using libraries in models

[eluser]Seppo[/eluser]
Oh oh I got it! =)
Are you autoloading the model and loading the library in your constructor? If that's so that's the problem... my code example

The autoload config

Code:

$autoload['model'] = array('testmodel');

The testmodel model

Code:

<?php
class Testmodel extends Model {
    function Testmodel()
    {
        parent::Model();
        $this->do_test();
    }

    function do_test()
    {
        $this->load->library('validation');
        $this->validation->set_fields(array('a' => 'a'));
    }
}
?>