overwrite update_with_password

gistfile1.rb

  # in User model

  def update_with_password(params={})
    unless params.key?(:current_password)
      if params[:password].blank?
        params.delete(:password)
        params.delete(:password_confirmation) if params[:password_confirmation].blank?
      end
      
      update_attributes(params)
    else
      super
    end
  end