no password_confirmation on create but need it during update (authlogic)

I am q开发者_JAVA技巧uite new to rails and I am using authlogic for my authentication system. I want to have password_confirmation when user updates his profile, but not when he is signing up.

I figured out this config option

acts_as_authentic do |c|
  c.require_password_confirmation=false
end

When I do this, it ignores password_confirmation during signup (which is fine) but while editing user profile, I want it to consider password_confirmation field. is there any method I can configure this?

As you have suspended the Authlogic based validation you can achieve this with a standard Rails model validation such as:

validates_presence_of :password_confirmation, :if => :password_required?

where the password_required? is an optional model method, which tests if you want this validation for a given scenario.

UPDATE

As it seems that the c.require_password_confirmation=false option means the password_confirmation attribute is no longer automatically created then you need to approach the solution slightly differently. Create a virtual attribute manually and a custom validation for the specific case of profile updates. Something like this:

class User < ActiveRecord::Base
  attr_accessor :password_confirmation

  validate do |user|
    unless user.new_record?
      user.errors.add :password, "is required" if self.password.blank?
      user.errors.add :password_confirmation, "is required" if self.password_confirmation.blank?
      user.errors.add_to_base, "Password and confirmation must match" if self.password != self.password_confirmation
    end
  end
end