I have a Rails 3 application with a User class, and a tab-delimited file of users that I want to import.

How do I get access to the Active Record model outside the rails console, so that I can write a script to do

```
require "???active-record???"

File.open("users.txt", "r").each do |line|
    name, age, profession = line.strip.split("\t")
    u = User.new(:name => name, :age => age, :profession => profession)
    u.save
end

```

Do I use the "ar-extensions" gem, or is there another way? (I don't particularly care about speed right now, I just want something simple.)