Migration from FastAPI and role of SQLModel

[vikigenius]

I am migrating from FastAPI and I am reading the docs. I am specifically confused about DTO objects, SQLAlchemy and how they fit in.

SQLModel despite it's bugs and issues felt like I understood what was going on. It tried to unify Pydantic Models and SQLAlchemy model
and you can thus have a single User class that would handle both the DB side and the request/response validation side?

Is that the purpose being served by something like SQLAlchemyDTO for example? In the https://github.com/litestar-org/litestar-fullstack example I see that you are still using two different User classes, one for the DB and one for the Response.