In Rails 3, how can I skip validation of the password field when I'm not attempting to update the password?

Question

My User model contains :name, :email, and :password fields. All 3 have validations for length. An \"update account\" web page allows the user to update his name and email

Answer 1

When password is added then only confirmation will be called and presence will call on create action only   

   **validates_presence_of :password, :on =>:create**

   **validates_confirmation_of :password**