Exploring Angularjs: Retrieving the value of a selected optgroup

When using my application, I need to extract the selected optgroup value from a dropdown menu.

Here is the sample code:

HTML:

<select ng-model='theModel' ng-change="display(theModel)" >
    <optgroup ng-repeat='group in collection' label="{{group.Name}}">
    <option ng-repeat='veh in group.Fields'>{{veh.Name}}</option>
    </optgroup>
</select>

Controller:

$scope.display = function(name) {
    alert(name); // To obtain the selected value and the optgroup value
}

VIEW DEMO APP

DESIRED OUTPUT: I want to show the selected optgroup value. For example, if I select Field1 under Collection 1, I should see Collection1.Field1 displayed.

javascriptangularjsselectng-options

Answer №1

After making some updates, the options now hold references to both the group and values. If the values in groups were unique, a value to group map in the controller variable could have been used to retrieve data easily. However, since the same values exist in multiple groups, I have included a reference to the group in the option values.

The select box now displays the desired text and the values of options have been updated to maintain references to the groups. This way, both pieces of information are readily available.

Check out the Updated Plunkr here: https://plnkr.co/edit/zvNcdDe0kmMJ1R67hOkK?p=preview

Controller:

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

app.controller("dobController", ["$scope", "$http",
  function($scope, $http) {
    $http.get('test.json').then(function(response) {
      $scope.collection = response.data.Collections;
      console.log(response);
    });

    $scope.matches = [];

    $scope.display = function(name) {

       alert("controller:"+name.split("::")[0]+" and value ::"+name.split("::")[1] );
    }

  }
]);

HTML:

<select ng-model='theModel' ng-change="display(theModel)">
    <optgroup ng-repeat='group in collection' label="{{group.Name}}">
    <option ng-repeat='veh in group.Fields' value='{{group.Name}}::{{veh.Name}}'>{{veh.Name}}</option>
    </optgroup>
    </select>

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