Angular typescript pass service function

Question

I have two methods in my service which do very simillar things, so the subscribtion is the same. I wanted to join exection so when firing my service method

this.createNewUser(this.userModel, this.userDefaultGroupSelectedId)
            .subscribe(
            res => {
                this.msgs = ({ severity: "success", summary: "Success:\n", detail: res });
                this.userModel = new User();
                this.onConfirm.emit();
            },
            error => {
                this.msgs = ({ severity: "error", summary: "Error Message:", detail: error.Message ? error.Message : error.toString() });
            }

it would call createNewUser which shold return which function should be called

createNewUser(user: IUser, userDefaultGroupSelectedId: number): Observable<string> 
    {
        if (this.asRegistration == false) {
            return this.userAdministrationService.addNewUser(this.userModel, this.userDefaultGroupSelectedId);
        }
        else {
            this.userAdministrationService.registerNewUser(this.userModel);
        }
    }

but this approach does not work, I got Cannot read property 'subscribe' of undefined

my services:

addNewUser(user: IUser, userDefaultGroupSelectedId: number): Observable<string> {

    return this.http.post(this.addNewUserUrl)
        .catch(error => super.handleError(error))
        .map(response => response.json());
}

registerNewUser(user: IUser): Observable<string> 
{

    return this.http.post(this.registerNewUserUrl)
        .catch(error => super.handleError(error))
        .map(response => response.json());
}

apparently addNewUser or registerNewUser function returns undefined. — omeralper
– omeralper, Commented Oct 8, 2017 at 21:14
Show us your addNewUser and registerNewUser function implementations — Igor Soloydenko
– Igor Soloydenko, Commented Oct 8, 2017 at 21:18
Actually, @meligy has already answered your question. Somehow, the return keyword got lost in the else-clause before the function invocation. — Igor Soloydenko
– Igor Soloydenko, Commented Oct 9, 2017 at 16:48

Meligy · Accepted Answer · 2017-10-09 02:08:06Z

3

The problem seems to be that you are not returning the result of this.userAdministrationService.registerNewUser(this.userModel);, so the return of the function in this case is undefined.

Try changing it to:

return this.userAdministrationService.registerNewUser(this.userModel);

answered Oct 9, 2017 at 2:08

Meligy

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