Can't read url as JSON data - html

Question

I have this JSON data and I'm getting it's output to a html file using angular. I use a service to get JSON data and a component to create the template. After using the template, I'm getting only id value and name value, but not url value.
JSON:
{
"A":1,
"B":[
{
"id":1,
"name":"One",
"url":"http://myapp/rootpath/first"
},
{
"id":2,
"name":"two",
"url":"http://myapp/rootpath/second"
}
]
}
I'm taking the JSON data to postArray variable in the component and pass it to the html file.
search.service.ts:
import { Injectable } from '#angular/core';
import {Http,Response} from "#angular/http";
import { Observable } from "rxjs";
import "rxjs/Rx";
import {JsoncallItem} from "./jsoncall-item";
#Injectable({
providedIn: 'root'
})
export class ApiService {
private postsURL ="http://myapp/items";
constructor(private http: Http ) {}
getPosts(): Observable<JsoncallItem[]>{
return this.http
.get(this.postsURL)
.map((response: Response)=> {
return <JsoncallItem[]>response.json();
})
.catch(this.handleError);
}
private handleError(error: Response) {
return Observable.throw(error.statusText);
}
}
search.component.ts
import { Component, OnInit } from '#angular/core';
import { ApiService } from "./../search.service";
import { JsoncallItem } from "./../jsoncall-item";
import { error } from 'util';
import { SearchtermPipe } from './../searchterm.pipe';
#Component({
selector: 'app-search',
templateUrl: './search.component.html',
styleUrls: ['./search.component.css']
})
export class SearchComponent implements OnInit {
title = 'app';
_postsArray: JsoncallItem[];
constructor(private apiSerivce: ApiService){}
getPosts(): void {
this.apiSerivce.getPosts().
subscribe(
resultArray => this._postsArray = resultArray
)
//error => console.log("Error :: " + error ))
}
ngOnInit(): void{
this.getPosts();
}
}
search.component.html:
<div class="container">
<ul>
<li *ngFor="let post of _postsArray | searchterm: value">
{{post.id}}, {{post.name}}, {{post.url}}
<hr>
</li>
</ul>
</div>
Output shows the id and name of each data, but not showing the url. What could be the wrong here?