I have a USER model and a TAG model and they have a has_and_belongs_to
relationships between them.
I want to Tag.find(:all) ... but I only want to return tags that have
at least one association with at user.
Bonus geek points for the one who could improve on that by returning
the top 50 tags (i.e. the most associations with users) but don't
return any that do not have at least one association with a user.
(Will happen if only 30 tags in DB and only 25 have associations)
Thanks guys and gals