How to refresh Angular $http cache? - angularjs

Question

My service populates all items using $http and a cache when the controller is activated. If I create a new item, by doing an $http.post(), what is the best way to refresh the cache?
The problem with the example below is the cached getAll call will return an outdated array:
(function () {
'use strict';
angular
.module('myapp')
.factory('items', itemsService)
.controller('Items', itemsController);
// myCache was created using angular-cache
itemsService.$inject = ['$http', 'myCache'];
function itemsService ($http, myCache) {
var service = {
getAll : function () {
return $http.get('/api/item', myCache);
},
createNew : function (item) {
return $http.post('/api/item', item);
}
};
return service;
}
itemsController.$inject = ['items'];
function itemsController (items) {
var vm = this;
vm.items = [];
vm.item = {};
activate();
function activate() {
items.getAll().then(function(response){
vm.items = response.data || [];
});
}
function createNew() {
items.createNew(vm.item).then(function(response){
vm.items.push(response.data);
});
}
}
})();
Edit #1 : Invalidating Cache
I've modified the code to invalidate the cache when a new item is created. The addition of the $q service, and manually rejecting or resolveing the calls seems very tedious and bloated.
Is there a better way?
(function () {
'use strict';
angular
.module('myapp')
.factory('items', itemsService)
.controller('Items', itemsController);
itemsService.$inject = ['$q', '$http', 'CacheFactory'];
function itemsService ($q, $http, CacheFactory) {
var _cache = CacheFactory.get('items') || CacheFactory('items');
var service = {
getItems : function(refresh) {
var d = $q.defer();
if (refresh) { _cache.invalidate(); }
$http.get('/api/item', _cache).then(function(response){
d.resolve(response.data);
}, function(err){ d.reject(err); });
return d.promise;
},
createNew : function(info){
var d = $q.defer();
$http.post('/api/item', info).then(function(response){
_cache.invalidate();
d.resolve(response.data);
}, function(err){ d.reject(err); });
return d.promise;
}
};
return service;
}
itemsController.$inject = ['items'];
function itemsController (items) {
var vm = this;
vm.items = [];
vm.item = {};
activate();
function activate() {
items.getAll().then(function(response){
vm.items = response.data || [];
});
}
function createNew() {
items.createNew(vm.item).then(function(response){
vm.items.push(response.data);
});
}
}
})();