Change minimum password length with restful_authentication

Question

Is there a way to change the minimum length for passwords with restful_authentication? Currently it's 6 characters and I need another value.

I've tried calling validates_length_of before and after Authentication::ByPassword like this

validates_length_of :password, :within => 4..40, :if => :password_required?  
include Authentication::ByPassword

and like this:

include Authentication::ByPassword
validates_length_of :password, :within => 4..40, :if => :password_required?  

but the minimum password remained at 6.

Answer 1

go to vendor/plugins/restful-authentication/lib/authentication/by_password.rb and edit this string

validates_length_of :password, :within => 6..40, :if => :password_required?

Answer 2

ActsAsAuthentic has configuration options like so:

acts_as_authentic do |config|
  config.merge_validates_length_of_password_field_options       :within => 4..40
  config.merge_validates_confirmation_of_password_field_options :within => 4..40
end

Unfortunately, RestfulAuthentication doesn't have these configuration options. The right solution would be to fork the RestfulAuthentication project and add them.

In the mean time, you could monkey-patch Authentication::ByPassword.included:

# in app/models/user.rb:
Authentication::ByPassword.class_eval do
  def self.included(base)
    recipient.extend(ModelClassMethods)
    recipient.class_eval do
      include ModelInstanceMethods

      # Virtual attribute for the unencrypted password
      attr_accessor :password
      validates_presence_of :password, :if => :password_required?
      validates_presence_of :password_confirmation, :if => :password_required?
      validates_confirmation_of :password, :if => :password_required?
      validates_length_of :password, :within => 4..40, :if => :password_required?
      before_save :encrypt_password
    end
  end
end