slykar

from model_utils.managers import InheritanceManagerMixin, InheritanceQuerySetMixin
from treebeard.mp_tree import MP_NodeManager, MP_NodeQuerySet, MP_Node


class PolymorphicTreeQuerySet(InheritanceQuerySetMixin, MP_NodeQuerySet):
    """QuerySet combining functionality of polymorphic up-casting with Materialized Path tree structure"""


class PolymorphicTreeManager(InheritanceManagerMixin, MP_NodeManager):
    _queryset_class = PolymorphicTreeQuerySet