Awaiting `Model.bulk_create` on a list of objects returns None and also does not fill the `id` field of the list items!

[922tech]

When you await Model.bulk_create on a list of objects it does not add the id fields for the objects.
And this is so lame that I account it as a bug not a feature request!

Sample code:

        accounts = []
        fake = Faker()

        kwargs_dict = dict(
            proxy=fake.random_int(min=1000, max=9999),
            color=fake.random_int(min=0, max=16777215),  # RGB range
            screen_resolution=fake.random_int(min=720, max=2160),
            profile=fake.random_int(min=1, max=1000),
            category=category,
            secret_key=fake.uuid4(),
            username=fake.user_name(),
            password=fake.password(),
            name=fake.name(),
            bio=fake.sentence(nb_words=10),
            email=fake.email(),
            profile_pic_url=fake.image_url(),
            instagram_state=fake.random_element(elements=["active", "inactive", "banned"]),
            app_state=fake.random_element(elements=["idle", "busy"]),
            avatar_changed=fake.random_int(min=0, max=1),
            username_changed=fake.random_int(min=0, max=1),
            initial_posts_deleted=fake.random_int(min=0, max=1),
            has_enough_posts=fake.random_int(min=0, max=1),
            is_used=fake.random_int(min=0, max=1),
            is_active=fake.random_int(min=0, max=1),
            is_public=fake.random_int(min=0, max=1),
            web_session=fake.uuid4(),
            mobile_session=fake.uuid4(),
            log=fake.text(max_nb_chars=200),
            updated_at=datetime.now(),
            next_login=datetime.now(),
        )
        accounts.append(Account(**kwargs_dict))

        t = Account.bulk_create(accounts, 10, True)   # t is None
        # accounts[0].id is also None

[Chr0nos]

i have the very same problem: i'm the author of tortoise-serializer and to populate my backward foreignkeys relations i'm still forced to create the instances one by one here ( https://github.com/Chr0nos/tortoise_serializer/blob/master/tortoise_serializer/serializers.py#L789 )
without even being able to use something like asyncio.gather or a taskgroup because in this context i'm most likely inside a transaction context, the fact that this method returns None is fine to me BUT it should populate the instances with the Model._meta.generated_db_fields, all of them, otherwise sure this bulk_create method is "fast" but actually useless

to me it's a major bug of tortoise-orm that need to be addressed

so far all i know is the bug is near BulkCreateQuery object, in it's _make_queries method it generate the "RETURNING id" part of the query but self._db.execute_many part doesn't seems to honor that