gistfile1.txt

#controller


  def activate
    if @user = User.load_from_activation_token(params[:activation_token])
      @user.inactive = true
      @user.activate!
      login(@user.email, @user.password)
    else
      redirect_to login_path, :alert => 'Account has been activated already, please login'
    end
  end


#User.rb

  attr_accessor :inactive

  validates_presence_of :password, :if => :should_be_validated?

  def should_be_validated?
    inactive
  end