gistfile1.rb

class UserLevels < ActiveRecord::Base
  has_many :users
end

class User < ActiveRecord::Base
  acts_as_authentic
  has_many :posts
  belongs_to :user_level
end

class UsersController < ApplicationController
 def index
    @users = User.all
  end
end

view

<% for user in @users %>
<%=debug(user.user_level)%>
<%end %>