Angular 4 data-table sorting from nested json

Require help on Angular data-table with nested data.

I want to sort the data in table.

I am using data table from - https://www.npmjs.com/package/angular2-datatable

Data table works fine for single array type data. (used for many angular applications)

ISSUE: i have nested json (in reality, i have complex json, making here simple)

Thanks for looking into this.

Any suggestions or help is appreciated.

JSON

records = [
  [
    {
      "name": "Subject Name",
      "type": "text",
      "id": "subjectName",
      "value": "DavidJ",
      "firstName": "David",
      "lastName": "John"
    },
    {
      "name": "QC Name",
      "type": "hidden",
      "id": "qcName",
      "value": "JosephT",
      "firstName": "Joseph",
      "lastName": "Tom"
    }
  ],
  [
    {
      "name": "Subject Name",
      "type": "text",
      "id": "subjectName",
      "value": "TigerC",
      "firstName": "Tiger",
      "lastName": "Chan"
    },
    {
      "name": "QC Name",
      "type": "hidden",
      "id": "qcName",
      "value": "ThomasR",
      "firstName": "Thomas",
      "lastName": "Richard"
    }
  ]
]

HTML

<table class="table table-responsive table-hover" [mfData]="this.records | dataFilter : filterQuery" #mf="mfDataTable" [mfRowsOnPage]="rowsOnPage" [(mfSortBy)]="sortBy" [(mfSortOrder)]="sortOrder">
<thead>
   <tr>
      <th>#</th>
      <th>
         <mfDefaultSorter by="subjectName">subject Name</mfDefaultSorter>
      </th>
      <th>
         <mfDefaultSorter by="qcPerson">QC Person</mfDefaultSorter>
      </th>
   </tr>
</thead>
<tbody *ngIf="!isLoading">
   <tr class="border" *ngFor="let sample of mf.data; let i='index'">
      <td></td>
      <ng-container *ngFor="let item of sample">
         <td *ngIf="item.id ==='subjectName'">
             
         </td>
         <td *ngIf="item.id ==='qcPerson'">
             
         </td>
      </ng-container>
   </tr>
</tbody>
</table>

TYpescript file

import { Component, OnInit } from '@angular/core';
import { OrderBy } from '../all_services/OrderByPipe';

@Component({
    selector: 'app-userdashboard',
    templateUrl: './userdashboard.component.html',
    styleUrls: ['../header-footer/css/external.style.css']
})

export class UserdashboardComponent implements OnInit {

    constructor() {}

    ngOnInit() {}


    /** Sorting functions */
    public data;
    public filterQuery = "";
    public rowsOnPage = 10;
    public sortBy = "subjectName";
    public sortOrder = "asc";

    public toInt(num: string) {
        return +num;
    }
}

Datafilterpipe.ts

import * as _ from "lodash";
import {Pipe, PipeTransform} from "@angular/core";

@Pipe({
    name: "dataFilter"
})
export class DataFilterPipe implements PipeTransform {

    transform(array: any[], query: string): any {
        if (query) {
            return _.filter(array, row=>row.name.indexOf(query) > -1);
        }
        return array;
    }
}

from Angular 4 data-table sorting from nested json