Exceptions

exception treebeard.exceptions.InvalidPosition
Raised when passing an invalid pos value
exception treebeard.exceptions.InvalidMoveToDescendant
Raised when attemping to move a node to one of it’s descendants.
exception treebeard.exceptions.PathOverflow
Raised when trying to add or move a node to a position where no more nodes can be added (see path and alphabet for more info)
exception treebeard.exceptions.MissingNodeOrderBy
Raised when an operation needs a missing node_order_by attribute

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