Rails - Jan 2007 - observe_field(s) on a set of radio_button

Hi All


	I have a form in which there are ...

- a text entry
- a set of radio buttons
and
- a select (menu drop down thing)

	When one of the radio button is selected the ''select / menu drop
down''
is updated.   I''m using an ''observe_field'' - one for
each radio_button.
  Everything is working fine - except it only works for one selection
per radio button.  Once a specific radio button has been selected - the
''ajax updating'' of the ''select / menu drop
down'' stops working as a
result of the method in the control not being called.

	There is a succinct description of the problem - here ....
http://www.thoughtstoblog.com/articles/2006/10/27/observe_field-with-radio-buttons

        With respect to the ''thoughtstoblog'' post - I
don''t understand
what is being proposed as solution .

        I''ve also seen some references to workarounds on this listserv
- but to be honest, I''m a bit confused as to what exactly is being
proposed.  If its not already obvious - I''m new to Rails.

       Any help/tips/pointers/references would be greatly appreciated

Thanks
Dave

p.s.	For the sake of completeness - here are some code snippets.


	Note:  FWIW -adding '':on => ''click'' as an option
to ''observe_field''
doesn''t help

[view]

		Select your service type:
		<p><%= radio_button :lineup, :choice, "cab", :id =>
"cab_id" %>
Cable</p>
		<p><%= radio_button :lineup, :choice, "sat", :id =>
"sat_id" %>
Satellite</p>
		<p><%= radio_button :lineup, :choice, "ant", :id =>
"ant_id" %>
Rabbit Ears</p>
		<%= observe_field ''cab_id'',
		                :update 		=> "ajaxWrapper",
				:url 			=> {:action => ''getprovider''},
				:with		=> ''selectedlineup''
		%>

		<%= observe_field ''sat_id'',
		                :update 		=> "ajaxWrapper",
				:url 			=> {:action => ''getprovider''},
				:with		=> ''selectedlineup''
		%>

		<%= observe_field ''ant_id'',
		                :update 		=> "ajaxWrapper",
				:url 			=> {:action => ''getprovider''},
				:with		=> ''selectedlineup''
		%>
[controller]

  def getprovider

    @service = params[:selectedlineup]

    if @service == ''cab''
      @providers = [''cable lineups'']
    end

    if @service == ''sat''
      @providers = [''satellite lineups'']
    end

    if @service == ''ant''
      @providers = [''antenna lineups'']
    end
   
    render(:layout => false)
  end


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