Nbgrader reports "needs manual grade" for assignments with no/done manual grading

[trevorcampbell]

data file to reproduce on my gdrive (memory jog for later)

[trevorcampbell]

After some debugging: this seems to happen when the student's submitted notebook doesn't contain a test cell (because they've accidentally deleted it, perhaps...). The gradebook db doesn't get a score from autograder for it, so nbgrader reports that it needs manual grading -- but because the cell is missing, the TA can't see the missing cell to assign it.

This may be a bug that nbgrader should fix itself, not rudaux. But I'm a bit surprised they don't account for this kind of issue already... More investigation needed.

[trevorcampbell]

Yes, I can reproduce this from scratch by taking the release copy of a notebook, making one of the tests become editable via metadata, then deleting the cell.

I'm going to file an issue on the nbgrader repo.

[trevorcampbell]

jupyter/nbgrader#1682