Views that allow sorting: sorting by a field without `asc` returns Server Error (500)
E.g. `https://debusine.debian.net/work-request/?status=pending&arch=amd64&order=task_name` returns HTTP 500. The `get_ordering` methods (in that case, `WorkRequestListView.get_ordering` requires `asc` if `order` is in the get parameter. The `get_ordering` duplicated methods should be re-factored and the fix added there.
issue