#Setup
Rails 3.0.0
Ruby 1.9.2
Mysql

#Model
class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :token_authenticatable, :confirmable, :lockable and :timeoutable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :email, :password, :password_confirmation, :remember_me
  has_many :sites

  def admin?
    return self.is_admin
  end
end

#Schema
  create_table "users", :force => true do |t|
    t.string   "email",                               :default => "",    :null => false
    t.string   "encrypted_password",   :limit => 128, :default => "",    :null => false
    t.string   "password_salt",                       :default => "",    :null => false
    t.string   "reset_password_token"
    t.string   "remember_token"
    t.datetime "remember_created_at"
    t.integer  "sign_in_count",                       :default => 0
    t.datetime "current_sign_in_at"
    t.datetime "last_sign_in_at"
    t.string   "current_sign_in_ip"
    t.string   "last_sign_in_ip"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.boolean  "is_admin",                            :default => false, :null => false
  end

#Controller


#Use
irb(main):001:0> user = User.create(:email => "test@test.com", :password => "testtest", :password_confirmation => "testtest", :is_admin => true)
=> #<User id: 1, email: "test@test.com", encrypted_password: "$2a$10$69uG7Q57UWwfyR.dMbt9.ed.JfFzTLScqqv6C1UG8Epn...", password_salt: "$2a$10$69uG7Q57UWwfyR.dMbt9.e", reset_password_token: nil, remember_token: nil, remember_created_at: nil, sign_in_count: 0, current_sign_in_at: nil, last_sign_in_at: nil, current_sign_in_ip: nil, last_sign_in_ip: nil, created_at: "2010-10-16 00:57:44", updated_at: "2010-10-16 00:57:44", is_admin: false>