gistfile1.rb

# I'm trying to setup some attributes on a newly created page instance
# that was created through a association

# page = Page.first
# page.site # => 'mysite'
# new_page = page.children.create
# new_page.site # => 'mysite'

class Page < ActiveRecord::Base

  has_many :children, :class_name => 'Page', :foreign_key => :parent_id do
    def create(*args)
      returning super do |new_page|
        # proxy_owner is what I was looking for
        new_page.site = proxy_owner.site
      end
    end
  end
  
end

# Is this the right aproach?