Class A

test/orm/test_dynamic.py:1545–1557

        def go(passive_deletes, cascade_deletes):
            class A(decl_base):
                __tablename__ = "a"
                id: Mapped[int] = mapped_column(Identity(), primary_key=True)
                data: Mapped[str]
                bs: WriteOnlyMapped["B"] = relationship(  # noqa: F821
                    passive_deletes=passive_deletes,
                    cascade=(
                        "all, delete-orphan"
                        if cascade_deletes
                        else "save-update, merge"
                    ),
                    order_by="B.id",
                )

            class B(decl_base):
                __tablename__ = "b"