Angular Factory Manipulating Data (CRUD) with function in the Factory - angularjs

Question

I have a simple Angular App that uses a factory to pull a list of items from a "JSON" file. Eventually this will be connected to a database but for now I'm starting with just pulling from a static file. The JSON file contains an array of items. I'm really trying to understand how do I get a reference to my data in the factory after the promise has been returned to the controller.
My Factory is setup as follows:
angular.module("myApp").factory("ServiceTypeFactory", ['$http', function ($http ) {
return {
ServiceTypes: function () {
return $http.get('json/servicetypes.json').success
(
function (data) {
return data;
});
},
find: function (id) {
return _.findWhere(data, {ID:id}); // Not sure how to get access to the data
}
}
}]);
This works great I can share the Factory across multiple controllers. The part I'm missing is how do I reference a specific array item from my json file and update it in my controller. I'm not following how to get a reference to the actual data so when I modify the item in one controller it the change would be reflected in another controller.
In both of my controllers I have the following code to get a reference to the data initially.
var popService = function (data) {
$scope.ServiceTypes = data;
}
// IF at ANY time the Service Types have not been loaded we will populate them.
if (typeof $scope.ServiceTypes === "undefined") {
ServiceTypeFactory.ServiceTypes().success(popService);
}
My understanding is my $scope.ServiceTypes has really a reference to the data. How do I back in my factory in a function get access to the actual single source of my data. I get that the factory returns the data with functions an object but I'm missing how to reference this data back in my factory to manipulate it. In the future I want to perform CRUD operations on it for the time being I'm just trying to work out the mechanics.
What my JSON file looks like:
{
"serviceTypes": [
{
"ID": "1001",
"ServiceTypeName": "111111",
"Description": "aaaaaaa"
},
{
"ID": "1002",
"ServiceTypeName": "222222",
"Description": "bbbbbbb"
},
{
"ID": "1003",
"ServiceTypeName": "3333333",
"Description": "ccccccc"
},
{
"ID": "1004",
"ServiceTypeName": "444444",
"Description": "dddddddd"
},
{
"ID": "1005",
"ServiceTypeName": "5555555",
"Description": "eeeeeee"
}
]
}

Answer 1

Just needed to clean the code up a little. Watching a couple of quick example on egghead.io made it clear.