AttributeError when creating a new object with tags assigned #1885

New Issue

adam · 2025-12-29T17:20:04+01:00

adam commented

2025-12-29 17:20:04 +01:00

Originally created by @jeremystretch on GitHub (Aug 2, 2018).

Environment

Python version: 3.5.2
NetBox version: 2.4-beta1

Steps to Reproduce

Attempt to create a new site with the following API request:

curl -X POST \
-H "Authorization: Token <TOKEN>" \
-H "Content-Type: application/json" \
-H "Accept: application/json; indent=4" \
http://localhost:8000/api/dcim/sites/ \
--data '{"name": "Test Site", "slug": "test-site", "tags": ["foo", "bar"]}'

Expected Behavior

The site should be created with the specified tags assigned to it.

Observed Behavior

Received an AttributeError exception:

...
  File "/home/jstretch/netbox/netbox/utilities/api.py", line 65, in to_internal_value
    content_type = ContentType.objects.get_for_model(obj)
  File "/home/jstretch/.virtualenvs/netbox/lib/python3.5/site-packages/django/contrib/contenttypes/models.py", line 40, in get_for_model
    opts = self._get_opts(model, for_concrete_model)
  File "/home/jstretch/.virtualenvs/netbox/lib/python3.5/site-packages/django/contrib/contenttypes/models.py", line 27, in _get_opts
    model = model._meta.concrete_model
AttributeError: 'NoneType' object has no attribute '_meta'

Originally created by @jeremystretch on GitHub (Aug 2, 2018). ### Environment * Python version: 3.5.2 * NetBox version: 2.4-beta1 ### Steps to Reproduce Attempt to create a new site with the following API request: ``` curl -X POST \ -H "Authorization: Token <TOKEN>" \ -H "Content-Type: application/json" \ -H "Accept: application/json; indent=4" \ http://localhost:8000/api/dcim/sites/ \ --data '{"name": "Test Site", "slug": "test-site", "tags": ["foo", "bar"]}' ``` ### Expected Behavior The site should be created with the specified tags assigned to it. ### Observed Behavior Received an AttributeError exception: ``` ... File "/home/jstretch/netbox/netbox/utilities/api.py", line 65, in to_internal_value content_type = ContentType.objects.get_for_model(obj) File "/home/jstretch/.virtualenvs/netbox/lib/python3.5/site-packages/django/contrib/contenttypes/models.py", line 40, in get_for_model opts = self._get_opts(model, for_concrete_model) File "/home/jstretch/.virtualenvs/netbox/lib/python3.5/site-packages/django/contrib/contenttypes/models.py", line 27, in _get_opts model = model._meta.concrete_model AttributeError: 'NoneType' object has no attribute '_meta' ```

adam added the type: bug status: accepted labels 2025-12-29 17:20:04 +01:00

adam closed this issue

2025-12-29 17:20:04 +01:00

adam commented

2025-12-29 17:20:05 +01:00

@jeremystretch commented on GitHub (Aug 3, 2018):

Fixed by #2297

@jeremystretch commented on GitHub (Aug 3, 2018): Fixed by #2297

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main

update-changelog-comments-docs

feature-removal-issue-type

20911-dropdown

20239-plugin-menu-classes-mutable-state

21097-graphql-id-lookups

feature

fix_module_substitution

20923-dcim-templates

20044-elevation-stuck-lightmode

feature-ip-prefix-link

v4.5-beta1-release

20068-import-moduletype-attrs

20766-fix-german-translation-code-literals

20378-del-script

7604-filter-modifiers-v3

circuit-swap

12318-case-insensitive-uniqueness

20637-improve-device-q-filter

20660-script-load

19724-graphql

20614-update-ruff

14884-script

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19720-macaddress-interface-generic-relation

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20203-openapi-check

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: starred/netbox#1885