A reflective key error has occurred because the token was not properly defined!

My current setup includes Angular version 2.4.4.

However, I encountered an issue when trying to declare a service resolver and register it in both the component module and router.

import { Injectable } from '@angular/core';
import { Resolve, ActivatedRouteSnapshot } from '@angular/router';
import { Observable } from 'rxjs/Rx';
import { PGService, PG} from '../pg/';

@Injectable()
export class HomeServiceResolver implements Resolve<any> {
    constructor(
        private pgService: PGService
    ) { }

    resolve(route: ActivatedRouteSnapshot): Observable<PG> {
        return Observable.from([new PG()]);
    }
}

This error message is displayed:

vendor.dll.js:73630 Error: Uncaught (in promise): Error: Token must be defined!
Error: Token must be defined!
...

What could be causing this issue?

Answer №1

Encountered a similar problem. The key might be to ensure that the resolver service class is placed in close proximity to the component. Once I did this, everything started functioning as expected.

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