hey, you might want to check xgenecloud where it is seamless to add business logic for generated APIs.

XgeneCloud makes it really simple to add business logic for generated APIs (REST and GraphQL both) over any SQL databases.

We just launched this week [2]

[1] : https://github.com/xgenecloud/xgenecloud

[2] : https://news.ycombinator.com/item?id=23466782

Website : https://xgenecloud.com

(disclaimer: founder here)