AngularJS dropdown not showing selected value

Raj Adroit picture Raj Adroit · Apr 2, 2015 · Viewed 15.5k times · Source

Am facing problem in displaying selected value in angular dropdown. it works when i give like this

$scope.selectedItem = $scope.items[1];

not working, if i give directly that value

$scope.selectedItem = { name: 'two', age: 27 };

HTML:

<html ng-app="app">
  <body>
    <div ng-controller="Test">
      <select ng-model="selectedItem" ng-options="item.name for item in items">
      </select>
    </div>
  </body>
</html>

JS:

var app = angular.module('app',[]);
app.controller('Test',function($scope){
   $scope.items = [{name: 'one', age: 30 },{ name: 'two', age: 27 },{ name: 'three', age: 50 }];
  $scope.selectedItem = $scope.items[1];
});

CODEPEN: http://codepen.io/anon/pen/zxXpmR

SOLUTION:

Thank you samir-das. I fixed as per your suggestion.

var choosen_value = { name: 'two', age: 27 };
angular.forEach($scope.items, function(item){
  if(angular.equals(choosen_value, item)){
    $scope.selectedItem = item;
  }
});

Answer

noj picture noj · Apr 2, 2015

As explained in the other answers, while the two objects may have the same properties and values, they are two different objects so angular doesn't consider them to be equal.

You can however use the track by expression in ng-options to specify a property which will decide equality:

ng-options="item.name for item in items track by item.name"

http://codepen.io/anon/pen/WbWMrp