Sort table by column header in AngularJS

Question

There is an array of objects from which I get data to put in the table:

$ctrl.myArray = [
            {name: "name1", id: 1, children: ["one", "two"]},
            {name: "name2", id: 2, children: ["two"]},
            {name: "name3", id: 3, children: ["one", "two"]},
            {name: "name4", id: 4, children: ["one"]}
];

Putting the data in the table is working fine, the problem comes when I want to add the sorting functionality by columns.

In controller's constructor I added this:

this.orderByField = 'name';
this.reverseSort = false;

firstly I tried to add the sorting functionality only for the name column and this is the code:

<thead>
    <tr>
      <th>
        <a href="#" ng-click="orderByField='name'; reverseSort = !reverseSort">
            Name <span ng-show="orderByField == 'name'"><span ng-show="!reverseSort">^</span><span ng-show="reverseSort">v</span></span>
            </a>
      </th>
      <th>Id</th>
      <th>Children</th>
    </tr>
</thead>

<tbody>
    <tr ng-repeat="rows in $ctrl.myArray track by $index | orderBy:orderByField:reverseSort">
        <td>
            {{$ctrl.myArray[$index].name}}
        </td>
        <td>{{$ctrl.myArray[$index].id}}</td>
        <td><span ng-repeat="rows in $ctrl.myArray[$index].children track by $index">
            {{$ctrl.myArray[$parent.$index].children[$index]}}</span>
        </td>
    </tr>
</tbody>

This is the error message:

[orderBy:notarray] Expected array but received: 0

Don't know why the array is 0. Any ideas?

Answer 1

So, the issue is related to track by $index . You have misplaced it.

I have made the plunker for it. Below is the link:

https://plnkr.co/edit/mqA1ofIRUAxal8d8tCr0?p=preview