Using ng-repeat to generate select options (with Demo) - angularjs

Question

controller:
$scope.send_index = function(event, val){
console.log(val);
$scope.variable = 'vm.areas['+val+'].name';
console.log( $scope.variable );
};
and this is in the view:
<select ng-model="vm.areas">
<option ng-repeat="area in vm.areas" ng-value="area" id="{{area}}" ng-click="send_index($event, $index)">{{area.name}}
</select>
<input value="{{variable}}">
where "vm" is my model.
Expression inside of an expression (Angular)
my problem is that i need to have an {{array[]}}, with the index as another expression,
e.g: {{Array[{{val}}]}}.
Already tryed this:
$scope.variable = ''+'vm.areas['+val+'].name'+'';
The problem is in the view, "variable" is shown like an string
(vm.areas[0].name)
and it donst get the valor of that query.

Answer 1

This is NOT the correct way to use ng-model with a <select> element in AngularJS:
<!-- ERRONEOUS
<select ng-model="vm.areas">
<option ng-repeat="area in vm.areas" ng-value="area" id="{{area}}" ng-click="send_index($event, $index)">{{area.name}}
</select>
<input value="{{variable}}">
-->
There is no need to use the ng-click directive. The select directive handles that automatically. The ng-model directive receives or sets the chosen option.
See:
Using ng-repeat to generate select options
Using select with ng-options and setting a default value
angular.module('ngrepeatSelect', [])
.controller('ExampleController', ['$scope', function($scope) {
$scope.data = {
model: null,
availableOptions: [
{id: '1', name: 'Option A'},
{id: '2', name: 'Option B'},
{id: '3', name: 'Option C'}
]
};
}]);
<script src="https://unpkg.com/angular/angular.js"></script>
<div ng-app="ngrepeatSelect">
<div ng-controller="ExampleController">
<form name="myForm">
<label for="repeatSelect"> Repeat select: </label>
<select name="repeatSelect" id="repeatSelect" ng-model="data.model">
<option ng-repeat="option in data.availableOptions" value="{{option.id}}">{{option.name}}</option>
</select>
</form>
<hr>
<tt>model = {{data.model}}</tt><br/>
</div>

Answer 2

Try data-ng-value instead of value
<input data-ng-value="{{variable}}">