AngularJS Upgrading the Scope with $q

Lately, I've been working on updating code that resembles the following:

$scope.arrayOfThings = [];

function setArrayOfThings() {
     thingsService.get().then(function (things) {
         $scope.arrayOfThings = things;
     });
}

$scope.$on('arrayOfThings.add', setArrayOfThings);

My goal is to transform it into something like this (leveraging the less commonly known promise integration into bindings...):

$scope.arrayOfThings = thingsService.get();

However, I'm unsure how to ensure that arrayOfThings updates (or re-resolves) when the collection is modified from another $scope.

Answer №1

The arrayOfThings variable is restricted to child scopes, meaning that any modifications made to it within a child scope will still retain data-binding. To ensure that data-binding is updated correctly, the $scope.$apply method must be called manually when arrayOfThings is altered through an event (such as a DOM event or $broadcast).

Answer №2

If you want to be notified of a change, make sure to set up a watch on the function call thingsService.get within the controller. Here's an example:

$scope.$watch(thingsService.get, function(newVal, oldVal){
  $scope.arrayOfThings2 = newVal;  
} );

Just ensure that the service is being injected into the new controller for this to work correctly.

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