[BUG] FastAPI 0.137.0 breaks fastapiutils

[jkugler]

Describe the bug
Per https://fastapi.tiangolo.com/release-notes/#01370-2026-06-14 router.routes has changed, causing failure using fastapiutils. Namely, the timing module.

To Reproduce
See https://github.com/fastapiutils/fastapi-utils/blob/master/fastapi_utils/timing.py#L180

Add a timer to a route via add_timing_middleware.

From the release notes:

Now router.routes is no longer a plain list of APIRoute objects, it can contain these intermediate objects that can contain additional routers, forming a tree.

Any logic that depended on iterating on the router.routes directly would be affected, that logic cannot expect to be able to extract data from a plain list of routes, as it's no longer a plain list but a tree.

This project appears abandoned, but I thought I'd raise the issue in case someone can fix it.

[Chelovek760]

@jkugler
If u use only cbv
https://github.com/Chelovek760/fastapi-cbv

[jkugler]

@jkugler If u use only cbv https://github.com/Chelovek760/fastapi-cbv

I'm not using CBV. I'm using the timing module.

[jkugler]

There is now an API to get all the routes: fastapi/fastapi#15782