<form name="myForm" novalidate class="form">
<div class="form-group" ng-class="{'has-error': myForm.name.$invalid}">
<label for="name">Name</label>
<input class="form-control" type="text" name="name" id="name" name-validator ng-model="name"/>
</div>
<div class="alert alert-danger" ng-show="myForm.$invalid">
<ul>
<li ng-show="myForm.name.$error.required">Name is required!</li>
<li ng-show="myForm.name.$error.min_length">Name should be at least two characters!</li>
<li ng-show="myForm.name.$error.invalid_chars">Name should only contain alphabetic characters!</li>
</ul>
</div>
</form>