Is there a way to tally ng-required errors specifically for sets of radio buttons?

Currently, I am working on a form in AngularJS that includes groups of radio buttons. One of my goals is to provide users with an error count for the form. However, I have encountered a peculiar issue:

After implementing this code to keep track of errors on the form, I noticed an unexpected behavior.

$scope.numberoferrors = function(form) {
  var count = 0,
  errors = form.$error;
  angular.forEach(errors, function(val) {
    if (angular.isArray(val)) {
      count += val.length;
    }
  });
  return count;
};

For instance, when I create a group of two required radio buttons and leave both unselected, form.$error reports two errors instead of one (one per input). Strangely, once one of the radio buttons is chosen, the error count returns to zero as expected.

<form name="myForm" ng-submit="submitForm()" ng-controller="ExampleController">
  Errors: {{numberoferrors(myForm)}}
  <input type="radio" ng-model="test" value="yes" required> Yes
  <input type="radio" ng-model="test" value="no" required> No
</form>

Is there a way to achieve a more precise error count for forms?

Check out this Plunkr for further reference.

Answer №1

To easily access each input field's $error, simply assign a name attribute to each field like this: name="...", then you can retrieve the error using formName.fieldName.$error

You can iterate through the form properties to verify all the fields.

An example from the Angular form guide illustrates this concept:

<form name="form" class="css-form" novalidate>
    Name:
    <input type="text" ng-model="user.name" name="uName" required="" />
    <br />
    <div ng-show="form.$submitted || form.uName.$touched">
      <div ng-show="form.uName.$error.required">Tell us your name.</div>
    </div>

This example clearly demonstrates the use of form.uName.$error

https://docs.angularjs.org/guide/forms

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