Link to review document without corresponding assignment returns server error

[jennifer-richards]

What happened?

Crash reports came in for /doc/review-ietf-v6ops-slaac-renum-03-secdir-lc-wierenga-2020-09-24/. (This is a sandbox link - effectively the same behavior is seen on production)

The error reported on production is as follows (sandbox is the same, except with a debug message instead of an empty name keyword argument)

django.urls.exceptions.NoReverseMatch: Reverse for 'ietf.doc.views_doc.document_main' with keyword arguments '{'name': ''}' not found. 1 pattern(s) tried: ['doc/(?P<name>[A-Za-z0-9._+-]+?)(?:/(?P<rev>[0-9]{1,2}(-[0-9]{2})?))?/$']

Poking, it seems that assignments = ReviewAssignment.objects.filter(review__name=doc.name) on l.708 of views_doc.py is empty, which makes its way to review_req being None.

What browser(s) are you seeing the problem on?

Not Applicable

Code of Conduct

• I agree to follow the IETF's Code of Conduct

[rjsparks]

This is definitely a data error. Maybe code can protect itself better, but it is a violation of schema.
There are two review documents in this state at the moment, both quite old.