Encountering a problem when trying to add the AngularJS multiple chosen directive

Encountering an issue with the AngularJS chosen directive, I am receiving the following error:

Error: TypeError: a.map is not a function at nh.q.writeValue (angularjslatest.js:307) at Object.e.$render (angularjslatest.js:328) at angularjslatest.js:310 at angularjslatest.js:146 at m.$digest (angularjslatest.js:147) at m.$apply (angularjslatest.js:150) at l (angularjslatest.js:102) at XMLHttpRequest.s.onload (angularjslatest.js:108)

Explanation of my code:

<select chosen 
        multiple 
        class="form-control oditek-form" 
        name="category" 
        id="category" 
        ng-model="category" 
        ng-options="s.value as s.name for s in listOfCategory">
</select>

The controller code is provided below.

$scope.listOfCategory = [{
  name: 'Select Category',
  value: ''
}];

$scope.category = $scope.listOfCategory[0];

var fileURL = '';
var url1 = '../service/admin/vechile/service/service.php?action=getAllCategoryData';
var method = 'GET';
var data1 = '';

DataService.connectToServerSideScript(method, url1, data1).then(function(response) {
  if (response.length > 0) {
    angular.forEach(response, function(obj) {
      var cdata = {
        'name': obj.category_name,
        'value': obj.id
      };
      $scope.listOfCategory.push(cdata);
    })
  }
}, function(error) {

});

Although I am successfully retrieving all the data, there are still errors appearing in the browser console. My objective is to resolve these errors.

Answer №1

To set up your chosen model as an array, follow these steps:

$scope.category = angular.isArray($scope.listOfCategory) && $scope.listOfCategory.length > 0 ?
                      [$scope.listOfCategory[0]] : [];

Keep in mind that this solution will address the issue flagged below:

Error: TypeError: a.forEach is not a function

Answer №2

I encountered a similar issue with a 'chosen multiple select' problem, receiving the same error message three times. The error log displayed the following information. Sharing the solution for the benefit of others.

TypeError: a.map is not a function 
at mh.q.writeValue (angular.js:30513) 
at e.$render (angular.js:33327) 
at Object.c.$render (angular-chosen.min.js:7) 
at angular.js:29306 
at m.$digest (angular.js:18253) 
at b.$apply (angular.js:18531) 
at HTMLButtonElement. (angular.js:27346) 
at HTMLButtonElement.dispatch (jquery.min.js:3) 
at HTMLButtonElement.q.handle (jquery.min.js:3)

To resolve this issue, I established two variables - one for the model variable and another for storing the data. For example:

In the controller,

$scope.x = {
   draftVar: []
};

$scope.save = function(){
   $scope.x.savingVar = $scope.x.draftVar.join(',');
   save();

}

<select ng-model="x.draftVar" chosen multiple chosen-updater ng-options="xx.id as xx.name for xx in XXs"> 
    <option value=""></option>
</select>

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