“TypeError.parent.context.car.getBrands is not a function”: s

Question

Service:

@Injectable()
export class Service {

    constructor(private http: Http) { }

    getCars(){
        return this.http.get...       
    }

    getById         


        

Answer 1

I suppose the likely problem is located here:

 this._service.getById(id)
    .subscribe(car => {
      this.car = car; // you just init object like { id: '1', name: 'name'}
    });

Probably your service looks like this:

getById(id: string) {
   return this.http.get('app/car.json')
     .map(data => data.json());     
} 

Try to get Car model from service like this:

getById(id: string) {
   return this.http.get('app/car.json')
     .map(data => data.json())
     .map(car => new Car(car.id, car.name));  <== add this line   
}   

This way car will be instance of Car class and will have appropriate methods like getBrands, addBrand...

Hope it helps!