from __future__ import annotations
from onegov.pay import InvoiceItem
from sqlalchemy import ForeignKey
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import Mapped
from uuid import UUID
from typing import TYPE_CHECKING
if TYPE_CHECKING:
from onegov.ticket.models import TicketInvoice
[docs]
class TicketInvoiceItem(InvoiceItem):
""" An invoice item related to a ticket. """
[docs]
__mapper_args__ = {
'polymorphic_identity': 'ticket'
}
#: the submission, if the item is related to a form submission
[docs]
submission_id: Mapped[UUID | None] = mapped_column(
ForeignKey('submissions.id'),
index=True
)
# NOTE: We would like to use ForeignKey here as well, however due to
# the different base classes between libres and onegov, we can't
# have a foreign key constraint between those two worlds (at least
# not without considerable additional effort)
#: the reservation if the item is related to a reservation
[docs]
reservation_id: Mapped[int | None] = mapped_column(index=True)
if TYPE_CHECKING:
[docs]
invoice: Mapped[TicketInvoice]