Migrating from Devise to Authentication from Scratch ala Railscasts #250

gistfile1.rb

  field :encrypted_password, :type => String
  field :email, :type => String
 
  attr_accessor :password
  validates_confirmation_of :password
  validates_presence_of :password, :on => :create, :message => "can't be blank"
  validates_presence_of :email, :message => "can't be blank"
  validates_uniqueness_of :email, :message => "already in use"

  before_create :encrypt_password

  # Password and auth stuff.
  def saved_password
    @saved_password ||= BCrypt::Password.new(encrypted_password)
  end
  def saved_password=(new_password)
    @saved_password = BCrypt::Password.create(new_password)
    self.encrypted_password = @saved_password
  end
  def encrypt_password
    saved_password = password if password.present?
  end
  def self.authenticate email, password
    user = where(:email => email).first
    if user && user.saved_password == password
      user
    else
      nil
    end
  end