Updating resolved objects in ui.router parent states

Question

My question is two fold:

1 - I have a parent state and several child states using ui.router, there\'s one object (stored in mongodb) that is need in all states, but

Answer 1

you could store it in a service.

.service("myService", function($q) { 
  // the actual data is stored in a closure variable
  var data = undefined;
  return { 
    getPromise: function() { // promise for some data
      if (data === undefined) // nothing set yet, go fetch it
        return $http.get('resourceurl').then(function(value) { data = value; return data; });
      else
        return $q.when(data); // already set, just wrap in a promise.
    },
    getData: function() { return data; }, // get current data (not wrapped)
    setData: function(newDataVal) { data = newDataVal; } // reset current data
  }
})

// `parent` wont' enter until getPromise() is resolved. 
.state('parent', resolve:{objectX: function(myService) { return myService.getPromise(); } });

.controller('childstateCtrl', $scope, myService) {
    $scope.data.objectX = myService.getData();
    $scope.someEvent = function(someData){ 
      myService.setData(someData);
    }
}

.controller('otherChildCtrl', $scope, myService){
    // how to get the updated objectX?
    var data = myService.getData();
}

Answer 2

Not fully sure if I can see where is the issue... but if you are searching for a way how to share access to updated reference, it should be easy. There is an example

Let's have these states

$stateProvider
  .state('root', {
    abstract: true,
    template: '<div ui-view></div>',
    resolve: {objectX : function() { return {x : 'x', y : 'y'};}},
    controller: 'rootController',
  })
  .state('home', {
    parent: "root",
    url: '/home',
    templateUrl: 'tpl.example.html',
  })
  .state('search', {
    parent: "root",
    url: '/search',
    templateUrl: 'tpl.example.html',
  })
  .state('index', {
    parent: "root", 
    url: '/index',
    templateUrl: 'tpl.example.html',
  })

Working with only one controller (for a root state):

.controller('rootController', function($scope, objectX){
  $scope.data = { objectX: objectX };
})

And for this example, this is shared template:

<div>
  <h3>{{state.current.name}}</3>

  x <input ng-model="data.objectX.x"/>
  y <input ng-model="data.objectX.y"/>
</div>

So, in this scenario, parent (root) has injected an object data into $scope. That reference is then inherit as described here:

Scope Inheritance by View Hierarchy Only

Check that example in action here. If you need more details (than in the link above, check this Q&A)