Angular Select Tags - angularjs

Question

I am creating a select tag in angular. According to many sites I have read and some posts on here, it says when using the select tag to not use "ng-repeat" on the option tag but use "ng-options" on the select tag so that is how I set it up. My question is, I want a specific option tag selected by default, how do i set the selected attribute using this method?
<select class="form-control" ng-model="selected_group" ng-change="new_group($event)" ng-options="group as (group.group_name | decodeuri) for group in groups"></select>

Answer 1

Choosing a default is easy: set selected_group equal to a particular group in your controller.
The basic idea is that you have a collection and the selected option is to be stored in your ng-model. To designate a selection from the start, you need to put something in ng-model. That would have to be in your controller.

Answer 2

You could add an <option> tag:
<select class="form-control" ng-model="selected_group" ng-change="new_group(selected_group)" ng-options="group as (group.group_name | decodeuri) for group in groups">
<option value="">Please Select an Option</option>
</select>

Answer 3

Here I have created small working demo
<div ng-app="myApp" ng-controller="myCtrl">
<select class="form-control" ng-model="option.group" ng-options="group as (group.name | myfilter) for group in groups">
</select>
</div>
var app = angular.module('myApp', []);
app.filter('myfilter', function() {
return function(v) {
return v == 'test3' ? 'filtered test3' : v;
};
});
app.controller('myCtrl', function($scope) {
$scope.groups = [{id:1,name:'test1', phone:'1234567890'},
{id:2,name:'test2', phone:'1234567890'},
{id:3,name:'test3', phone:'1234567890'}
];
$scope.option={
group: $scope.groups[1]
}
});