Class RootRegistry

lib/sqlalchemy/orm/path_registry.py:404–439

Root registry, defers to mappers so that paths are maintained per-root-mapper.

class RootRegistry(CreatesToken):
    """Root registry, defers to mappers so that
    paths are maintained per-root-mapper.

    """

    __slots__ = ()

    inherit_cache = True

    path = natural_path = ()
    has_entity = False
    is_aliased_class = False
    is_root = True
    is_unnatural = False

    def _getitem(
        self, entity: Any
    ) -> Union[TokenRegistry, AbstractEntityRegistry]:
        if entity in PathToken._intern:
            if TYPE_CHECKING:
                assert isinstance(entity, _StrPathToken)
            return TokenRegistry(self, PathToken._intern[entity])
        else:
            try:
                return entity._path_registry  # type: ignore
            except AttributeError:
                raise IndexError(
                    f"invalid argument for RootRegistry.__getitem__: {entity}"
                )

    def _truncate_recursive(self) -> RootRegistry:
        return self

    if not TYPE_CHECKING:
        __getitem__ = _getitem


PathRegistry.root = RootRegistry()