What is the best way to update the $scope of a directive from another directive's controller in Angular.js?

Question

What is the best way to update the $scope of a directive from another directive's controller in Angular.js?

One of my directives is responsible for loading a list of events from a service:

.directive('appointments', [function () {
        return {
            restrict: 'CE',
            scope: {
                ngTemplate: '=',
            },
            controller: ['$scope','calendarService', function ($scope, calendarService) {
               var vm = this;
               vm.events = calendarService.getEvents();
            }],
            controllerAS:'vm',
            link: function (scope, elem, attrs) {
                scope.getTemplateUrl = function () {
                    if (angular.isDefined(scope.ngTemplate))
                        return scope.ngTemplate;
                    else
                    return "/list.directive.html";
                }
            },
            template: '<div ng-include="getTemplateUrl()"></div>'
        }
    }])

Now I have another directive where I want to update this list. How can I do that in the first directive's controller?

.directive('appointmentsUpdate', [function () {
            return {
                restrict: 'CE',
                scope: {
                    ngEventId: '=',
                },
                controller: ['$scope','calendarService', function ($scope, calendarService) {
                   var vm = this;
                   vm.update = calendarService.updateEvent(scope.ngEventId).then(function(res){


   // The newly created item should be added to the List (vm.events) from the first directive

)
});
                }],
                controllerAS:'vm',
                link: function (scope, elem, attrs) {
                    scope.getTemplateUrl = function () {
                        if (angular.isDefined(scope.ngTemplate))
                            return scope.ngTemplate;
                        else
                        return "/list.directive.html";
                    }
                },
                template: '<div ng-include="getTemplateUrl()"></div>'
            }
        }])

javascript angularjs angularjs-directive

Answer 1

Answer №1

Utilize the angular broadcast service to achieve this functionality:

In the first directive, implement the following code snippet:

 $rootScope.$broadcast('greeting', data_to_be_sent);

In another directive, listen for the event and update its scope accordingly:

$scope.$on('greeting', processGreeting)

  function processGreeting($event, message){
    alert(['Received Message',message].join(' : '));
  }

Answer 2

Utilize the angular broadcast service to achieve this functionality:

In the first directive, implement the following code snippet:

 $rootScope.$broadcast('greeting', data_to_be_sent);

In another directive, listen for the event and update its scope accordingly:

$scope.$on('greeting', processGreeting)

  function processGreeting($event, message){
    alert(['Received Message',message].join(' : '));
  }

Answer 3

Answer №2

In order for directives to communicate with each other, the require property is used.

It works something like this:

return {
    restrict: 'AE',
    require: '^ParentDirective or ^SameLevelDirective'
}

If you need a more in-depth explanation, check out this resource on Directives That Communicate by ToddMotto.

Answer 4

In order for directives to communicate with each other, the require property is used.

It works something like this:

return {
    restrict: 'AE',
    require: '^ParentDirective or ^SameLevelDirective'
}

If you need a more in-depth explanation, check out this resource on Directives That Communicate by ToddMotto.

Answer 5

Answer №3

Singleton services ensure that when you make changes to a list in one location using calendarService.updateEvent(), the updated list will be reflected when you retrieve the data from the service in another directive. You can implement a watch function to monitor updates to the list:

$scope.$watch(() => calendarService.getEvents(), (newValue, oldValue) => {
    // Update your scope with the latest list
}, true);

Answer 6

Singleton services ensure that when you make changes to a list in one location using calendarService.updateEvent(), the updated list will be reflected when you retrieve the data from the service in another directive. You can implement a watch function to monitor updates to the list:

$scope.$watch(() => calendarService.getEvents(), (newValue, oldValue) => {
    // Update your scope with the latest list
}, true);

What is the best way to update the $scope of a directive from another directive's controller in Angular.js?

Answer №1

Answer №2

Answer №3

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