What is the solution to the error message stating that the property 'pipe' is not found on the OperatorFunction type?

I implemented the code based on RxJS 6 documentation while working with angular 5, RxJS 6 and angularfire2 rc.10. However, I encountered the following error:

[ts] property 'pipe' does not exist on type 'OperatorFunction<{}, [{}, user, string]>'.

Here is the code snippet:

this.companies$ = combineLatest(this.authService.user$, this.filter$).pipe(
  switchMap(([user, filter]) =>
    this.afs.collection("companies", ref => {
        if (user) {
          ref.where("owner.network", "==", user.activeNetworkProfile.id);
        }
        if (user) {
          ref.where("name", "==", filter);
        }
        return ref;
      }).valueChanges()
  )
);

Both this.authService.user$ and this.filter$ are observables.

public filter$: Observable<string>;
public user$ : Observable<User>;

Answer №1

It appears that there may be an issue with your import statements based on the error message you received.

In RxJS6, there are two different versions of the combineLatest function:

  • The pipeable operator:
    import {combineLatest} from 'rxjs/operators'
  • The creation method:
    import { combineLatest } from 'rxjs'

If you are using the creation method, make sure to import it from 'rxjs' and not from 'rxjs/operators'.

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