# new migration XXX_add_active_to_users.rb
  class AddActiveToUsers < ActiveRecord::Migration
    def self.up
      add_column :users, :active, :boolean, :default => false, :null => false
    end
 
    def self.down
      remove_column :users, :active
    end
  end

  # added to user.rb
  attr_accessible :login, :email, :password, :password_confirmation, :openid_identifier
 
  def active?
    active
  end

  # new file app/controllers/activations_controller.rb
  class ActivationsController < ApplicationController
    before_filter :require_no_user, :only => [:new, :create]
 
    def new
      @user = User.find_using_perishable_token(params[:activation_code], 1.week) || (raise Exception)
      raise Exception if @user.active?
    end
 
    def create
      @user = User.find(params[:id])
 
      raise Exception if @user.active?
 
      if @user.activate!
        @user.deliver_activation_confirmation!
        redirect_to account_url
      else
        render :action => :new
      end
    end
 
  end

  # added to user.rb
  def activate!
    self.active = true
    save
  end

  # added to app/models/user.rb
  def deliver_activation_instructions!
    reset_perishable_token!
    Notifier.deliver_activation_instructions(self)
  end
 
  def deliver_activation_confirmation!
    reset_perishable_token!
    Notifier.deliver_activation_confirmation(self)
  end
 
  # added to app/models/notifier.rb
  def activation_instructions(user)
    subject       "Activation Instructions"
    from          "Binary Logic Notifier <noreply@binarylogic.com>"
    recipients    user.email
    sent_on       Time.now
    body          :account_activation_url => register_url(user.perishable_token)
  end
 
  def activation_confirmation(user)
    subject       "Activation Complete"
    from          "Binary Logic Notifier <noreply@binarylogic.com>"
    recipients    user.email
    sent_on       Time.now
    body          :root_url => root_url
  end
 
  # added to config/routes.rb
  map.register '/register/:activation_code', :controller => 'activations', :action => 'new'
  map.activate '/activate/:id', :controller => 'activations', :action => 'create'
 
  <!-- new file app/views/notifier/activation_instructions.erb --> 
  Thank you for creating an account! Click the url below to activate your account!
 
  <%= @account_activation_url %>
 
  If the above URL does not work try copying and pasting it into your browser. If you continue to have problem, please feel free to contact us.
 
  <!-- new file app/views/notifier/activation_confirmation.erb -->
  Your account has been activated.
 
  <%= @root_url %>
 
  If the above URL does not work try copying and pasting it into your browser. If you continue to have problem, please feel free to contact us.

  # modified app/controllers/users_controller.rb
  def create
    @user = User.new(params[:user])
 
    # Saving without session maintenance to skip
    # auto-login which can't happen here because
    # the User has not yet been activated
    if @user.save_without_session_maintenance
      @user.deliver_activation_instructions!
      flash[:notice] = "Your account has been created. Please check your e-mail for your account activation instructions!"
      redirect_to root_url
    else
      render :action => :new
    end
  end

  <!-- new file app/views/activations/new.html.erb -->
 
  <h1>Activate your account</h1>
 
  <% form_for @user, :url => activate_path(@user.id), :html => { :method => :post } do |f| %>
  	<%= f.error_messages %>
  	<%= f.submit "Activate" %>
  <% end %>

  # modified user.rb
  # For authlogic 2.0+
  acts_as_authentic do |c|
    c.validates_length_of_password_field_options = {:on => :update, :minimum => 4, :if => :has_no_credentials?}
    c.validates_length_of_password_confirmation_field_options = {:on => :update, :minimum => 4, :if => :has_no_credentials?}
  end
 
  # Pre-authlogic 2.0
  # acts_as_authentic :login_field_validation_options => { :if => :openid_identifier_blank? },
  #                   :password_field_validation_options => { :if => :openid_identifier_blank? },
  #                   :password_field_validates_length_of_options => { :on => :update, :if => :has_no_credentials? }
 
  # ...
  # we need to make sure that either a password or openid gets set
  # when the user activates his account
  def has_no_credentials?
    self.crypted_password.blank? && self.openid_identifier.blank?
  end
 
  # ...
  # now let's define a couple of methods in the user model. The first
  # will take care of setting any data that you want to happen at signup
  # (aka before activation)
  def signup!(params)
    self.login = params[:user][:login]
    self.email = params[:user][:email]
    save_without_session_maintenance
  end
 
  # the second will take care of setting any data that you want to happen
  # at activation. at the very least this will be setting active to true
  # and setting a pass, openid, or both.
  def activate!(params)
    self.active = true
    self.password = params[:user][:password]
    self.password_confirmation = params[:user][:password_confirmation]
    self.openid_identifier = params[:user][:openid_identifier]
    save
  end
 
  # modified activations_controller.rb
  def create
    @user = User.find(params[:id])
 
    raise Exception if @user.active?
 
    if @user.activate!(params)
      @user.deliver_activation_confirmation!
      flash[:notice] = "Your account has been activated."
      redirect_to account_url
    else
      render :action => :new
    end
  end
 
  # modified users_controller.rb
  def create
    @user = User.new
 
    if @user.signup!(params)
      @user.deliver_activation_instructions!
      flash[:notice] = "Your account has been created. Please check your e-mail for your account activation instructions!"
      redirect_to root_url
    else
      render :action => :new
    end
  end

  <!-- modified app/views/activations/new.html.erb -->
  <h1>Activate your account</h1>
 
  <% form_for @user, :url => activate_path(@user.id), :html => { :method => :post } do |form| %>
  	<%= form.error_messages %>
  	<%= render :partial => "form", :locals => { :form => form }%>
  	<%= form.submit "Activate" %>
  <% end %>
 
  <!-- new file app/views/activations/_form.html.erb -->
  <%= form.label :password, "Set your password" %><br />
  <%= form.password_field :password %><br />
  <br />
  <%= form.label :password_confirmation %><br />
  <%= form.password_field :password_confirmation %><br />
  <br />
  <%= form.label :openid_identifier, "Or use OpenID instead of your email / password" %><br />
  <%= form.text_field :openid_identifier %><br />