[michelpp]

> Is it a good idea to base your GraphQL schema on your database schema?

You don't. Hasura (and Postgraphile and PostgREST) employ in-database modeling tools called views. Views provide the same modeling abstractions that ORMs provide.

https://www.postgresql.org/docs/12/sql-createview.html

A view is a canned query with a name, and when you get down to it, all an ORM is doing is producing, usually poorly, a query from a named abstraction. Same thing. So why have two pieces in two languages when you can have one?

> Isn't the point of GraphQL to decouple your interface (who should not break) from your backend implementation details?

Views provide the same or better decoupling. They database is aware of them, they are type checked, you can't even make a view that references an unknown column, for example.