Rails - Oct 2007 - Simultaneously updating multiple tables with form_remote_tag

I have two tables (Person and User) that are related as follows:

1 class Person < ActiveRecord::Base
2
3  def user
4    return User.find(:first, :conditions => ["person_id = ?",
self]
5  end
6
7  def user_name
8    return self.user.name
9  end

I wish to update them both simultaneously with form_remote_tag like
this:

1 <%= form_remote_tag(:url => {:action => ''update'',
:id => @person})%>
2     First Name: <%= text_field ''person'',
''first_name'' %></td></tr>
3     User Name: <%= text_field ''person'',
''user_name'' %></td></tr>
4     <%= submit_tag ''Save'' %>
5 <%= end_form_tag %>

with this code in the controller:

1  def update
2    @person = Person.find(params[:id])
3    if @person.update_attributes(params[:person])
4      return if request.xhr?
5      render :partial => ''info''
6    end
7  end

I''m guessing I can accomplish this by changing something in the
controller, but I''m stuck at the moment. Any ideas?
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this did it:

view:
<%= text_field "user", "name" %>

controller:
@person = Person.find(params[:id])
@person.update_attributes(params[:person])
@person.user.update_attributes(params[:user])
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