user3335796 user3335796 - 5 months ago 337
AngularJS Question

Disable ng-options value dynamically

I want to disable select option which is in loop. So far i have implemented in following link. Its working way I wanted but i have made code very long. Is there any other way to implement.

Code Link

<div ng-controller="OptionsController">
<button value="add" ng-click="add()">
add
</button>
<div ng-repeat="val in v">
<select ng-model="val.myColor" ng-change="call(c.name)">
<option ng-repeat="c in colors" ng-disabled="c.shade=='dark'" value="{{c.name}}">
{{c.name}}
</option>
</select>

</div>

</div>

Answer

ng-options with disabled rows has some details on how to use ng-options with disabled options.

Based on your current use of the ng-repeat: http://jsfiddle.net/rhz8hxL5/1/

<div ng-controller="OptionsController">
  <button value="add" ng-click="add()">
    add
  </button>
  <div ng-repeat="val in v">
    <select ng-model="val.myColor" ng-change="call()">
      <option ng-repeat="c in colors" ng-disabled="isDisabled(c)" value="{{c}}">
        {{c}}
      </option>
    </select>
  </div>
</div>

JS - I simplified it a bit for clarity in demonstration

angular.module('myApp', [])

function OptionsController($scope, $timeout) {
  $scope.v = [{
    myColor: 0
  }];

  $scope.inUse = [];
  $scope.isDisabled = function(name) {
    return $scope.inUse.indexOf(name) !== -1;
  }

  $scope.colors = ['black', 'white', 'red', 'blue', 'yellow'];

  $scope.add = function() {
        $scope.v.push({});
  }

  $scope.call = function() {
    $scope.inUse = [];

    for(var i=0; i<$scope.v.length; i++) {
      var val = $scope.v[i];

      $scope.inUse.push(val.myColor);
    }
  }
}

In English:

The $scope.inUse array is maintaining a list of currently selected values. When you change a dropdown value it invokes the call function. That function empties the $scope.inUse array and re-populates it with the currently selected values.

The $scope.isDisabled function returns a boolean on the basis that "If it has an index it is in use and thus disabled"

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