angularjs - ng-options taking value from 0,1,2...., instead of using Id given in option -

i have data this

localitems =       [{id: 234565, name: "my class"},        {id: 871243, name: "class 321"}];

i using in template,

ng-options="item.id item.name item in localitems"//used work

my angularjs version 1.2.15

what want:

<option value="234565">my class</option> <option value="871243">class 321</option>

what getting:

<option value="0">my class</option> <option value="1">class 321</option>

it worked every time, don't understand why not working

is because id value's large?

if want have property value assigned right id use track by:

ng-options="item.id item.name item in localitems track item.id"

but ng-model assigned right value anyway

EIght