AngularJs: Binding ng-model to a list of radio buttons

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Im trying to bind the selected value in a list of radio buttons to an ng-model

I have:


                      
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                  灰色年华        
                
              
                            
                2021-01-04 03:14
              
            
            
                                                                       
The reason behind it is not working is, you are using ng-repeat & you are defining ng-model variable in it. The way ng-repeat works is, it create a new child scope(prototypically inherited) on each iteration of collection. So the ng-model which resides in ng-repeat template, belongs that newly created scope. Here ng-model="selectedOccurrence" create selectedOccurrence scope variable on each iteration of ng-repeat.

To overcome such a problem you need to follow dot rule while defining model in AngularJS

Markup

<body ng-controller="testController">
  <form>
    <div ng-repeat="option in occurrenceOptions track by $index">
      <input type="radio" name="occurrences" ng-value="option" ng-model="model.selectedOccurrence" />
      <label>{{ option }}</label>
    </div>
  </form>
  <div>The selected value is : {{ model.selectedOccurrence }}</div>
</body>


Code

$scope.model = {}; //defined a model object
$scope.model.selectedOccurrence = 'current'; //and defined property in it


Demo Plunkr



OR Another preferred way would be using controllerAs pattern while declaring controller(use this instead of $scope inside controller).

HTML

<body ng-controller="testController as vm">
    <form>
        <div ng-repeat="option in vm.occurrenceOptions">
            <input type="radio" name="occurrence" ng-value="option" ng-model="vm.selectedOccurrence" /><label>{{ option }}</label>
        </div>
    </form>
</body>


ControllerAs Demo
                                                                        
                                                        
            
            
              
                
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