rails/rails — pull request #3971 by Antiarchitect (2011-12-13 21:56:14+00:00)
Title: Hack for Range class to perfom Arel not_in predication on ranges.

I was pissed off because of lack of way to gracefully point that values should be NOT IN and NOT BETWEEN in conditions like this:
User.where(:id => 1..3)
Now there is such a way (almost for ranges for now):
User.where(:id => (1..3).out!)

I don't know how this should be implemeted but I have AS IS implementation of it.