public function refresh() {
		$pk = $this->model->primary_key_name();
		if ( ! isset( $this->model->{$pk} ) ) {
			return $this->model;
		}

		$model = $this->find( $this->model->{$pk}, $pk );

		if ( $model === null ) {
			$this->model->reset();
		}

		foreach ( $model->to_array() as $column => $value ) {
			$this->model->{$column} = $value;
		}
	}