major showstopper for an Angular 2+ router? Observables are all over the place in Angular now. Is the suggested workaround just to "toPromise" everything?

[colmben]

Also, its been around for nearly a year, can we take RXWAIT out of the docs?

[vincentdewisme]

Got the same error in my project:
TypeError: observable$.cache is not a function at waitForRx (resolvable.js:83)

Solved it by promisifying all my Observables...
So sad the other workaround creating the cache method on Observable did not work.

[Dgs-asohail4]

DEC 2018 still no workaround ?