# app\controllers\examples_controller.rb
ruby 代码
class ExamplesController < ApplicationController
def ajax_select
@items = %w{AA BB}
end
def get_sub_items
if params[:item] == "AA"
@sub_items = %w{AA1 AA2}
else
@sub_items = %w{BB1 BB2}
end
render :partial => "select"
end
end
# app\views\examples\ajax_select.rhtml
xml 代码
<%= javascript_include_tag :defaults %>
<h1>Examples#ajax_select</h1>
<p>Find me in app/views/examples/ajax_select.rhtml</p>
<%= select :obj, :att, @items, {}, :onchange => remote_function(:update => "sub_items",
:method => "get",
:with => "'item=' + value",
:url => { :controller => :examples, :action => :get_sub_items})
%>
<div id="sub_items">
<select></select>
</div>
#app\views\examples\_select.rhtml
ruby 代码
<%= select(:obj, :item
