Correct open answer questions

[gildasio]

Sometimes in a laboratory script, author can add questions expecting open answers from students. In this case, an automatic correction approach would be complicate. But an interesting way, in my view, would be to expect grades on these questions, given by the teacher after correction. Possibly just validate that if no answer was provided, give 0 as grade to that question, but if there is any answer, then wait for the teach to grade it.

[italovalcy]

Excellent feature request, @gildasio ! thanks for creating this issue.

Here is one suggestion:

• Modify the LabAnswers model and include two new columns comments (string) which will contain a json encoded dict similar to answers, but value of each key is a comment provided by the teacher, and grades (string) which will also be a json encoded dict also similar to answers.
• When clicking on "View answer" expand the table presented in the modal to include two new columns: comments and grades, which will populate the table columns above
• add a button to save lab answer on the modal above (which will save the two columns)
• when checking for the final grade, apply a merge approach where we consider the grade value and if grade value is empty try to get the value from answer sheet. This way, manual grades always have priority.