sample service

app.js

//app.config(function($stateProvider, $urlRouterProvider.......
//........
    .state('files', {
      url: '/files',
      views: {
        //adapt to fit your application
        'cabinetContent' :{
          templateUrl: 'templates/files.html',
          controller: 'FilerCtrl',
          resolve: {
            //a property that has to be resolved before the 
            //controller can be instantiated.
            //Passing appDBBridge as a service and using the 
            //selectOneDoc(document_id_object, collectionName).
            //document_id_object should be an object with an id or _id
            //property. the collectionName is always a concatenation of
            //the service name and the method that should be executed.
            //This returns a resolved promise which can be injected into
            //a controller like 'FilerCtrl'
            userRootCabinet: function (appDBBridge) {
              return appDBBridge.selectOneDoc({}, 'Filer.thisUserFiles');
            }
          }
        }
      }
    })

controller.js

app.controller('FilerCtrl', [
  '$scope',
  'userRootCabinet',
  'appDBBridge',
  '$timeout',
  function($scope, userRootCabinet, appDBBridge, $timeout) {

  $scope.userRootCabinet = [];

  //UserRootCabinet argument is populated from our resolved property.
  //when we defined our state in app.js
  if (userRootCabinet) {
    $scope.userRootCabinet = _.values(_.omit(userRootCabinet, ['_id', '_rev']));
  }
  //we bind an event to trigger every time we navigate to this view.
  //the appDBBridge.fetchAndSyncDataToScope(document_id, serviceName, arguments)
  //check the comments on the method to explain how this works. 
  //_.values(_.omit(updatedDoc, ['_id', '_rev'])); removes unnecessary properties 
  //from the response in gotten from executing Filer.thisUserFiles().
  $scope.$on('$ionicView.enter', function(){

    appDBBridge.fetchAndSyncDataToScope('', 'Filer.thisUserFiles', [])
    .then(function (updatedDoc) {
      var u = $timeout(function () {
        $scope.userRootCabinet = _.values(_.omit(updatedDoc, ['_id', '_rev']));
      }, 1000);
      $scope.$on('$destroy', function () {
        u.cancel();
      });
    });
  });
}]);

service.js

 app.factory('Filer', ['$http', function($http){
   return {
      /**
       * [thisUserFiles request for files belonging to this user]
       * @param  {[type]}   param
       * @param  {Function} callback
       * @return {[type]}
       */
      thisUserFiles : function thisUserFiles (param){
        return $http.get('/api/v2/users/files', param)
                .then(function(data) {
                  return data;
                }, function (data, status) {
                  return status;
                });
      };     
   }
   
 }]);