Hello everybody,
I’m having a “simple” problem but is taking me a long time to understand
and
i’ll try to do a short and a full explanation about the problem…
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/](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.
_\_
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”, “\