ORM validation

blogblog.php

<?

class Model_Blog_Blog extends ORM{

    protected $_table_name = 'blogs';


    protected $_has_many = array('images'=>array('model'=>'blog_image','foreign_key'=>'blog_id'));

     public function rules()
{
    return array(
        'title' => array(
            // Uses Valid::not_empty($value);
            array('not_empty'),
            // Calls Some_Class::some_method('param1', 'param2');
            array('max_length', array(':value', 120)),
        ),
        'body' => array(
            array('not_empty')
        )
    );
}

}

class Model_Blog_Image extends ORM{
    protected $_table_name = 'blog_images';


    protected $_belongs_to = array(
        'blog'=>array(
            'model'=>'blog_blog','foreign_key'=>'blog_id'
            )
        );
    

}

blogcontroller.php

<?

public function action_write(){
        if (HTTP_Request::POST == $this->request->method())
        {

            try
            {
                $blog = ORM::factory('blog_blog');
                $blog->values($this->request->post());
                $blog->save();

                if(!empty($_FILES)){
                    //apply images

                    foreach($_FILES as $file){
                        $img = Image::factory($file['tmp_name']);
                        $blob = $img->__toString();

                        $bimage = ORM::factory('blog_image');
                        $bimage->image = $blob;
                        $bimage->blog_id = $blog->id;
                        $bimage->save(); 
                        
                        
                    }
                }
              
            }catch(ORM_Validation_Exception $e){
                print_r($e->errors('models'));
            }
        }else{ 
            
        }
    }