gistfile1.rb

class Users < ActiveRecord::Base

  attr_accessible(
    :nickname,
    :email
  )
  # Set password to accessor so we can validate it below.
  attr_accessor(
    :password
  )
  validates(:email, :uniqueness => true, :presence => true)
  validates(:nickname, :presence => true)
  validates(:password, :length => { :minimum => 8 })


  def authenticate(password)
    self.hash_password(params[:password]) == self.password_hash
  end

  def save
    self.salt = self.salt ||= SCrypt::Engine.generate_salt(:max_time => 1, :salt_size => 32)
    self.password_hash = hash_password(self.password, salt)
    super
  end

  private
    def hash_password(password, salt)
      SCrypt::Engine.hash_secret(password, salt)
    end

end