DDD Symfony Bundle

Symfony Bundle for DDD Foundation. Provides Messenger integration for Command/Query buses and a base Kernel for DDD projects.

Installation

composer require alexandrebulete/ddd-symfony-bundle

Configuration

Add the bundle to your config/bundles.php:

return [
    // ...
    AlexandreBulete\DddSymfonyBundle\DddSymfonyBundle::class => ['all' => true],
];

Features

DddKernel - Auto-import Bounded Contexts

The bundle provides a DddKernel that automatically imports services, packages, and routes from your Bounded Contexts.

Setup

Extend DddKernel in your application's src/Kernel.php:

<?php

declare(strict_types=1);

namespace App;

use AlexandreBulete\DddSymfonyBundle\DddKernel;

class Kernel extends DddKernel
{
    // You can override configureContainer/configureRoutes if needed
}

What it does

The DddKernel automatically imports:

• Services: src/*/Infrastructure/Symfony/config/services.{php,yaml}
• Packages: src/*/Infrastructure/Symfony/config/packages/*.{php,yaml}
• Routes: src/*/Infrastructure/Symfony/routes/*.{php,yaml}

This means each Bounded Context can define its own configuration without modifying the main config/ folder.

Expected BC Structure

src/
├── Post/                              # Bounded Context
│   └── Infrastructure/
│       └── Symfony/
│           ├── config/
│           │   ├── services.php       # Auto-imported
│           │   └── packages/
│           │       └── doctrine.yaml  # Auto-imported
│           └── routes/
│               └── api.yaml           # Auto-imported
└── User/                              # Another Bounded Context
    └── Infrastructure/
        └── Symfony/
            └── config/
                └── services.php       # Auto-imported

Command/Query Bus

The bundle automatically configures two Symfony Messenger buses:

• command.bus - For write operations (Commands)
• query.bus - For read operations (Queries)

Automatic Handler Registration

Handlers decorated with #[AsCommandHandler] or #[AsQueryHandler] are automatically registered to their respective buses.

use AlexandreBulete\DddFoundation\Application\Command\AsCommandHandler;
use AlexandreBulete\DddFoundation\Application\Command\CommandInterface;

readonly class CreatePostCommand implements CommandInterface
{
    public function __construct(
        public string $title,
        public string $content,
    ) {}
}

#[AsCommandHandler]
readonly class CreatePostHandler
{
    public function __invoke(CreatePostCommand $command): void
    {
        // Handle the command
    }
}

Using the Buses

use AlexandreBulete\DddFoundation\Application\Command\CommandBusInterface;
use AlexandreBulete\DddFoundation\Application\Query\QueryBusInterface;

class PostController
{
    public function __construct(
        private CommandBusInterface $commandBus,
        private QueryBusInterface $queryBus,
    ) {}

    public function create(): Response
    {
        $this->commandBus->dispatch(new CreatePostCommand(
            title: 'My Post',
            content: 'Content...',
        ));

        // ...
    }

    public function list(): Response
    {
        $posts = $this->queryBus->ask(new GetPostsQuery(
            page: 1,
            itemsPerPage: 10,
        ));

        // ...
    }
}

Autocomplete Form Field

The bundle provides an Autocomplete Symfony Form field powered by Stimulus + Tom Select (no jQuery).

It is designed for admin back-offices and DDD projects, and works with ID-based values (Value Objects friendly).

Assets setup (Importmap)

If your application uses Importmap / AssetMapper:

php bin/console importmap:require tom-select
php bin/console importmap:require tom-select/dist/css/tom-select.default.css

Enable the Stimulus controller in assets/controllers.json:

{
    "controllers": {
        "@alexandrebulete/ddd-symfony-bundle": {
            "autocomplete": {
                "enabled": true,
                "fetch": "eager",
                "path": "@alexandrebulete/ddd-symfony-bundle/autocomplete_controller",
                "autoimport": {
                    "tom-select/dist/css/tom-select.default.css": true
                }
            }
        }
    }
}

Usage

use AlexandreBulete\DddSymfonyBundle\Form\Type\AutocompleteType;

$builder->add('authorId', AutocompleteType::class, [
    'label' => 'Author',
    'remote_url' => $this->urlGenerator->generate('admin_user_autocomplete'),
    'placeholder' => 'Search by email…',
    'min_length' => 2,
]);

The autocomplete endpoint must return:

{
  "results": [
    { "id": "uuid-1", "text": "user@example.com" }
  ]
}

Options

Option	Description
remote_url	AJAX endpoint URL
placeholder	Input placeholder
min_length	Minimum characters before search
limit	Maximum results returned
initial_text	Preselected label (edit forms)

Customization

Override Messenger Configuration

You can override the messenger configuration by creating your own config/packages/messenger.yaml:

framework:
    messenger:
        buses:
            command.bus:
                middleware:
                    - doctrine_transaction
            query.bus: ~

Extend DddKernel

If you need custom container or routes configuration, override the methods:

<?php

declare(strict_types=1);

namespace App;

use AlexandreBulete\DddSymfonyBundle\DddKernel;
use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

class Kernel extends DddKernel
{
    protected function configureContainer(ContainerConfigurator $container): void
    {
        parent::configureContainer($container);

        // Add your custom imports here
        $container->import($this->getProjectDir().'/config/custom/*.yaml');
    }
}