-<label class="radio"><input type="radio" ng-model="user.dinner" value="yes" ng-required="! user.student && ! user.dinner">Da</label>
-<label class="radio"><input type="radio" ng-model="user.dinner" value="no" ng-required="! user.student && ! user.dinner">Ne</label>
+<label class="radio"><input type="radio" name="user.dinner" ng-model="user.dinner" value="yes" ng-required="! user.student && ! user.dinner">Da</label>
+<label class="radio"><input type="radio" name="user.dinner" ng-model="user.dinner" value="no" ng-required="! user.student && ! user.dinner">Ne</label>