hi

i don't know how to explain so i will say everything from start:

polish => english translation:
Obiekty > Object
Strona > Page

my ObcjecPage.php to adding objects

class ObiektyPage extends Strona {
   	static $db = array(
                'Text' => 'text',
   		'Lat' => 'Varchar(50)',
   		'Lng' => 'Varchar(50)'
   	);
   	
   	static $has_one = array(
   	);

	function getCMSFields() {
		$fields = parent::getCMSFields();
		$fields->addFieldToTab("Root.Content.Main", new TextareaField("Text", "Text:",4),"Content");
		$fields->addFieldToTab("Root.Content.coordinates", new TextField("Lat", "Lat:"));
		$fields->addFieldToTab("Root.Content.coordinates", new TextField("Lng", "Lng:"));
		
		return $fields;
	}
   	   
}



class ObiektyPage_Controller extends Strona_Controller {
 
}

my DataObjectManager

class Obiekty extends DataObject
{
	static $db = array (
		'Nazwa' => 'Text',
		'Obiekt' => 'Text'
	);
	
	static $has_one = array (
		'TrasyPage' => 'TrasyPage'
	);
			
	public function getCMSFields_forPopup() {
	  
   		$stuff = DataObject::get("ObiektyPage");
      		$map = $stuff? $stuff->toDropdownMap():array();
	  	
		return new FieldSet(
			new TextField('Nazwa'),
			new DropdownField('Obiekt','Obiekt',$map)	
		);
	}
}

and now when i add Object to the TrasaPage by DropdownField i also want to get coordinates $Lat and $Lng of chosed object but i don't know how