Odmantic Does Not Add Pydantic Computed Fields to MongoDB about odmantic

[ltieman]

I'd propose the following change to the engine._save method

async def _save(
        self, instance: ModelType, session: "AsyncIOMotorClientSession"
    ) -> ModelType:
        """Perform an atomic save operation in the specified session"""
        for ref_field_name in instance.__references__:
            sub_instance = cast(Model, getattr(instance, ref_field_name))
            await self._save(sub_instance, session)

        fields_to_update = instance.__fields_modified__ | instance.__mutable_fields__ | {ODMBaseField(key,instance.model_config) for key, value in instance.model_computed_fields.items() if value.repr}
        if len(fields_to_update) > 0:
            doc = instance.model_dump_doc(include=fields_to_update)
            collection = self.get_collection(type(instance))
            try:
                await collection.update_one(
                    instance.model_dump_doc(include={instance.__primary_field__}),
                    {"$set": doc},
                    upsert=True,
                    session=session,
                )
            except pymongo.errors.DuplicateKeyError as e:
                raise DuplicateKeyError(instance, e)
            object.__setattr__(instance, "__fields_modified__", set())
        return instance

[Oliversinn]

I support this change, I am facing the same issue.