from sqlalchemy import Column from sqlalchemy import ForeignKey from sqlalchemy import Integer from sqlalchemy.ext.orderinglist import ordering_list from sqlalchemy.orm import registry from sqlalchemy.orm import relationship mapper_registry: registry = registry() @mapper_registry.mapped class A: __tablename__ = "a" id = Column(Integer, primary_key=True) # EXPECTED: Can't infer type from ORM mapped expression assigned to attribute 'parents'; please specify a Python type or Mapped[] on the left hand side. # noqa parents = relationship("A", collection_class=ordering_list("ordering")) parent_id = Column(Integer, ForeignKey("a.id")) ordering = Column(Integer) a1 = A(id=5, ordering=10) # EXPECTED_MYPY: Argument "parents" to "A" has incompatible type "List[A]"; expected "Mapped[Any]" # noqa a2 = A(parents=[a1])