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from __future__ import annotations
import typing
from sqlalchemy import ForeignKey
from sqlalchemy.orm import DeclarativeBase
from sqlalchemy.orm import DynamicMapped
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
from sqlalchemy.orm import relationship
from sqlalchemy.orm import Session
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: DynamicMapped[Address] = relationship(
cascade="all,delete-orphan"
)
with Session() as session:
u = User()
session.add(u)
session.commit()
if typing.TYPE_CHECKING:
# EXPECTED_TYPE: AppenderQuery[Address]
reveal_type(u.addresses)
count = u.addresses.count()
if typing.TYPE_CHECKING:
# EXPECTED_TYPE: int
reveal_type(count)
address = u.addresses.filter(Address.email_address.like("xyz")).one()
if typing.TYPE_CHECKING:
# EXPECTED_TYPE: Address
reveal_type(address)
u.addresses.append(Address())
u.addresses.extend([Address(), Address()])
current_addresses = list(u.addresses)
if typing.TYPE_CHECKING:
# EXPECTED_TYPE: list[Address]
reveal_type(current_addresses)
# can assign plain list
u.addresses = []
# or anything
u.addresses = set()
if typing.TYPE_CHECKING:
# still an AppenderQuery
# EXPECTED_TYPE: AppenderQuery[Address]
reveal_type(u.addresses)
u.addresses = {Address(), Address()}
if typing.TYPE_CHECKING:
# still an AppenderQuery
# EXPECTED_TYPE: AppenderQuery[Address]
reveal_type(u.addresses)
u.addresses.append(Address())
session.commit()
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