Angularjs ngMessages ng-messages={multiple .$error}? - angularjs

Question

I'm new to angularjs and I was just wondering about what ngMessage 'ng-messages' attribute can do.
I'm trying to display one ngMessage for multiple input[type=text] elements. for example:
<input type="text" id="name1" ng-model="person.name1" />
<input type="text" id="name2" ng-model="person.name2" />
<input type="text" id="name3" ng-model="person.name3" />
<input type="text" id="name4" ng-model="person.name4" />
<div id="error"
ng-messages="person.name1.$error ||
person.name2.$error ||
person.name3.$error ||
person.name4.$error"
ng-show="person.name1.$touched ||
person.name2.$touched ||
person.name3.$touched ||
person.name4.$touched"
ng-include="errorMsg.html"
/>
One validation message will display for all 4 input[type=text] attribute.

Answer 1

Try To use it it in the below manner:-
<form name="Form_Name">
<label>
Enter your name:
<input type="text"
name="myName"
ng-model="name"
ng-minlength="5"
ng-maxlength="20"
required />
</label>
<pre>myForm.myName.$error = {{ myForm.myName.$error | json }}</pre>
<div ng-messages="myForm.myName.$error" style="color:maroon" role="alert">
<div ng-message="required">You did not enter a field</div>
<div ng-message="minlength">Your field is too short</div>
<div ng-message="maxlength">Your field is too long</div>
</div>
</form>

Answer 2

The best solution I have come across so far is to group the fields you want with data-ng-form='subform' name='subform' and then for the messages element: data-ng-messages='subform.$error'