Overriding a parent method and making it private/protected

I'm trying to make the create method private/protected for an ActiveRecord model. I want to do something like this:

class Product < ActiveRecord::Base
  def self.create(options)
    private
    super(options)

  end
end

so that I am unable to do Product.create(...). However, I need to do this

class Pencil < Product
    def self.cre开发者_C百科ate(options)
        options["category"] = "stationary"
        super(options)
    end
end

so that I can do this Pencil.create(...). Thanks in advance!

class Product < ActiveRecord::Base
  class << self
    def create(options)
      super(options)
    end

    private :create
  end
end

class Pencil < Product
  class << self
    def create(options)
      options["category"] = "stationary"
      super(options)
    end
  end
end