Hi!
In my view i have remote_form_for and action in controller:
def save_offer_basics
@offer = Offer.new params[:offer_basics]
@offer.user_id = current_user.id
@offer.enable_validation_group :offer_basic
render :update do |page|
if @offer.valid?
@offer.save
flash[:notice] = 'Podstawowe dane oferty zosta³y zapisane!
Kolejnym krokiem jest wybranie kategorii.’
page[:mdiv].replace_html message_block(:on => [:offer])
page[:offer_basics_id].value = @offer.id
else
page[:mdiv].replace_html message_block(:on => [:offer])
end
page[:mdiv].show
end
end
Unfortunetly it never saves. When i debug code with netbeans it stops
on line render :update do |page| with exception:
undefined method `class_eval’ for
#<ActionView::Helpers::PrototypeHelper::JavaScriptGenerator:
0xb5f0165c>
with trace
<div id="Application-Trace" style="display: block;">
<pre><code>vendor/plugins/validationgroup/lib/
validation_group.rb:7:in extended' /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/ prototype_helper.rb:587:inext
end’
/usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/
prototype_helper.rb:587:in inc lude_helpers_from_context' /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/ prototype_helper.rb:586:ineac
h’
/usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/
prototype_helper.rb:586:in inc lude_helpers_from_context' /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_view/helpers/ prototype_helper.rb:580:inini
tialize’
/usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/
base.rb:917:in new' /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/ base.rb:917:inrender_with_no_la
yout’
/usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/
layout.rb:259:in render_without_ benchmark' /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/ benchmarking.rb:51:inrender’
/usr/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/
core_ext/benchmark.rb:8:in realt ime' /usr/lib/ruby/gems/1.8/gems/actionpack-2.1.1/lib/action_controller/ benchmarking.rb:51:inrender’
app/controllers/offer/create_controller.rb:31:in `save_offer_basics’
Thanks for any help 
Adrian