AngularJS. Return new factory instance - angularjs

Question

I'm a newbie in AngularJS and have faced the issue.
Can I reinject my factory singleton object across all controllers, where it's been injected?
For example:
.factory('medicalCenterService', function(MedicalCenterResource) {
var medicalCenterService = {};
medicalCenterService.currentMedCenter = MedicalCenterResource.get();
medicalCenterService.reloadMedCenter = function() {
medicalCenterService.currentMedCenter = MedicalCenterResource.get();
return medicalCenterService.currentMedCenter;
};
medicalCenterService.updateMedicalCenter = function(medicalCenter) {
MedicalCenterResource.updateMedicalCenter(medicalCenter);
medicalCenterService.currentMedCenter = medicalCenter;
};
return medicalCenterService;
})
In MedicalCenterController I get singleton object with medical center when application starts:
function MedicalCenterController($scope, medicalCenterService) {
$scope.currentMedCenter = medicalCenterService.currentMedCenter;
}
But later I try to edit medical center fields (name, address, etc..) in AccountProfileController
function AccountProfileController($scope, medicalCenterService) {
$scope.currentMedCenter = medicalCenterService.currentMedCenter;
$scope.applyMedCenterChanges = function (currentMedCenter) {
medicalCenterService.updateMedicalCenter(currentMedCenter);
};
}
And what I'm expecting to have is the object with updated fields.
How to return a new instance of my singleton?

Answer 1

Do you want something like this?
.factory('MedicalCenter', function(MedicalCenterResource) {
var MedicalCenter = function () {
var center = MedicalCenterResource.get(),
update = function() {
MedicalCenterResource.updateMedicalCenter(center)
};
return {
center: center,
update: update
}
};
return MedicalCenter;
})
function MedicalCenterController($scope, MedicalCenter) {
center = new MedicalCenter();
$scope.currentMedCenter = center.center;
}
function AccountProfileController($scope, MedicalCenter) {
center = new MedicalCenter();
$scope.currentMedCenter = center.center;
$scope.applyMedCenterChanges = function () {
center.update();
};
}

Answer 2

Like you wrote in post services are Singletons and its good way to share data over services. However if you want to create new instance of factory/service, you can't do that but we can create list of objects in one service/factory where each list item represents different instance. Something like:
.factory('medicalCenterService', function(MedicalCenterResource) {
var medicalCenterServices = [
{ctrlName: 'MedicalCenterController',medicalCenterService: {/*....*/}},
{ctrlName: 'AccountProfileController',medicalCenterService: {/*....*/}},
];
//......
})