protected function setFields()
    {
        $this->set = new \stdClass();
        $schema    = $this->schema();

        foreach ($schema as $field => $type)
        {
            if (Helpers\Validate::isNumeric($type) && $field != 'id')
            {
                $this->setField($field, 0);
            }
            else
            {
                $this->setField($field, null);
            }
        }
    }