JDBC for Spring WebFlux: Spring Data R2DBC
Disclaimer: The project is still in experiment mode, do not use it in production.
Sample project on GitHub:
Deeply nested data – or components – will always be a source of trouble at one point. It depends of the use case of course, but I usually put efforts to keep the datas’ schemas reasonably flat, with a good naming it’s clearer and more flexible in my opinion.