I've got a working patch to add min_answers support to "Multiple Options" type questions for LimeSurvey 1.71. I haven't tested it thoroughly yet, however, nor ported it 1.8, nor does it support ranked questions yet (as ranked doesn't support max_answers in 1.71). As it is pretty simple, I would be happy to polish it up and do the necessary to make it work however.

If I do so, how would I go about getting this added to mainline for lime survey 1.8 or 1.9?

We are very interested in your work. Would be great if we could integrate it into the next 1.80 release.

There are two options:
a) you get the latest source code by SVN and integrate your new feature
b) you wait for the next 1.80 RC2 release (will be out next week)

Then it's best if you can support us with a diff patch so we can easily put your changes into the core.

..and some testing would be nice, too

If you have questions about the limesurvey code or how to implement new features it's always best to join the limesurvey IRC .
Our developers don't hang around in the forum much so please contact them at our IRC.

Be patient, often our developers only answer after a few minutes or the developer who can help you isn't around. In this case please try again later.

Sorry for the delayed reply, the website has been unreachable for the last few days here in Australia.

I've rebased my patch against the current svn head (presumably 1.80RC2 now, last revision was r6092. It currently only implements min_answers for multiple options questions without comments (type M) but can be easily extended to do min_answers for multiple options with comments and ranking question types.

As this is my first patch for lime survey I would be keen to get a code review if possible as well. Can this discussion here, or would the bug tracker be a better venue.

Anyway, patch is attached. I look forward to receiving your feedback.

Cheers,

fmark

Hrmf, message boards ate my attachment (doesn't like ".diff" files), trying again as a ".txt" file.

-fmark

Please open a ticket in the bugtracker and attach your .diff-file there - the forum isn't the right place for such things - THX for your work!