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import dataclasses
from sqlalchemy import select
from sqlalchemy.orm import composite
from sqlalchemy.orm import DeclarativeBase
from sqlalchemy.orm import Mapped
from sqlalchemy.orm import mapped_column
class Base(DeclarativeBase):
pass
@dataclasses.dataclass
class Point:
def __init__(self, x: int, y: int):
self.x = x
self.y = y
class Vertex(Base):
__tablename__ = "vertices"
id: Mapped[int] = mapped_column(primary_key=True)
x1: Mapped[int]
y1: Mapped[int]
x2: Mapped[int]
y2: Mapped[int]
# inferred from right hand side
start = composite(Point, "x1", "y1")
# taken from left hand side
end: Mapped[Point] = composite(Point, "x2", "y2")
v1 = Vertex(start=Point(3, 4), end=Point(5, 6))
stmt = select(Vertex).where(Vertex.start.in_([Point(3, 4)]))
# EXPECTED_TYPE: Select[Tuple[Vertex]]
reveal_type(stmt)
# EXPECTED_TYPE: composite.Point
reveal_type(v1.start)
# EXPECTED_TYPE: composite.Point
reveal_type(v1.end)
# EXPECTED_TYPE: int
reveal_type(v1.end.y)
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