How to validate inputs dynamically created using ng-repeat, ng-show (angular)

Since the question was asked the Angular team has solved this issue by making it possible to dynamically create input names.

With Angular version 1.3 and later you can now do this:

<form name="vm.myForm" novalidate>
  <div ng-repeat="p in vm.persons">
    <input type="text" name="person_{{$index}}" ng-model="p" required>
    <span ng-show="vm.myForm['person_' + $index].$invalid">Enter a name</span>
  </div>
</form>

Demo

Angular 1.3 also introduced ngMessages, a more powerful tool for form validation. You can use the same technique with ngMessages:

<form name="vm.myFormNgMsg" novalidate>
    <div ng-repeat="p in vm.persons">
      <input type="text" name="person_{{$index}}" ng-model="p" required>
      <span ng-messages="vm.myFormNgMsg['person_' + $index].$error">
        <span ng-message="required">Enter a name</span>
      </span>
    </div>
  </form>