Validations for booleans

I had another though for an addition in your library.
I'm sorry that i haven't had found time to fork your repo to make an example but here goes anyhow.

There should be way to validate if any of the possible options where checked.
Not sure how the syntax would be, perhaps something like validates_accepted_any :fieldname ?

And the implementation would be pretty much like @booleans_data.reject { |k, v| k.blank? || !v[1] }.any? So it would filter out any keys that are nil, or which boolean value is in FALSE_VALUES.

Dunno if this makes sense, just something i needed in one project :)

[janlelis]

Hi perfectline,

sorry, my spare time is currently pretty limited. Maybe someday ;)