DMZ 1.7.1 (DataMapper OverZealous Edition)

[eluser]introvert[/eluser]
Hi.

I'm doing self-relationship on a Group model.

Group can have a parent group (one-to-one relation) and has field name parent_id, which represents the group's parent.

I read the documentation and I'm unsure how to set this up.

Thats what I did:

Code:

class Group extends DataMapper {

    var $has_one = array('group');

    var $validation = array(
        'name' => array(
            'label' => 'Name',
            'rules' => array('required')
        ),
        'parent_id' => array(
            'label' => 'Parent Group',
                'class' => 'group',
                  'other_field' => 'group'
        )
    );
}

How should I set this?

I also want to be able to show form select lists with htmlform DMZ extension (so that all groups would list) and thats how I currently render the html form, but it won't show the list properly:

Code:

$form_fields = array(
            'id', // Hidden id field
            'name',
            'parent_id' => array(
                'list' => $groups
                )
);
$this->load->view('groups/edit', array('group' => $group, 'form_fields' => $form_fields, 'url' => $url));

What am I doing wrong?

Many thanks in advance.