RequiredAll class

An annotation used for dependency injection that automatically injects all eligible fields into a class.

This annotation is applied at the class level. It tells the dependency injection container to inject all non-ignored fields, without requiring individual @Autowired annotations.

• Fields that are non-primitive types (classes, services, etc.) are automatically injected.
• Fields that are nullable are treated as optional.
• Primitive types like String, int, or bool are not automatically injected unless explicitly configured.

Example

@Service()
@RequiredAll()
class OrderService {
  late UserService userService;       // auto-injected
  late PaymentService paymentService; // auto-injected
  String config;                      // not injectable (primitive)

  OrderService();
}

void main() {
  print(orderService.userService);       // Injected instance
  print(orderService.paymentService);    // Injected instance
}

By default, all fields are required unless marked as nullable. This ensures strict correctness in service wiring.