在Django REST Framework中更新图像字段

Question

我正在尝试使用Django Rest Framework更新图像字段。我覆盖了views.py中的更新方法。由于我正在进行批量更新，所以这就是为什么我使用了for循环并尝试更新每个字段的原因。问题是我不知道如何手动更新图像字段。因此，任何想法或建议都会有所帮助。

    def update(self, request, *args, **kwargs):
        instance = self.get_object()   
        response_data = { "kitchen_audit":[]}

        if not isinstance(request.data, dict):
            for kitchen_audit in self.request.data:
                kitchen_audit_instance = KitchenAudit.objects.get(id = kitchen_audit["id"])
                kitchen_audit_instance.marks_scored = kitchen_audit['marks_scored']
                kitchen_audit_instance.comment =  kitchen_audit['comment']
                kitchen_audit_instance.save()

                response_data["kitchen_audit"].append(
                    {'id': kitchen_audit['id'],
                    'marks_scored': kitchen_audit['marks_scored'],
                    'comment':kitchen_audit['comment']})

                for kitchen_audit_image in kitchen_audit["images"]:
                    kitchen_audit_image_instance = KitchenAuditImage.objects.get (id=kitchen_audit_image["id"])
                    kitchen_audit_image_instance["image_url"] = kitchen_audit_image['image_url']
                    kitchen_audit_image_instance.save()