Exploring Angular2 Heroes Guide - Declaring Hero Properties with Nested Objects

Currently, I am diving into the Angular2 Tour of Heroes guide and striving to grasp the concept of services. So far, I've successfully implemented the basic tutorial, but as I attempt to add more complexity, my application crashes without clear reasons.

The initial model that functions properly comprises a mock-heroes object along with a hero.ts file defining the structure of each entity.

You can find the specific Tour of Heroes Tutorial I am following here: https://angular.io/docs/ts/latest/tutorial/toh-pt4.html

hero.ts file:

export class Hero {
    id: number;
    firstName: string;
    lastName: string;
    street: string;
    suite: string;
    city: string;
    state: string;
    zipcode: string;
}

mock-hero.ts file:

import { Hero } from './hero';

// HEROES array storing mock data
export const HEROES: Hero[] = 
[
    {
        "id": 101, 
        "firstName": "John",
        "lastName": "Doe",
        "street": "111 Main Street",
        "suite": "Apt. 111",
        "city": "Anytown",
        "state": "US",
        "zipcode": "55555-0000"
    }
]

When attempting to introduce a nested object like 'accounts', I encounter the following error message:

Object literal may only specify known properties, and 'accounts' does not exist in type 'Hero'.

hero.ts file (updated):

export class Hero {
    id: number;
    firstName: string;
    lastName: string;
    street: string;
    suite: string;
    city: string;
    state: string;
    zipcode: string;
    accounts: ????;
    accountNum: string;
    accountName: string;
    type: string;
    availBalance: number
}

mock-hero.ts file:

import { Hero } from './hero';

// HEROES array now includes an 'accounts' nested within the main object
export const HEROES: Hero[] = 
[
    {
        "id": 101, 
        "firstName": "John",
        "lastName": "Doe",
        "street": "111 Main Street",
        "suite": "Apt. 111",
        "city": "Anytown",
        "state": "US",
        "zipcode": "55555-0000",
        "accounts": [ 
            {
                accountNum: "012345678",
                accountName: "Personal Checking",
                type: "checking",
                availBalance: 1000.00
            }
        ]
    }
]

I understand the need to define "accounts", but I'm uncertain about how to categorize it to correctly nest objects.

Thank you for any assistance provided.

Answer №1

interface UserAccount {
    accountNumber: string;
    accountHolderName: string;
    accountType: string;
    availableBalance: number;
}

class Superhero {
    superheroId: number;
    firstName: string;
    lastName: string;
    streetAddress: string;
    suiteNumber: string;
    city: string;
    state: string;
    zipCode: string;
    userAccounts: Array<UserAccount>;
}

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