CODEWITHSUNDEEP
javascriptangularjs
Ben Tennyson
Ben Tennyson

Reputation: 649

How to get ID from Angular dropdown from value?

As you can see in the code, I have a list cars Car A,B, and C with corresponding ids in availableCars list. I’m getting already chosen car from a service. It is not an object just the car name. User has option to choose different car but on change, I have to send car id to other service. Is there any simplest way to achieve my goal?

(function(angular) {
  'use strict';
angular.module('ngrepeatSelect', [])
  .controller('ExampleController', ['$scope', function($scope) {
    
    $scope.carName = (function getCarNameFromService(){
      return 'Car B';
    })();
    
    $scope.availableCars =  [
       {id: '1A', name: 'Car A'},
       {id: '2B', name: 'Car B'},
       {id: '3C', name: 'Car C'}
     ]
 }]);
})(window.angular);
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Example - example-ngrepeat-select-production</title>
  

  <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.5/angular.min.js"></script>
  <script src="app.js"></script>
  

  
</head>
<body ng-app="ngrepeatSelect">
  <div ng-controller="ExampleController">
  <form name="myForm">
    <label for="repeatSelect"> Repeat select: </label>
    <select name="repeatSelect" id="repeatSelect" ng-model="carName">
      <option ng-repeat="option in availableCars" value="{{option.name}}">{{option.name}}</option>
    </select>
  </form>
  <hr>
  <tt>selected car name = {{carName}}</tt><br/>
   <tt>selected car id = ???</tt><br/>
</div>
</body>
</html>

Upvotes: 0

Views: 2256

Answers (2)

sourdoughdetzel
sourdoughdetzel

Reputation: 664

Rather than using an ng-repeat on the "option" element inside of a select, you can use "ng-options". ng-options

I created a plnkr to illustrate your example. Some of the key pieces of code are as follows:

JS

  var carName = "Car B"; //name provided to this controller 

    $scope.availableCars =  [
       {id: '1A', name: 'Car A'},
       {id: '2B', name: 'Car B'},
       {id: '3C', name: 'Car C'}
     ]

     $scope.selectedCar = $scope.availableCars.filter(function(car){
         return car.name === carName;
     })[0];

    $scope.selectedId = $scope.selectedCar.id;

     $scope.updateCar = function(id){
         $scope.selectedId = id;
     }

and

HTML

<form name="myForm">
    <label for="repeatSelect"> Repeat select: </label>
    <select ng-options="car as car.name for car in availableCars" ng-model="selectedCar" ng-change="updateCar(selectedCar.id)"></select>
  </form>

Notice the "ng-change" and the "ng-options" in the html.

Upvotes: 1

Michel
Michel

Reputation: 28359

User has option to choose different car but on change, I have to send car id to other service

You could use ng-change for that:

<select ng-change="sendInfo(...)" ...>
...
</select>

Actually, I would advise to bind to the model the car id instead of the car name. Or a car object, providing you switch to ng-options. That way you could send the selected id.

Upvotes: 0

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