Fully-fledged "deadline extensions"

[mhecker]

Under some conditions, deadline extensions for specific students and tasks are desirable.
The current work-around, i.e.: letting the student send the solution to a tutor by email, who then submits it in lieu of the student, is unsatisfactory because the student can get no feedback whether his solution passes the public tests. It also does not scale with the number of students given deadline-extensions.

Open questions:

• how exactly should deadline extenstions be specified by the trainer?
• how shall deadline-extenstions affect the "submission date expires" -> "run all checkers" -> "tutors can start to attest" workflow?

[ifrh]

If you have a look at my pullrequest https://github.com/KITPraktomatTeam/Praktomat/pull/238/files
( #238 ) concrete to my modifications in file src/templates/solutions/solution_list.html
then as side effect it should be possible for a Trainer to upload after time out in the name of a student;
but I hadn't test this scenario.

[ifrh]

@mhecker : You asked

"how exactly should deadline extenstions be specified by the trainer?"

From point of a relational DBMS there should be (in words of Abrials min-max notation) a "Student-[0,N]-(solves)-[0,N]-Task"-relation, where the relation "solves" should have an attribute "until". The default value for "until" could be NULL. If "until" is NULL than Task.submission_date is used. If "until" is not NULL than this value overrides the submission_date limit for that tasks for that user. Yes, a Solution would be connected to relation "solves" as third but weak-entity having min and max cardinality 1. Coding that in Django we need additional view an template code.

how shall deadline-extenstions affect the "submission date expires" -> "run all checkers" -> "tutors can start to attest" workflow?

A fully fledged deadline-extenstion should make the manual selection of "run all checkers" on Task-Admin listview optional. such an extension should contain a cron-job or at-job.