Currently we have methods and publish in a separate package from models. But we could also go with model-centric approach where we would put methods and publish as part of class-level model methods. Maybe we could even put views along the model.

But what about features which require combination of multiple models? Where are methods for those? And views for those?

Maybe models should have their basic views (how to edit one document, create it, display it fully, in a list, etc.), but then other features of the app should be separate in their own package, away from models.