def create_cart_data()

in example_app/load_local_data.py [0:0]


def create_cart_data(app, user_ids: List[str], book_ids: List[str]):
    """Create a cart for each user with 5 items in it."""
    cart_controller: CartController = app.extensions["cart_controller"]

    for user_id in user_ids:
        for _ in range(0, 5):
            c = CartItem(
                user_id=user_id,
                cart_item_id=str(uuid.uuid4()),
                item_id=random.choice(book_ids),
                item_cost=Decimal("10.99"),
                item_count=Decimal("1"),
            )

            cart_controller.put_cart_item(item=c.record)