``Can you share your insights on transferring data from one controller to a service, and then accessing that data on another controller during the same

I'm encountering an issue with passing data from one controller to another using a service.

To achieve this, I have implemented prototype inheritance using the $rootScope in my controller and broadcasting the object so that other controllers can access the data.

However, by utilizing $rootScope, I am adding to the global namespace. I am looking for a way to transfer the data between controllers without polluting the global scope.

The scenario involves displaying minimal data in a table. Upon clicking on a specific record, I aim to display the complete data within the object.

This is how I currently manage it:

<tr ng-repeat="contact in filterContacts = (contacts.contactsData | filter:sensitiveSearch | orderBy:selectBox) " ng-style="{'background-color': contact.email == selectedContact.email ? 'lightgrey' : ''}" ng-click="selectContact(contact)">

In Controller A, I invoke this function from the view to pass the details of the selected row contact:

$scope.selectContact = function(contact) {
                contactService.selectedContactInfo(contact);
            };

Within the service, I simply return this data:

var selectedContactInfo = function(contact) {
            return contact;
        };

How can I retrieve this data in Controller B during the same event and display it on the view?

Reference Link: http://plnkr.co/edit/beOmiv?p=info

I prefer not to rely on $rootScope but still want access to the data in the other controller.

Answer №1

An effective method for passing state between controllers in Angular is to utilize services. These services act as singletons, allowing you to inject the same service into multiple controllers and share data seamlessly.

For example, you can create a property within your service, such as selectedUserID, which gets updated when a specific action, like clicking on a row, occurs. Subsequently, in another controller, you can inject the same service and access this property to determine which details to load.

To achieve this, you can have a method in your service like:

updateSelectedUser = function(userID) {
    this.selectedUserID = userID;
}

Then, your controller can call this method from the service upon the respective action:

myService.updateSelectedUser($scope.selectedUserID);

It is crucial to remember that services maintain state due to being objects and singletons. Hence, it's essential to ensure that external actions do not alter the state saved within the service without going through the designated methods. By doing so, you can prevent any potential synchronization issues and maintain the integrity of your service data.

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