I had to build my own Symfony validation bundle because no existing one fits my requirements.

UPDATE: I have completely rewritten this guide to focus on a more pragmatic approach.

My original article discussed the challenges of Symfony/OpenAPI validation, but since then, I've built a dedicated tool that solves this by using JSON Schema as the single source of truth.

You can find the improved, "no-boilerplate" version of this article here: https://dev.to/outcomer/i-built-a-symfony-bundle-that-validates-anything-and-everything-4nah