Bind ng-options value and label to ng-model

Question

I'm using ng-options to generate a select tag whose options are locations. The labels are the location names, and the values are the location ID (in database).

I've bound the value (location ID) to an ng-model attribute, but I'd also like to bind the label (location name) to a different ng-model attribute. (I need to separate the id field since this will be POSTed to a server that expects this particular attribute.) What's the best way to do this in Angular?

My code:

<div ng-app="app"><div ng-controller="edit">
  <select ng-model="purchase.pickUpLocationId" ng-options="loc.id as loc.name for loc in purchase.availableLocations"></select>

  <!-- This is the model not yet bound: -->
  <p>You have selected {{ purchase.pickUpLocationName }}</p>

</div></div>

---

var app = angular.module('app', []);

app.controller('edit', ['$scope', function($scope) {
    $scope.purchase = {
        pickUpLocationId: 30,
        availableLocations: [
            {id: 20, name: "Charleston, SC"},
            {id: 30, name: "Atlanta, GA"},
            {id: 40, name: "Richmond, VA"},
        ]
    };
}]);

Answer 1

You can change to the following and bind to the entire object. You'll still have access to id later on for whatever you wish to do with it

<select ng-model="selected" ng-options="loc as loc.name for loc in purchase.availableLocations"></select>

---

<p>You have selected {{ selected.name }}</p>
<p>You havd id too! {{ selected.id }}</p>

JSFiddle Link

Answer 2

My suggestion is to model as a hash first

{
   "20": "Charleston, SC",
   "30": "Atlanta, GA"
}

and then use {{availableLocations[purchase.pickUpLocationId]}}

and make ng-options as

<select ng-model="purchase.pickUpLocationId" ng-options="id as label for (id, label) in purchase.availableLocations"></select>