Angular bootstrap ui modal scope binding with parent - angularjs

Question

I am having an Angular issue getting a modal scope to unbind from the parent scope. I want the scope object I pass into the modal to be separate from the corresponding scope object.
No matter how I structure the modal object the parent always mirrors it. The only solution I have found is to change the object property names, but that would be cumbersome to do for every modal in my project.
For example, I can have a $scope variable in the parent $scope.parentData.firstName and a modal variable $scope.modalData.a.b.c.firstName, and the parent will mirror the modal value.
I guess there is some parent child $scope issues here that I am not getting.
Here is a plunk illustrating the issue:
http://plnkr.co/edit/5naWXfkv7kmzFp7U2KPv?p=preview
HTML:
<div ng-controller="ModalDemoCtrl">
<script type="text/ng-template" id="myModalContent.html">
<div class="modal-header">
<h3>I'm a modal!</h3>
</div>
<div class="modal-body">
<input ng-model="modalData.a" />
<input ng-model="modalData.b" />
<input ng-model="modalData.c" />
Selected: <b>{{ sourceData }}</b>
</div>
<div class="modal-footer">
<button class="btn btn-primary" ng-click="ok()">OK</button>
<button class="btn btn-warning" ng-click="cancel()">Cancel</button>
</div>
</script>
<button class="btn btn-default" ng-click="open()">Open me!</button>
{{sourceData}}
<div ng-show="sourceData">Selection from a modal: {{ test }}</div>
</div>
</body>
</html>
JS:
angular.module('plunker', ['ui.bootstrap']);
var ModalDemoCtrl = function ($scope, $modal, $log) {
$scope.sourceData = {a:'abc',b:'bcd',c:'cde'};
$scope.open = function () {
var modalInstance = $modal.open({
templateUrl: 'myModalContent.html',
controller: ModalInstanceCtrl,
resolve: {
data: function () {
return $scope.sourceData;
}
}
});
modalInstance.result.then(function (selectedItem) {
$scope.scopeData = selectedItem;
}, function () {
$log.info('Modal dismissed at: ' + new Date());
});
};
};
// Please note that $modalInstance represents a modal window (instance) dependency.
// It is not the same as the $modal service used above.
var ModalInstanceCtrl = function ($scope, $modalInstance, data) {
$scope.modalData = {};
$scope.modalData = data;
$scope.ok = function () {
$modalInstance.close($scope.modalData);
};
$scope.cancel = function () {
$modalInstance.dismiss('cancel');
};
};

Answer 1

You are passing a reference to your current object, what you want to do is use angular.copy() to pass a deep copy of the object to the modal plnkr:
var modalInstance = $modal.open({
templateUrl: 'myModalContent.html',
controller: ModalInstanceCtrl,
resolve: {
data: function () {
return angular.copy($scope.sourceData); // deep copy
}
}
});