Related and FWIW: I checked all solutions in this space and I stuck with type-graphql which is not only an amazing lib but offers a clean architecture:

Decorated Typescript types as classes dictate the GraphQL schema and the DB model (either through further decorator libs or custom solutions). So, you end up with only one source of truth + stay DRY + very low level of abstractions. There is some debate around the right approach but I much prefer this approach over the others such as DB-model-first (Hasura) or Prisma 2 which I remember has its own DSL for modeling data.