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from __future__ import annotations
import typing
from sqlalchemy import ForeignKey
from sqlalchemy.orm import DeclarativeBase
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import relationship
from sqlalchemy.orm import Session
from sqlalchemy.orm import WriteOnlyMapped
class Base(DeclarativeBase):
pass
class Address(Base):
__tablename__ = "address"
id: Mapped[int] = mapped_column(primary_key=True)
user_id: Mapped[int] = mapped_column(ForeignKey("user.id"))
email_address: Mapped[str]
class User(Base):
__tablename__ = "user"
id: Mapped[int] = mapped_column(primary_key=True)
addresses: WriteOnlyMapped[Address] = relationship()
with Session() as session:
u = User()
session.add(u)
session.commit()
if typing.TYPE_CHECKING:
# EXPECTED_TYPE: WriteOnlyCollection[Address]
reveal_type(u.addresses)
address = session.scalars(
u.addresses.select().filter(Address.email_address.like("xyz"))
).one()
if typing.TYPE_CHECKING:
# EXPECTED_TYPE: Address
reveal_type(address)
u.addresses.add(Address())
u.addresses.add_all([Address(), Address()])
# this should emit an error, because __iter__ is NoReturn,
# however typing tools don't pick up on that right now
current_addresses = list(u.addresses)
u.addresses.add(Address())
session.commit()
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