For a single object :

http://www.vspalvelut.fi/katsetus/korterid/show/1

You might want to try this for your controller:

Sorry, I'm not gonna code it for you and I can't explain it easier then I did....

Please take some time for the tutorials I posted earlier. You will gather much more knowledge from it and will write better code in the end...

Also make sure you read this to debug you website:

http://doc.silverstripe.org/debugging

And fresh from the press:

http://www.leftandmain.com/silverstripe-tips/2010/09/08/8-common-silverstripe-errors-explained-and-solved/

Hope this helps.

is there a way to add in function:

/**
* In template
* <% if Objekt %>
* <% control Objekt %>
* $Objektinimi
* $Kirjeldus
* <% end_control %>
* <% end_if %>
*
*/
function show(){
return array();
}

function Objekt(){
if(isset($this->request) && $this->request->param('ID')){
return DataObject::get_by_id('Objekt', (int)$this->request->param('ID'));
}
}

the theme .ss file what the objekt.ss dataobject uses

so that if i use nimekiri i use nimiekiri.ss and if i wanna see the more info about the dataobjects listed on nimekiri.ss i use the theme named objekt.ss

in this function it shows the same in mysite.com/nimekiri/ and mysite.com/nimekiri/show/1 (for the last i wanna use the objekt.ss template)

one more question
in searchable fields in objekt.php
what i need to add in my language file and this part of file to translate the search field

static $searchable_fields = array(
'Elamutyyp' => array(
'title' => 'the translation code',
'filter' => 'ExactMatchFilter',
),