rails new typus_test_app
cd typus_test_app/
vi Gemfile 
# add rspec-rails
bundle
rails g rspec:install
rails g scaffold message title:string content:text
rake db:migrate
vi config/routes.rb 
# add root 
rm public/index.html 

# add devise to Gemfile
bundle
rails generate devise:install
# follow instructions
rails generate devise User
# leave as default setup
rake db:migrate

To require authentication for writing/creating:

app/controllers/messages_controller.rb
class MessagesController < ApplicationController
  before_filter :authenticate_user!, :except => [:show, :index]


# add typus to Gemfile
bundle
rails generate typus

rails generate typus:migration -u User
      insert  app/models/user.rb
      create  config/initializers/typus_authentication.rb
      create  config/typus/typus.yml
      create  config/typus/typus_roles.yml
   identical  app/controllers/admin/users_controller.rb
      invoke  rspec
   identical    spec/controllers/admin/users_controller_spec.rb
      create  db/migrate/20110215065356_create_users.rb



cat db/migrate/20110215065356_create_users.rb
class CreateUsers < ActiveRecord::Migration

  def self.up
    create_table :users do |t|
      t.string :first_name, :default => "", :null => false
      t.string :last_name, :default => "", :null => false
      t.string :role, :null => false
      t.string :email, :null => false
      t.boolean :status, :default => false
      t.string :token, :null => false
      t.string :salt, :null => false
      t.string :crypted_password, :null => false
      t.string :preferences
      t.timestamps
    end
    add_index :users, :email, :unique => true
  end

  def self.down
    drop_table :users
  end




SQLite3::SQLException: Cannot add a NOT NULL column with default value NULL: ALTER TABLE "users" ADD "role" varchar(255) NOT NULL


class CreateUsers < ActiveRecord::Migration

  def self.up
    add_column :users, :first_name, :string, :default => "" #, :null => false
    add_column :users, :last_name, :string, :default => "" #, :null => false
    add_column :users, :role, :string #, :null => false
    add_column :users, :status, :boolean, :default => false
    add_column :users, :token, :string #, :null => false
    add_column :users, :salt, :string #, :null => false
    add_column :users, :crypted_password, :string #, :null => false
    add_column :users, :preferences, :string
  end

  def self.down
    drop_table :users
  end

end


in the user model I had to remove the attr_accessible
  #attr_accessible :email, :password, :password_confirmation, :remember_me

WARNING: Can't mass-assign protected attributes: role, preferences

Maybe I could have opened those instead