FuelPHP Forums

Hello.
There are 3 models "User",  "Computer", and "OS".
"Computer" related to "User" By user_id, and it has "os_id" to join "OS".
I wont to (soft) delete a "Computer" record.

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"Computer" =[ many : 1 ]=> "User"
"Computer" =[ 1:1 ]=> "OS"

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<Model Computer>
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class Model_Computer extends \Orm\Model_Soft {

    protected static $_soft_delete = array(
        'deleted_field' => 'delete_time',
    );

    protected static $_belongs_to = array(
        'user' => array(
            'model_to' => 'Model_User',
            'key_from' => 'user_id',
            'key_to' => 'id',
            'cascade_save' => false,
            'cascade_delete' => false
        ),
    );


    protected static $_has_one = array(
        'os' => array(
            'model_to' => 'Model_Os',
            'key_from' => 'os_id',
            'key_to' => 'id',
            'cascade_save' => false,
            'cascade_delete' => false
        ),
    );
}

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<Controller>
------------------------------------------------------
function action_delete($id=null)
{

// $id is a GEP parameter, user can set as he(she) want.
// Restrict deletable scope to login admin shop data only.
$shop_id = $login_admin->get_shop_id();

$computer = Model_Computer::query()
                      ->related('user', array(
                                                     'where' => array(
                                                           array('user.shop_id', '=' $shop_id;)
                                                     )
                                                 )

                        )
                       ->get_one();

$computer->delete();

}

------------------------------------------------------
<Result>
------------------------------------------------------

Fuel\Core\FuelException [ Error ]: Primary key on model Model_Os cannot be changed.
PKGPATH/orm/classes/model.php @ line 1131

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I did't set "os" ORM query builder "related".
What's wrong?
please help me...