Flutter Layer-based Clean Architecture + DDD

You enforce clean architecture in a Flutter app by separating code into distinct Domain, Infrastructure, Application, and Presentation layers. This approach prevents mixed responsibilities and ensures dependencies flow strictly inwards towards the Domain layer.

Structure domain entities and error handling in Flutter DDD by using @freezed classes for immutability. You must implement functional error handling, mandating Either<Failure, Success> return types for repository interfaces to manage failures predictably.

The correct dependency flow for a Flutter layer-based architecture is strictly inwards: Presentation depends on Application, which depends on Domain, while Infrastructure also depends on Domain. This inversion ensures the Domain layer remains independent of external concerns.

Yes, Flutter clean architecture works for complex mobile development projects by enforcing strict DDD principles and separation of concerns. It provides a robust pattern that reduces bugs and simplifies maintenance as the application's scale grows.

You apply DDD standards to an existing Flutter project by enforcing the architectural rules directly onto the project's lib directory. This governs the implementation of domain entities, infrastructure, application logic, and presentation layers.

Your Flutter architecture has mixed responsibilities because it lacks a strict layer-based clean architecture. Implementing DDD principles forces dependencies to flow inwards and separates domain logic from infrastructure and presentation concerns.