problem with dynamic selects using rjs

Hello everybody,

This is a simple problem and i found a lot of resources on the internet but i try for different ways and none of them worked yet. I have the normal problem with the “states and cities” selects.

But the problem is that when i select the state the on_change method is called and
then the controller is called and make the correct search on the
database and i can get the correct response at firebug but the second
select is not rendered with the new data.

I think i have some problems with routes or something like this cause the page is not rendered correct but looks like the response is for another url. i’m dont know what could be wrong.

Any help will be appreciate!

Hello again,
I’m going to try to explain better now…

I’m quite beginner at rails and i’m facing a weird problem to make a
two select boxes working dynamic. I have a table called conditions and
this table has condition_type and condition_value. I want to put in the
first select all the condition types and as an user select a type the
condition values for that type (this means all the rows that have
condition_type=selected) will be show in a second select.
So far i’m trying different approachs like railcast #88 or http://pullmonkey.com/2008/3/30/dynamic-select-boxes-ruby-on-rails/ but i dont know what is happening.
When i select the condition_type the on_change method is called and
then the controller is called and make the correct search on the
database and i can get the correct response at firebug but the second
select is not rendered with the new data.
</short explanation>

So far, my code is:
rules_controller.rb
def new
@rule = Rule.new
@condition_type = Condition.find(:all, :select => ‘DISTINCT condition_type’)
@condition_value = Condition.find(:all, :select => ‘DISTINCT condition_value’)
end
def update_condition_value
@condition_value = Condition.find(:all, :conditions => { :condition_type => params[:condition_type]})
render :action => “update_condition_value.js.rjs”
end
_form_new.html.erb
<% form_for @rule do |rule_form| %>
Name: <%= rule_form.text_field :rule_name %>
Condition type: <%= select_tag ‘condition_type[]’,
options_from_collection_for_select(@condition_type, ‘condition_type’, ‘condition_type’),
{:onchange => remote_function(:url =>
{:action => “update_condition_value”}, :with => “‘condition_type=’+value”)} %>

Condition value: <%= render :partial => ‘condition_value’%>

<%= rule_form.submit “Submit” %>
<%end%>
_condition_value.html.erb
<%= select_tag ‘condition_value’, options_from_collection_for_select(@condition_value, ‘condition_value’, ‘condition_value’)%>
update_condition_value.js.rjs
page.replace_html ‘condition_value_div’, :partial => ‘condition_value’e’)

The
problem that i’m facing is that when i select some condition_type the
on_change is activated and then they call the
update_condition_value.js.rjs and i can see from the firebug that i
receive an response like:

try {
Element.update("condition_value_div", "<select id=\"condition_value\" name=\"condition_value\"><option value=\"private\">private</option>\n<option value=\"public\">public</option></select>\n\n");

} catch (e) { alert('RJS error:\n\n' + e.toString()); alert('Element.update(\"condition_value_div\", \"<select id=\\\"condition_value\\\" name=\\\"condition_value\\\"><option value=\\\"private\\\">private</option>\\n<option value=\\\"public\\\">public</option></select>\\n\\n\");'); throw e }

as it should be… This means that they went to the controller
and make the correct call from the database as i can see at the log at
netbeans. But the problem is that the page is not rendered or any
changes occoru with the second select.

So, i can say that every step is working until the call from the
controller at update_condition_value but looks like i have an mismatch
or error at render :action => “update_condition_value.js.
rjs” call.
I think maybe could be a problem with my routes cause when i see
the log after i select something at the first select i get this:
_Processing RulesController#update_condition_value to json (for 127.0.0.1 at 2009-09-08 14:43:18) [POST]
Parameters: {“format”=>“json”, “condition_type”=>“group”, “action”=>“update_condition_value”, “controller”=>“rules”}
[4;36;1mCondition Load (0.0ms)[0m [0;1mSELECT * FROM conditions WHERE (conditions.condition_type = ‘group’)
Rendering rules/update_condition_value
[4;35;1mCondition Columns (0.4ms)[0m [0mSHOW FIELDS FROM conditions[0m
Rendered rules/condition_value (1.8ms)
Completed in 89ms (View: 2, DB: 5) | 200 OK [http://localhost/rules/update_condition_value]

and i understand that they are trying to render the content at http://localhost/rules/update_condition_value but the address that i’m using is http://localhost:3000/coreui/privacy/1/rules/new
as u can see at the routes file:

  • map.resources :rules, :path_prefix => '/coreui/privacy/:user_id'*
    

I dont know what else i should do to make this work and any help or tips will be welcome!

Thanks in advance…

</complete explanation>