django-treebeard / treebeard /

"""Treebeard exceptions"""

class InvalidPosition(Exception):
    """Raised when passing an invalid pos value"""

class InvalidMoveToDescendant(Exception):
    """Raised when attemping to move a node to one of it's descendants."""

class MissingNodeOrderBy(Exception):
    Raised when an operation needs a missing
    :attr:`~treebeard.MP_Node.node_order_by` attribute

class PathOverflow(Exception):
    Raised when trying to add or move a node to a position where no more nodes
    can be added (see :attr:`~treebeard.MP_Node.path` and
    :attr:`~treebeard.MP_Node.alphabet` for more info)