Event Rules on models that reference image files generate error #820

New Issue

MrUnknownDE · 2026-04-05T17:56:40+02:00

MrUnknownDE commented

2026-04-05 17:56:40 +02:00

Originally created by @tyler-8 on 11/24/2025

NetBox Edition

NetBox Community

NetBox Version

v4.4.5

Python Version

3.12

Steps to Reproduce

Create an Event Rule for DCIM | device type or extras | image attachement
Create a new Device Type with a front and/or rear image and click 'Create`

Expected Behavior

In GUI, new device type page loads without errors.

Observed Behavior

Traceback (most recent call last):
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/django/core/handlers/exception.py", line 55, in inner
    response = get_response(request)
               ^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/releases/netbox-4.4.5/netbox/netbox/middleware.py", line 40, in __call__
    with apply_request_processors(request):
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
    ^^^^^^^^^^^^^^
  File "/opt/netbox/releases/netbox-4.4.5/netbox/utilities/request.py", line 102, in apply_request_processors
    with ExitStack() as stack:
         ^^^^^^^^^^^
  File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 610, in __exit__
    raise exc_details[1]
    ^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 595, in __exit__
    if cb(*exc_details):
       ^^^^^^^^^^^^^^^^
  File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 144, in __exit__
    next(self.gen)
    ^^^^^^^^^^^^^^
  File "/opt/netbox/releases/netbox-4.4.5/netbox/netbox/context_managers.py", line 24, in event_tracking
    flush_events(events)
    ^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/releases/netbox-4.4.5/netbox/extras/events.py", line 198, in flush_events
    func(events)
    ^^^^^^^^^^^^
  File "/opt/netbox/releases/netbox-4.4.5/netbox/extras/events.py", line 179, in process_event_queue
    process_event_rules(
    ^
  File "/opt/netbox/releases/netbox-4.4.5/netbox/extras/events.py", line 125, in process_event_rules
    rq_queue.enqueue(
    ^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 1011, in enqueue
    return self.enqueue_call(
          
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/django_rq/queues.py", line 75, in enqueue_call
    return self.original_enqueue_call(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/django_rq/queues.py", line 71, in original_enqueue_call
    return super(DjangoRQ, self).enqueue_call(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 743, in enqueue_call
    return self.enqueue_job(job, pipeline=pipeline, at_front=at_front)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 1142, in enqueue_job
    return self._enqueue_job(job, pipeline=pipeline, at_front=at_front)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 1170, in _enqueue_job
    job.save(pipeline=pipe)
    ^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/job.py", line 1117, in save
    mapping = self.to_dict(include_meta=include_meta, include_result=include_result)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/job.py", line 1031, in to_dict
    'data': zlib.compress(self.data),
                          ^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/job.py", line 570, in data
    self._data = self.serializer.dumps(job_tuple)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/JpegImagePlugin.py", line 399, in __getstate__
    return super().__getstate__() + [self.layers, self.layer]
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/ImageFile.py", line 257, in __getstate__
    return super().__getstate__() + [self.filename]
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/Image.py", line 739, in __getstate__
    im_data = self.tobytes()  # load image first
              ^^^^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/Image.py", line 785, in tobytes
    self.load()
    ^^^^^^^^^^^
  File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/ImageFile.py", line 302, in load
    seek = self.fp.seek
           ^^^^^^^^^^^^

Exception Type: AttributeError at /dcim/device-types/add/
Exception Value: 'NoneType' object has no attribute 'seek'
Raised during: dcim.views.DeviceTypeEditView

Stack Overflow with related discussion: https://stackoverflow.com/a/77483484

FWIW I do not think this was an issue in NetBox v4.1.

*Originally created by @tyler-8 on 11/24/2025* ### NetBox Edition NetBox Community ### NetBox Version v4.4.5 ### Python Version 3.12 ### Steps to Reproduce 1. Create an Event Rule for `DCIM | device type` or `extras | image attachement` 2. Create a new Device Type with a front and/or rear image and click 'Create` ### Expected Behavior In GUI, new device type page loads without errors. ### Observed Behavior <img width="945" height="633" alt="Image" src="https://github.com/user-attachments/assets/e095e9fe-03e9-4c55-9f1b-bfc5d5c33492" /> ``` Traceback (most recent call last): File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/django/core/handlers/exception.py", line 55, in inner response = get_response(request) ^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/releases/netbox-4.4.5/netbox/netbox/middleware.py", line 40, in __call__ with apply_request_processors(request): ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 144, in __exit__ next(self.gen) ^^^^^^^^^^^^^^ File "/opt/netbox/releases/netbox-4.4.5/netbox/utilities/request.py", line 102, in apply_request_processors with ExitStack() as stack: ^^^^^^^^^^^ File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 610, in __exit__ raise exc_details[1] ^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 595, in __exit__ if cb(*exc_details): ^^^^^^^^^^^^^^^^ File "/opt/netbox/.pyenv/versions/3.12.8/lib/python3.12/contextlib.py", line 144, in __exit__ next(self.gen) ^^^^^^^^^^^^^^ File "/opt/netbox/releases/netbox-4.4.5/netbox/netbox/context_managers.py", line 24, in event_tracking flush_events(events) ^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/releases/netbox-4.4.5/netbox/extras/events.py", line 198, in flush_events func(events) ^^^^^^^^^^^^ File "/opt/netbox/releases/netbox-4.4.5/netbox/extras/events.py", line 179, in process_event_queue process_event_rules( ^ File "/opt/netbox/releases/netbox-4.4.5/netbox/extras/events.py", line 125, in process_event_rules rq_queue.enqueue( ^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 1011, in enqueue return self.enqueue_call( File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/django_rq/queues.py", line 75, in enqueue_call return self.original_enqueue_call(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/django_rq/queues.py", line 71, in original_enqueue_call return super(DjangoRQ, self).enqueue_call(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 743, in enqueue_call return self.enqueue_job(job, pipeline=pipeline, at_front=at_front) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 1142, in enqueue_job return self._enqueue_job(job, pipeline=pipeline, at_front=at_front) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/queue.py", line 1170, in _enqueue_job job.save(pipeline=pipe) ^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/job.py", line 1117, in save mapping = self.to_dict(include_meta=include_meta, include_result=include_result) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/job.py", line 1031, in to_dict 'data': zlib.compress(self.data), ^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/rq/job.py", line 570, in data self._data = self.serializer.dumps(job_tuple) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/JpegImagePlugin.py", line 399, in __getstate__ return super().__getstate__() + [self.layers, self.layer] ^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/ImageFile.py", line 257, in __getstate__ return super().__getstate__() + [self.filename] ^^^^^^^^^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/Image.py", line 739, in __getstate__ im_data = self.tobytes() # load image first ^^^^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/Image.py", line 785, in tobytes self.load() ^^^^^^^^^^^ File "/opt/netbox/current/venv-py3/lib/python3.12/site-packages/PIL/ImageFile.py", line 302, in load seek = self.fp.seek ^^^^^^^^^^^^ Exception Type: AttributeError at /dcim/device-types/add/ Exception Value: 'NoneType' object has no attribute 'seek' Raised during: dcim.views.DeviceTypeEditView ``` Stack Overflow with related discussion: https://stackoverflow.com/a/77483484 FWIW I do not think this was an issue in NetBox v4.1.

MrUnknownDE closed this issue

2026-04-05 17:56:40 +02:00

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Branches Tags

main

21455-sql-indexes-audit

21357-register-model-actions

feature

20924-plugin-ui-components

21766-improve-test-coverage-for-sortable-table-columns

21157-export-template-public-models

21025-pre-render-config-contexts

21364-swagger

feature-ip-prefix-link

20911-dropdown-3

fix_module_substitution

21160-filterset

20911-dropdown-2

20044-elevation-stuck-lightmode

7604-filter-modifiers-v3

20660-script-load

19724-graphql

14884-script

19720-macaddress-interface-generic-relation

fix-19669-api-image-download

7604-filter-modifiers

19275-fixes-interface-bulk-edit

fix-17794-get_field_value_return_list

11507-show-aggregate-and-rir-on-api

9583-add_column_specific_search_field_to_tables

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Reference: github/netbox#820