Missing default value can lead to AttributeError

[oxesoft]

Using getattr without a default value or validation can raise an AttributeError if order_by contains an invalid attribute name. Providing a default (like self.model.id) makes the query more robust.

        column = getattr(self.model, order_by, self.model.id) if order_by else self.model.id

Originally posted by @gemini-code-assist[bot] in #318 (comment)