Type 'Observable<boolean>' is not assignable to type 'Observable<UserRegistration>'

Question

register(email: string, password: string, firstName: string, lastName: string,location: string): Observable<UserRegistration> {
    let body = JSON.stringify({ email, password, firstName, lastName,location });
    let headers = new Headers({ 'Content-Type': 'application/json' });
    let options = new RequestOptions({ headers: headers });

    return this.http.post(this.baseUrl + "/accounts", body, options)
      .map(res => true)
      .catch(this.handleError);
  }

I found this code online, and i'm trying to implement it in my own project, but i keep getting the follow error:

Type 'Observable<boolean>' is not assignable to type 'Observable<UserRegistration>'.
  Type 'boolean' is not assignable to type 'UserRegistration'.

it also uses this class:

export interface UserRegistration {
  email: string;
  password: string;
  firstName: string;
  lastName:  string;
  location: string;
}

Answer 1

As your method shows , you are returning a boolean true , while your definition says it should return Observable<UserRegistration>. Change your method return type as,

register(email: string, password: string, firstName: string, lastName: string,location: string): Observable<boolean>

However your logic does not seem to be right as it always going to return true.