Advanced

Handlers

Basics

Handlers in MoonShine are reusable handlers that allow you to easily add custom actions to resources.

The main advantages:

  • Do not require the creation of controllers,
  • Automatic error handling within MoonShine,
  • Many ready-made methods for interaction with the system,
  • Simple integration with UI through automatic button generation,
  • Automatically displayed in the interface after connection.

Creating Handler

To create a new Handler, use the command:

php artisan moonshine:handler MyCustomHandler

You can learn about all supported options in the section Commands.

After executing the command, a Handler class will be created in the app\MoonShine\Handlers directory with the following structure:

namespace App\MoonShine\Handlers;
 
use MoonShine\UI\Exceptions\ActionButtonException;
use MoonShine\Laravel\MoonShineUI;
use MoonShine\Laravel\Handlers\Handler;
use MoonShine\Contracts\UI\ActionButtonContract;
use MoonShine\UI\Components\ActionButton;
use Symfony\Component\HttpFoundation\Response;
 
class MyCustomHandler extends Handler
{
    /**
     * @throws ActionButtonException
     */
    public function handle(): Response
    {
        if (! $this->hasResource()) {
            throw new ActionButtonException('Resource is required for action');
        }
 
        if ($this->isQueue()) {
            // Job here
 
            MoonShineUI::toast(
                __('moonshine::ui.resource.queued')
            );
 
            return back();
        }
 
        self::process();
 
        return back();
    }
 
    public static function process()
    {
        // Logic here
    }
 
    public function getButton(): ActionButtonContract
    {
        return ActionButton::make($this->getLabel(), $this->getUrl());
    }
}

Registration

To register a Handler in a resource, you need to override the handlers() method:

class PostResource extends ModelResource
{
    protected function handlers(): ListOf
    {
        return parent::handlers()->add(new MyCustomHandler());
    }
}

After registration, a button for launching the Handler will automatically appear on the right side of the resource's index page.

Interaction

Handler is closely integrated with the resource and has access to:

  • The current resource via $this->getResource(),
  • Queueing capabilities,
  • Notification system and settings for users who will receive notifications via notifyUsers(),
  • Modifying the button via modifyButton().