Validating Input in ng-repeat

Issue

I have the following code

<div>
    <button ng-click="myController.addEmptyStudent()">+</button>
</div>
<div ng-repeat="student in myController.students">
    <input type="text" ng-model='student['Name']" required>
    <input type="text" ng-model='student['Address']" required>
</div>

Now, Since it is creating input boxes when I click on (+) plus button.
I want to validate that no two Names are same before submitting the form.

Solution

Finally I got the solution.
Changes in controller

    function studentNameChanged() {
        vm.duplicateNames = false;
        let studentNamesArray = students.map(item => item['studentName']);
        vm.duplicateNames = studentNamesArray.some( (item, index) => {
            return (studentNamesArray.indexOf(item) !== index)
        });
    }

Changes in HTML file

<div>
    <button ng-click="myController.addEmptyStudent()">+</button>
</div>
<div ng-repeat="student in myController.students">
    <input type="text" ng-change="myController.studentNameChanged()" ng-model="student['Name']" required>
    <input type="text" ng-model="student['Address']" required>
</div>
<div>
   <div style="color:red;" ng-show="myController.duplicateNames">
   Attribute Names must be different
   </div>
</div>

Answered By - Satish Dalal