This code was working before I created the update_link_list method in
the helper below (everything was in the controller). I can successfully
create a new link but I get a TypeError when I leave all form fields
blank -- I expect to see validation error messages.

Code:
#link_controller.rb:

  def create
    link = Link.new(params[:link])
    saved = link.save
    num_links = Link.find(:all).size
    num_cats = Category.find(:all).size
    if request.xhr?
      render:update do |page| page.update_link_list(link, saved, 
num_links, num_cats) end
      return
    end
    if saved
      flash[:message] = 'Link was successfully created.'
      redirect_to :action => 'list'
    else
      render :action => 'new'
    end
  end
Code:
#link_controller helper:

  def update_link_list(new_link, was_saved, num_links, num_cats)
      if was_saved
        page['listing-status'].replace_html "You've created #{num_links} 
links in #{num_cats} categories"
        page['no-links'].remove if num_links == 1 && page['no-links']
        page.insert_html :after, "category-#{new_link.category_id}", 
:partial => 'link', :object => new_link
        page.visual_effect :highlight, "link-#{new_link.id}"
        page.replace_html 'new_link_error', ''
        page['link_url'].value = 'http://'
        page['link_name'].value = ''
        page['link_description'].value = ''
      else # not saved, present error messages
        page.replace_html 'new_link_error', error_messages_for(new_link)
        page.visual_effect :appear, 'new_link_error', :duration => 0.5
        page.visual_effect :highlight, 'new_link_error', :duration => 
0.5
      end
  end
I'm receiving this error:
Code:
TypeError in Publish/linksController#create
ActionView::Helpers::JavaScriptProxy#to_str should return String
No clue how to fix this. Any ideas? Many thanks...