Feature proposal: rerandomize seed for selected user on a selected set

[taniwallach]

Consider adding to the Instructor tools a new feature: rerandomize seed for selected user on a selected set.

Suggested by @Alex-Jordan in https://webwork.maa.org/moodle/mod/forum/post.php?reply=15043#mformforum

It would be nice to for the code to also change the psvn of the assignment also, as that can be used instead of the seed by some problems.

Maybe the set_user table could also include a notes field, which could record when this function was applied (and in the future other things.)

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Somewhat related: Consider whether it is possible for past answers database table to record the seed and psvn at the time of a submission, and to provide a manner to view the relevant version when viewing the past answers data.

[Alex-Jordan]

I'd like to make this happen (or something like this). I propose the following, welcoming requests to do it differently.

1. On the Set Detail for one User page, for each problem, have a randomize button for the seed:

You would still need to click to save changes like with any other edits here. The button would just be a handy unbiased tool to make a new seed.

2. On the Set Detail for one User page, up at the top next to the display mode select, have a button to randomize all seeds. Again it would just put random seeds in the input fields on the page, and you would still need to click the Save button.

3. On the Set Detail for multiple Users page, have a similar button to randomize all seeds for all users. It would randomize differently for each user. This time, the button actually writes new seeds to the database since you are not seeing all the seeds for all the users. That is, clicking Save is not part of the process.

4. In Instructor Tools, be able to select one or more users, with one or more sets, and there is a button to randomize all problems in all selected sets for all selected users. When you click the button, it should do the randomization, take you back to the Instructor Tools page, and give a message that the seeds were successfully reandomized.

[dlglin]

This is semi-related: currently if a problem seed is changed (either by the instructor or by the problem re-randomization feature) there is no record that this has happened. This makes looking at past answers rather meaningless since there is no way to reconstruct the version of the question to which they were associated.

At the very least the problem seed should be recorded to the past answers table. Beyond that, when viewing past answers the instructor should be able to also view the problem with that seed, but that's a separate feature request.