[web2py] Update/insert data into multiple tables with one form

[mdmcginn]

I'm working on a variation of an opinion poll application. Maybe I
missed this, but what is the best way to update multiple tables with
one form? SQLFORM and CRUD work well, but assume that a single table
is being updated. On submit, I would like to insert the current user's
ID and his answer into one table and update the count of total answers
in another table. But I haven't come up with code to do that.