CODEWITHSUNDEEP
angulartypescriptionic-framework
laurentius
laurentius

Reputation: 1145

Injecting into existing constructor

I'm having some difficulties trying to inject a service into another in Angular. I'm trying to create a service by extending another class with an existing constructor, as follows:

@Injectable()
export class AuthHttpService extends AuthHttp {
    constructor(options: AuthConfig, http: Http, defOpts?: RequestOptions) {
        super(options, http, defOpts);
    }
}

My issue is: I need to inject another service into it and I can't seem to put it as argument in the constructor (can't put a required argument after an optional one and if I put it as optional with ? then it doesn't work).

I've tried with injector.get and it works reasonably well but it injects a different instance of the service than the other components and is breaking my app (I rely on some service properties to show information).

Any solution? Thanks!

Upvotes: 0

Views: 42

Answers (1)

DeborahK
DeborahK

Reputation: 60626

To inject another service, just add it to the constructor before the optional parameter. Then it will be fine.

@Injectable()
export class AuthHttpService extends AuthHttp {
    constructor(options: AuthConfig, http: Http, 
                otherservice: OtherService,
                defOpts?: RequestOptions) {
        super(options, http, defOpts);
    }
}

Upvotes: 1

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