Nsryjdtyk

Introduction to the problem
Here is my newcomp.component.ts file from Angular 4 project. I created the project using Angular CLI so it is well organized. My app name is cvfy. So the folder and file structure is as follows:
CVFY

-e2e (folder)

-node_modules (folder)

-server (folder)

-src (folder)

--environments (folder)

--assets (folder)

--app (folder)

---app.component.css (file)

---app.component.html (file)

---app.component.spec.ts (file)

---app.component.ts (file)

---app.module.ts (file)

---clientlogos.ts (file)

---imageclass.ts (file)

---clientscomp (folder)

----clientscomp.component.html (file)

----clientscomp.component.spec.ts (file)

----clientscomp.component.ts (file)

I have mentioned the important files and folders above for my problem
I am writing my code in clientscomp.component.ts file and using classes clientlogos.ts and imageclass.ts

clientscomp.component.ts

import { Component, OnInit } from '@angular/core';

import { Clientlogos } from "./../clientlogos";

import { Imageclass } from "./../imageclass";



@Component({

  selector: 'app-clientscomp',

  templateUrl: './clientscomp.component.html',

  styleUrls: ['./clientscomp.component.css']

})



export class ClientscompComponent implements OnInit {



  private imageone: Imageclass = [

    {"_id":"1", "altClient":"Play Station", "srcClient":"https://cdn3.iconfinder.com/data/icons/flat-icons-web/40/PlayStation-128.png"},

    {"_id":"2", "altClient":"Twitter", "srcClient":"https://cdn1.iconfinder.com/data/icons/flat-and-simple-part-1/128/twitter-128.png"}

  ];



  private myrows: Clientlogos = [

    {

      "_id":"1",

      "imagenew": this.imageone

    }

  ];



  constructor() { }



  ngOnInit() {

  }



}

clientlogos.ts

import { Imageclass } from "./imageclass";



export class Clientlogos {

    "_id":string;

    "imagenew":Imageclass;

}

imageclass.ts

export class Imageclass {

    "_id": string;

    "altClient": string;

    "srcClient": string;

}

The error it shows on running the application is:

Failed to compile.



C:/Users/Dell/Desktop/Learning/cvfy/src/app/clientscomp/clientscomp.component.ts (40,7): Type '{ "_id": string; "imagenew": Imageclass; }' is not assignable to type 'Clientlogos'.

  Type '{ "_id": string; "imagenew": Imageclass; }' is not assignable to type 'Clientlogos'.

    Object literal may only specify known properties, and '"imagenew"' does not exist in type 'Clientlogos'.

You can use Array in you class, to make it more statically typed.

class Menu {

  name: string;

  categories: Array<Category>; // initialize it as applicable

}

class Category {

  name: string;

  dishes: Array<Dish>;// initialize it as applicable

}

class Dish {

  name: string;

}

Component

You can try fill this.menus which will also be strongly typed Array // make sure the code is written to compile.

getMenus() {

    this.globals.getMenus().subscribe(

      data => {

        this.menus = new Array<Menu>();

        Object.keys(data).forEach(name => {

          //Initialize and push items as per data structure. 

          this.menus.push(new Menu(data[name]));

        });



        console.log(this.menus);

      },

      err => { console.log(err) }

    );

  }

template Arrange the following as a combination of Un-ordered and ordered list.

<ul>

    <li *ngFor="let menu of menus">

        {{ menu.name }}

        <ul>

            <li *ngFor="let category of menu.categories">

                {{ category.name }}

                <ul>

                    <li *ngFor="let dish of category.dishes">

                        {{ dish.name }}

                    </li>

                </ul>

            </li>

        </ul>

    </li>

</ul>