how to validate two select boxes in angular js - angularjs

Question

this is my html form that have to use to get the details but when i use the required attribute in the select tag, only the first one is validated and not the second one or an other field after the select tag, for eg if i select option in the first select and click post project then there is no error about the validation, and if i dont select the data from the first select tag there is validation error popup saying that the field is required,
<form name="myForm" role="form" action="#">
<div class="well" style="margin-left:20px; margin-right:20px">
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-lg-12">
<h4 style="color:darkblue">What type of project do you require?</h4>
</div>
</div>
<br>
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-md-6 col-lg-6">
<select name="drop1" class="form-control" ng-model="project.match1">
<option value="">-- Select Category --</option>
<option ng-repeat="items in serviceCategory" value="{{items.ServiceCategoryId}}">{{items.ServiceCategoryName}}</option>
</select>
</div>
<div class="col-md-6 col-lg-6">
<select class="form-control" ng-model="project.match2" name="drop2">
<option value="">-- Select Sub Category --</option>
<option ng-repeat="a in service" ng-if="a.ServiceCategoryId==project.match1">
{{a.ServiceName}}
</option>
</select>
</div>
</div>
<br>
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12">
<textarea ng-model="project.ServiceCategories" placeholder="Add Service Categories here" rows="3" style="resize:none; width:100%"></textarea>
</div>
</div>
</div>
<div class="well" style="margin-left:20px; margin-right:20px">
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12 text-left">
<h4 style="color:darkblue">What is your Project about</h4>
</div>
</div>
<br>
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12 text-left">
Describe your Project<br>
</div>
</div>
<div class="row" style="padding-top:10px; margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12">
<input type="text" ng-model="project.DescribeProject" style="width:100%">
</div>
</div>
<br>
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-md-6 col-lg-6">
What is your Project about?
</div>
<div class="col-md-6 col-lg-6">
</div>
</div>
<div class="row" style="padding-top:10px; margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12">
<textarea ng-model="project.AboutProject" ng-trim="false" rows="3" cols="70" ng-maxlength="5000" style="resize:none; width:100%;"></textarea>
</div>
</div>
<br>
<div class="row" style="margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12">
Attach files
</div>
</div>
<div class="row" style="padding-top:10px; margin-left:5px; margin-right:5px">
<div class="col-md-12 col-lg-12">
<!--attach file code-->
<div style="height:30px; width:100%;">
</div>
</div>
</div>
<div class="row" style="margin-bottom:15px; margin-left:5px; margin-right:5px">
<div class="col-md-1 col-lg-1"></div>
<div class="col-md-10 col-lg-10">
<div class="text-right">
<button class="btn btn-default btn-primary" type="submit" ng-click="showData(project)">Post Project</button>
<button class="btn btn-default" data-dismiss="modal" aria-label="Close" style="color:black; border-color: #2e6da4">Close</button>
</div>
</div>
<div class="col-md-1 col-lg-1"></div>
</div>
</div>
</form>
The Script is
var app = angular.module("MyApp", []);
app.controller('MainCtrl', function ($scope, $http) {
$http.get('/JsonData/ServiceCategory.json').success(function (response) {
console.log("Service Category Connected");
$scope.serviceCategory = response;
});
$http.get('/JsonData/Service.json').success(function (res) {
console.log("Service Connected");
$scope.service = res;
});
$scope.showData = function (inputData) {
var Project = new Object();
Project.Category = inputData.match1;
Project.SubCategory = inputData.match2;
Project.ServiceCategories = inputData.ServiceCategories;
Project.Description = inputData.DescribeProject;
Project.AboutProject = inputData.AboutProject;
var ProjectJson = JSON.stringify(Project);
alert(ProjectJson);
}
});