Sandbox: Request does not get canceled when no drivers available

Current behavior on sandbox:

Create ride request (drivers available)
While status is processing, set drivers not available
Ride request status changes to no_drivers_available as expected
Set drivers back to available
Previous ride request is back to processing

I would be expecting the request to not go back to processing and rather stay on no_drivers_available. Is this a bug or is that your defined behavior? If so, could you provide more explanation?

Solution

If there is valid ride request with "processing" status - and product that was used to create this request was modified and set drivers_available to false, ride requests will terminate with the status "no_drivers_available". If product gets modified again and set drivers_available to true - ride request status will change to "processing" again - and closest available driver will be able to accept this request. So there is no "bug" in this flow - and this is expected behavior.