Rails - Nov 2006 - Newbie question - ajax drop downs

How do you do ajax drop downs?  I was looking over at
http://www.roryhansen.ca/?p=9
but couldn''t get it to work properly.  I decided to try and use
form_remote, but it would submit the form instead of preformaing an ajax
call.
Since I need 2 form elemnts to preform an ajax calls, will they need to
be in seperate forms?
controller
 test_update
    @counties = County.find(:all,
        :conditions => ["state = ?", params[:state_id]])
    @html = “<select id=’county_id’ name=’county_id’>”
    @html += “<option value=''’>select county</option>”
    @counties.each do |cty|
      @html += “<option value=’#{cty.id}’>#{cty.name}</option>”
    end
    @html += “</select>”
  end
  index
    .. code to get state array, generate other stuff
  end


index.rhtml
....
<form_remote_tag :html => {
  url_for{:controller => "locator", action => test_update) }
%>
State
<select name=”state[state_id]” id=”state[state_id]”
onchange=form.submit() >
   <option value=”">Select State</option>
   <% @states.each do |state| %>
      <option value=”<%= state.id %>”>
         <%= state.name %>
      </option>
   <% end %>
</select>
<%= end_form_tag %>
County
<div id=”county_container”>
   <select name=”county[county_id]” disabled=”disabled”>
      <option value=”">Select County</option>
   </select>
</div>
City
... the next form

-- 
Posted via http://www.ruby-forum.com/.
--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

well its not as straight forward as I would have liked, but I came up 
with a solution to this problem.

Basically I created a couple partials that create a single dropdown with 
any option values inside.  Then in the index I write stubs with the same 
div ID as the dropdowns have  <div id="stateDD"></div>

I have a javascript function that submits the value of the previous drop 
down via Ajax, which queries the database for the records that should be 
in the next DD.

Then using a rjs file, I remove the stateDD div, and call the partial to 
add it back in the correct place.

There might be better ways of doing this, and I would love to hear them, 
but for now this is working.

 - NG



-- 
Posted via http://www.ruby-forum.com/.

--~--~---------~--~----~------------~-------~--~----~
 You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---