gistfile1.txt

    protected function create_or_update_tag($tag, $post)
    {   
        // Check
        if (isset($post['parent']))
        {   
            // If we have a parent array with url/id
            if (is_array($post['parent']) AND isset($post['parent']['id']))
            {   
                $post['parent_id'] = $post['parent']['id'];
            }   
            // If parent is numeric, assume its an id
            elseif (Valid::numeric($post['parent']))
            {   
                $post['parent_id'] = $post['parent'];
            }   
            else
            {   
                // Try to find parent by slug
                $parent = ORM::factory('Tag', array('slug' => $post['parent']));
                if ($parent->loaded())
                {   
                    $post['parent_id'] = $parent->id;
                }   
            }   
        } 
        
        $tag->values($post, array(
            'tag', 'slug', 'type', 'parent_id', 'priority', 'color', 'icon', 'description', 'role'
            )); 

        // Validation - cycle through nested models
        // and perform in-model validation before
        // saving
        try 
        {   
            // Validate base form data
            $tag->check();

            $tag->save();

            // Response is the complete form
            $this->_response_payload = $tag->for_api();
            $this->_response_payload['allowed_methods'] = $this->_allowed_methods();
        }   
        catch (ORM_Validation_Exception $e) 
        {   
            throw new HTTP_Exception_400('Validation Error: \':errors\'', array(
                ':errors' => implode(', ', Arr::flatten($e->errors('models'))),
            )); 
        }   
    }   
}