Model_Box

<?php
class Model_Box extends ORM
{
    public $_belongs_to = array('product' => array());

    public function formo()
    {
        return array
        (
            'id' => array(
                'editable' => FALSE,
                'render' => FALSE,
            ),
            'product' => array(
                'orm_primary_val' => 'name',
                'editable' => FALSE
            ),
            'filename' => array(
                'driver' => 'file'
            )
        );
    }

    public function rules()
    {
        return array
        (
            'name' => array
            (
                array('not_empty')
            ),
            'product_id' => array
            (
                array('not_empty')
            )
        );
    }

    // couldn't accomplish that otherwise, don't remember why though
    // something about validation fscking up everywhere like crazy
    // (could be my mistake though)
    // this method is run in _create_passed() callback in my kohana3-crud (I already had the code up and running when you coded callbacks into formo)
    public function validate_files($form)
    {
        $valid = new Validation($_FILES);
        $valid->rules('filename', array(
            array('Upload::not_empty', NULL),
            array('Upload::type', array(':value', array('jpg','png','gif'))),
            array('Upload::size', array(':value', '4M'))
        ));

        try
        {
            $this->check($valid);
        }
        catch(ORM_Validation_Exception $e)
        {
            $errors = $e->errors();
            foreach($errors['_external'] as $field => $error)
            {
                $form->$field->error($error[0]);
            }
            return false;
        }
        return true;
    }

}