Symfony 7: A tribute to Attributes

In the ever-evolving landscape of web development, Symfony 7 stands out with its use of Attributes. This talk delves into the heart of Symfony 7, celebrating its innovative use of Attributes to simplify annotations, streamline configuration, and boost readability. We'll journey through examples showcasing the transformative power of Attributes in Symfony projects. Whether you're new to Symfony or a seasoned developer, join us to witness the synergy of modern PHP and Symfony's elegant architecture.

Transcript

1. Symfony 7: A tribute to Attributes @nicolasgrekas
2. 👌 👍 Auto-discovery Auto-configuration Auto-wiring #[Attributes]
3. symfony.com/releases @nicolasgrekas
4. Backward Compatibility Promise • Upgrade every month for bug fixes • Upgrade every 6 months for features @nicolasgrekas "extra": { "symfony": { "require": "6.4.*" } }
5. Continuous Upgrade Path • Fix deprecations every 6 months • Upgrade every 2 years for new major @nicolasgrekas "require": { "php": ">=8.2" }
6. 🎉 Symfony 7 • Remove deprecated code paths • Add native return types • Add native types to public|protectedproperties @nicolasgrekas
7. RIP Doctrine Annotations ⚠️ PHP 8 introduced attributes, which are a native replacement for annotations @nicolasgrekas
8. RIP SensioFrameworkExtraBundle @Route @Entity @IsGranted @Security @ParamConverter @Cache @Template @nicolasgrekas
9. 😍 #[Attributes] @nicolasgrekas #[Route(path: '/', name: 'home')] // return list<ReflectionAttribute> ReflectionMethod::getAttributes(); // return new Route(path: '/', name: 'home'); ReflectionAttribute::newInstance(); // return ['path' => '/', 'name' => 'home']; ReflectionAttribute::getArguments();
10. Attributes are ignorable; they don't create coupling Attributes are useful hints telling how some code could be used @nicolasgrekas
11. @nicolasgrekas 422 Unprocessable Entity? class DiscountExpired extends DiscountException { // ... }
12. @nicolasgrekas Decoupled! #[WithHttpStatus(422)] class DiscountExpired extends DiscountException { // ... }
13. @nicolasgrekas services: _defaults: autowire: true # Look at parameter types to auto-inject deps autoconfigure: true # Look at parent types to auto-register classes # Load every class in a namespace/directory as a service App\: resource: '../src/' # Add more service definitions when explicit configuration is needed config/services.yaml
14. @nicolasgrekas FrameworkBundle's FrameworkExtension $container->registerForAutoconfiguration(Command::class) $container->registerForAutoconfiguration(AbstractController::class) $container->registerForAutoconfiguration(FormTypeInterface::class) $container->registerForAutoconfiguration(EventSubscriberInterface::class) $container->registerForAutoconfiguration(ResetInterface::class) $container->registerForAutoconfiguration(MessageHandlerInterface::class) // ...
15. @nicolasgrekas FrameworkBundle's FrameworkExtension $container->registerAttributeForAutoconfiguration(AsEventListener::class, ...) $container->registerAttributeForAutoconfiguration(AsController::class, ...) $container->registerAttributeForAutoconfiguration(AsRemoteEventConsumer::class, ...) $container->registerAttributeForAutoconfiguration(AsMessageHandler::class, ...) $container->registerAttributeForAutoconfiguration(AsSchedule::class, ...) // ...
16. @nicolasgrekas Just Enjoy on your side #[AsEventListener] class MyRequestListener { public function __invoke(RequestEvent $event): void { // ... } }
17. @nicolasgrekas #[AutoconfigureTag] interface ChannelInterface { } Define your rules
18. @nicolasgrekas Enjoy your rules class ChannelBroadcaster { public function __construct( #[AutowireIterator(ChannelInterface::class)] iterable $channels ) { // ... }
19. @nicolasgrekas #[AsAlias(ChannelInterface::class)] class DefaultChannel implements ChannelInterface {
20. 🧙‍♀️ Dependency Injection #[AsDecorator] #[AsTaggedItem] #[AutowireCallable] #[AutowireDecorated] #[AutowireLocator] #[AutowireServiceClosure] #[Exclude] #[Required] #[SubscribedService] #[Target] #[When] @nicolasgrekas
21. @nicolasgrekas #[Autoconfigure(lazy: true)] class PlotFactory { public function __construct( #[Autowire(param: 'kernel.debug')] private bool $debug, private HeavyDependency $heavyDependency, ) { } }
22. public function __construct( #[AutowireLocator([ 'router' => RouterInterface::class, 'slugger' => '?'.SluggerInterface::class, ])] ContainerInterface $container, )
23. @nicolasgrekas public function __construct( #[AutowireCallable(UriTemplate::class, 'expand')] UriExpanderInterface $expander, ) new class($uriTemplate->expand(...)) implements UriExpanderInterface { public function __construct( private \Closure $closure, ) { } public function expand(string $url, array $vars): string { return $this->closure->__invoke($url, $vars); } } $uriTemplate->expand(...)
24. 🕹️ Controllers #[CurrentUser] #[MapDateTime] #[MapEntity] #[MapQueryParameter] #[MapQueryString] #[MapRequestPayload] #[ValueResolver] @nicolasgrekas
25. @nicolasgrekas #[Route('/blog')] public function blog( #[MapQueryParameter] int $page = 1, )
26. @nicolasgrekas #[Route('/product-review', methods: ['POST'])] public function post( #[MapRequestPayload] ProductReviewDto $productReview, )
27. @nicolasgrekas class ProductReviewDto { public function __construct( #[Assert\NotBlank] #[Assert\Length(min: 10, max: 500)] public readonly string $comment, #[Assert\GreaterThanOrEqual(1)] #[Assert\LessThanOrEqual(5)] public readonly int $rating, ) { // ...
28. 🛡️ Validation #[NoSuspiciousCharacters] #[NotCompromisedPassword] #[PasswordStrength] @nicolasgrekas
29. What's next? 💡 @nicolasgrekas
30. ⛓ Contracts? #[Deprecated]? #[Internal]? #[Final]? @nicolasgrekas
31. 🔧 Config? #[AutowireHttpClient(base_uri: etc.)]? @nicolasgrekas
32. Credits ♥ @nicolasgrekas
33. Hundreds of contributors @nicolasgrekas
34. Backers for 6.3 @nicolasgrekas symfony.com/sponsor
35. symfony.com/slack Mutual aid Kindness CARE team @nicolasgrekas
36. Thank you and see you soon! Online: