Get angularjs post value in controller - angularjs

Question

I want to get post value which i have send in $http.post() in controller when i click on edit button.
view page
<table id="example1" class="table table-bordered table-striped">
<thead>
<tr>
<th>Sl No.</th>
<th>Name</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="data in datas">
<td>{{$index + 1}}</td>
<td>{{data.name}}</td>
<td>
<a class="btn btn-info btn-sm btn-fill" ng-click="editsource(data.id)" data-toggle="modal" data-target="#myModal"><i class="fa fa-pencil-square-o"></i> Edit</a>
<a class="btn btn-danger btn-sm btn-edit btn-fill delete"><i class="fa fa-trash"></i> Delete</a>
</td>
</tr>
</tbody>
My script
<script type="text/javascript">
var app = angular.module('myapp', []);
app.controller('tabletest', function ($scope, $http) {
$http.get("<?php echo base_url() ?>admin/source_list_for_test")
.then(function (response) {
$scope.datas = response.data;
});
$scope.editsource = function (id) {//alert('hello');
$http.post("<?php echo base_url() ?>admin/edit_source_for_test?id="+id).success(function (data) {
alert(data);
$scope.id = data['id'];
$scope.name = data['name'];
});
};
});
controller
public function edit_source_for_test(){
$id= $_GET['id'];
$data['source_data'] = $this->admin_model->get_edit_source_for_test($id);
echo json_encode($data['source_data']);
}
Above is my code but id not get in controller,How i get selected record id in controller.