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    <p>I finally got it! Thank you both amikazmi and Topher Fangio. I had to implement both the delegate and method_missing techniques to get this to work.</p> <p>Here is the total madness that finally ended up working for me! If anybody has suggestions on how to further improve this, I'd love to hear your suggestions.</p> <pre><code>class User &lt; ActiveRecord::Base attr_accessible *([:user_name, :udid, :password, :password_confirmation, :contact_info] + ContactInfo.accessible_attributes.to_a.map {|a| a.to_sym}) has_one :contact_info, :as =&gt; :contactable def method_missing(method_id, *args) if (!self.respond_to?(method_id) &amp;&amp; self.contact_info.respond_to?(method_id)) self.contact_info.send(method_id, *args) elsif (!self.class.respond_to?(method_id) &amp;&amp; ContactInfo.respond_to?(method_id)) ContactInfo.send(method_id, *args) else super(method_id, *args) end end # delegating attributes seems redundant with the method_missing above, but this secret sauce works. ContactInfo.accessible_attributes.to_a.each do |a| delegate a.to_sym, "#{a}=".to_sym, :to =&gt; :contact_info end def initialize(*args) options = args.extract_options! contact_attrs = ContactInfo.accessible_attributes.to_a.map{|a| a.to_sym} @ci = ContactInfo.new(options.reject {|k,v| !contact_attrs.include?(k) }) super(*(args &lt;&lt; options.reject { |k,v| contact_attrs.include?(k) }.merge(:contact_info =&gt; @ci) ) ) self.contact_info = @ci end validates_presence_of :user_name validates_uniqueness_of :user_name validates_associated :contact_info def after_save # automatically save the contact info record for the user after the user has been saved. self.contact_info.save! end end </code></pre> <hr> <pre><code>class ContactInfo &lt; ActiveRecord::Base set_table_name "contact_info" belongs_to :contactable, :polymorphic =&gt; true validates_presence_of :email validates_uniqueness_of :email attr_accessible :first_name, :last_name, :middle_initial, :title, :organization_name, :email, :email_2, :twitter_name, :website_url, :address_1, :address_2, :city, :state, :zip, :phone_work, :phone_mobile, :phone_other, :phone_other_type def full_name [self.first_name, self.last_name].compact.join(' ') end end </code></pre>
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