def add_to_cart()

in app/helpers/carts/helpers.py [0:0]


def add_to_cart(uid, item_id):
    """
    Helper function for adding an item to a cart.

    Parameters:
       uid (str): The unique ID of an user.
       item_id (str): The ID of an item.

    Output:
       None.
    """

    item = CartItem(
        uid=uid,
        item_id=item_id,
        modify_time=int(time.time()))

    firestore_client.collection('carts').document().set(asdict(item))