Hi there,
like here: http://www.silverstripe.org/archive/show/117657 it try to use different sidebars for different Pages. I followed the example from the link, but unfortunately it´s not quite working. I´m able to choose in my admin-view the page i want to display in the sidebar, but no content is shown on the output-page.

Here is my data i used:

mysite/code/ContentPage.php

class ContentPage extends Page
{
	static $db = array();
	static $has_one = array(
		'RightSideBar' => 'Page' 
	);
	
	function getCMSFields()
	{
		$fields = parent::getCMSFields();
		$fields->addFieldToTab('Root.Content.Main', new TreeDropdownField("RightSideBar", "Rechte Sidebar anzeigen", "SiteTree"), 'Content');
		return $fields; 
	}
}
class ContentPage_Controller extends Page_Controller {
	
}

mysite/code/RightSideBar.php

class RightSideBar extends ContentPage
{
	static $db = array();
	static $has_one = array();
}
 
class RightSideBar_Controller extends ContentPage_Controller
{

}

templates/Layout/ContentPage.ss

<div id="contentleft" style="width:500px;">
		$Content
</div>
<% control RightSideBar %> 
	<div id="contentright" style="width:178px;">
		test: $Content 
	</div>
<% end_control %>

Did I forgot something important?

Thank you for your support.

Best Greetings,
Otto