[Rails] collection_select

Hello,

I'm trying to use collection select to implement filtering for my page.
The idea is there are a bunch of posts and I want to implement record
filtering for those.

The first collection box would have parameters like "Date", "Amount",
"Category" and based on the selection of this a secondary drop down
would appear and allow the user to make a selection. The records on this
page would be then filtered based on both the selection.

I have been trying out many things and have googled a lot on collection
but I have reached a dead end now. I'm pretty new and just started
learning ROR.

You help is much appreciated here.

Thanks in advance.

Note: the code below might be wrong and as of now its not even
compiling.. currently it complaints of "remote_function" not defined...
-----------------------------
I have a page that looks like this,

<div class="span8">

<% if @user.spendings.any? %>

<h3> Spendings (<%= @user.spendings.count %>)</h3>



<%= collection_select(:category, :category, Category.all, :id,
:name,

{:prompt => 'Select'})%>



<%= collection_select :event, :filterType, Filters.all, :id,
:filterType, {},

{

:onchange => remote_function(

:url => {:action => "updatelevel", :controller => "Spendings",
:id => 1},

:with => "'level_id='+this.value"

)}

%>



<ol class="spendings">

<%= render @spendings %>

</ol>

<%= will_paginate @spendings %>

<% end %>

</div>

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