django-treebeard Materialized Path tree depth ended up being zero

Question

I found a problematic node with id 633.

tree.find_problems()
([], [], [], [633], [35, 9, 50, 291, 464])

After running tree.fix_tree() It does not find any problems.

tree.find_problems()
([], [], [], [], [])

But actually 633 is still in some wierd state.

>>> node633.depth
0
>>> node633.path
''

Problem: node633.depth is 0 which means its not root but it does not have parent as well. Path is empty too.

This means my code will try to find parent from a node that does not have a parent.

Running fix_tree again does not fix it. Moving node633 is not an option too because:

treebeard.exceptions.InvalidMoveToDescendant: Can't move node to a descendant.

Some more info:

django-treebeard==4.3
Django==2.2.1

I haven't edited paths and depths manually.

Question: How can i fix this broken node633?

Answer 1

I think i had nothing else to do to just delete it. I ran:

node633.delete()
tree.find_problems()
([], [], [], [], [])

Find problems is still happy.

Its not the ideal solution but any better solutions are welcome.