With traits, structural typing and #akka, #scala is doing this right.

This seems to be in direct conflict with “encapsulate behavior, not just state” and always side with Uncle Bob.

I love the idea of these simple objects that have all sorts of business relevant methods for state manipulation but I can never seem to get it to work in reality. To do any sort of complex validation the database ends up being involved and if you are using a data access object pattern there is no way too easily reference it in your data objects.

I’ve been reading more and more on SOLID. This seems to be the best, straight forward rundown of it yet, with great motivational posters to boot.