Updating object with JSON custom field causes a traceback

I have a JSON custom field on some objects in my NetBox 3.2beta instance. When trying to update one of the objects I get this traceback.

Traceback (most recent call last):
  File "/home/jcollie/dev/netbox-maintenance/fix-model-aliases.py", line 602, in <module>
    main()
  File "/usr/lib/python3.10/site-packages/click/core.py", line 1137, in __call__
    return self.main(*args, **kwargs)
  File "/usr/lib/python3.10/site-packages/click/core.py", line 1062, in main
    rv = self.invoke(ctx)
  File "/usr/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/lib/python3.10/site-packages/click/core.py", line 763, in invoke
    return __callback(*args, **kwargs)
  File "/home/jcollie/dev/netbox-maintenance/fix-model-aliases.py", line 597, in main
    if device_type.save():
  File "/home/jcollie/.local/lib/python3.10/site-packages/pynetbox/core/response.py", line 529, in save
    updates = self.updates()
  File "/home/jcollie/.local/lib/python3.10/site-packages/pynetbox/core/response.py", line 506, in updates
    diff = self._diff()
  File "/home/jcollie/.local/lib/python3.10/site-packages/pynetbox/core/response.py", line 484, in _diff
    {fmt_dict(k, v) for k, v in self.serialize(init=True).items()}
  File "/home/jcollie/.local/lib/python3.10/site-packages/pynetbox/core/response.py", line 457, in serialize
    ret[i] = flatten_custom(current_val)
  File "/home/jcollie/.local/lib/python3.10/site-packages/pynetbox/core/response.py", line 61, in flatten_custom
    return {
  File "/home/jcollie/.local/lib/python3.10/site-packages/pynetbox/core/response.py", line 62, in <dictcomp>
    k: v if not isinstance(v, dict) else v["value"] for k, v in custom_dict.items()
KeyError: 'value'

[mrlocke]

Thanks @rodvand. I’ve tested the solution proposed above by markkuleinio and now everything works. Not sure if it may break something else, but up to the moment all other automations I’ve works fine.

It will be really nice if this can be included in pynetbox production release.

[Kani999]

Any workaround for this that you know of? I am stuck at updating our objects now when we use custom_fields as objects.

– Kind Regards Falk

I’ve forked the repository and did a small change https://github.com/Kani999/pynetbox/tree/fix_cf_6.6.2

• https://github.com/netbox-community/pynetbox/compare/master...Kani999:pynetbox:fix_cf_6.6.2

Then I released the forked version to pypi, so I can simply install it in my projects.

• https://pypi.org/project/kani-fork-pynetbox/

I’m trying to maintain the version with the original pynetbox, but I don’t guarantee anything in the future