复写update方法，只更新部分字段。
def update(self, request, *args, **kwargs): instance = self.get_object() print(instance,instance.id) data=request.data.copy() data["number"] = instance.number data["workshop"] = ','.join([self.dict_roles[roles] for roles in data['roles_id']]) ser = self.serializer_class(data=data, instance=instance) if ser.is_valid(raise_exception=True): ser.save() return Response({'info': 'ok'}) else: return Response({'info': 'error'})
