In the example given below, I have used ng -repeat for dynamically creating input boxes. I have also used ng-form directive that allows the nesting of forms that can also be used for partial validation .

<form name="mainForm" ng-submit="submitAll()">
  <ul>        
        <!-- We add ng-form to the tag ng-repeat is on,
               to create a nested form context. -->
 <li ng-repeat="item in items" ng-form="subForm">
   <input type="text" required name="name" ng-model="item.name"/>

          <!-- now we can reference the validated field by name -->
          <span ng-show="subForm.name.$error.required">required</span>

          <!-- the nested form context itself can also be checked for validity. -->
          <button type="button" ng-disabled="subForm.$invalid" 
                     ng-click="submitOne(item)">Submit One</button>
 </li>
  </ul>

  <!-- last, but not least, the validation from our 
         subform bubbles up to our main form! -->
  <button type="submit" ng-disabled="mainForm.$invalid">Submit All</button>
</form>