AngularFire2 typings: "Property 'take' does not exist on type 'FirebaseObjectObservable'"

Question

I've updated my ionic app from beta 11 to rc0. So it means I've switched from typescript 1.8 to 2.

I've configured AngularFire2 according to this site Getting Started with Ionic 2 RC0, Firebase 3 + AngularFire 2

I had this line of code working:

this.af.database.object(`comments/${commentId}`).take(1).subscribe({
    data => console.log(data)
});

But now getting this error

error TS2339: Property 'take' does not exist on type 'FirebaseObjectObservable'.

Any ideas on what's going on? How can I solve this?

Answer 1

For more recents versions of rxjs (v6) and angularfire (v5), the syntax I used is :

import { take } from 'rxjs/operators'

...

this.afAuth.authState.pipe(take(1)).subscribe(user => {
  ...
})

Answer 2

Posting user @codedesignr's answer from above so this question can have an official solution:

Import the rxjs take operator using: import 'rxjs/add/operator/take';

Answer 3

If your angular version is 6 and above.

use below:

import { take, map } from "rxjs/operators";

Install - npm install --save rxjs-compat

Also use pipe with other functions(Take, Map).

timer(0, 10) .pipe(take(1000)) .pipe(map(() => x));

Answer 4

this.auth.authState.pipe(take(1)).subscribe(user=>{

});