booting rails

I need to use an activerecord model in a ruby script that is run from
outside rails, so I need to boot rails from my script, otherwise I
uninitialized constant ActiveRecord
I tried adding
require 'config/boot'
to the script to boot rails before running the script, but that did
not help..

To load the full rails environment you need to require config/
environment (you might want to investigate script/runner)