ImportError: cannot import name 'NESTED_SERIALIZER_PREFIX' from 'netbox.constants' (/opt/netbox/netbox/netbox/constants.py)

[Uzoma8Chi]

Hi,
I tried to install plugin but I get an error.

python3 manage.py migrate
🧬 loaded config '/etc/netbox/config/configuration.py'
🧬 loaded config '/etc/netbox/config/extra.py'
🧬 loaded config '/etc/netbox/config/logging.py'
🧬 loaded config '/etc/netbox/config/plugins.py'
Traceback (most recent call last):
  File "/opt/netbox/netbox/manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
    utility.execute()
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/__init__.py", line 436, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/base.py", line 413, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/base.py", line 459, in execute
    output = self.handle(*args, **options)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/base.py", line 107, in wrapper
    res = handle_func(*args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/commands/migrate.py", line 100, in handle
    self.check(databases=[database])
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/management/base.py", line 486, in check
    all_issues = checks.run_checks(
                 ^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/checks/registry.py", line 88, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/checks/urls.py", line 14, in check_url_config
    return check_resolver(resolver)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/checks/urls.py", line 24, in check_resolver
    return check_method()
           ^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/urls/resolvers.py", line 519, in check
    for pattern in self.url_patterns:
                   ^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/utils/functional.py", line 47, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
                                         ^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/urls/resolvers.py", line 738, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
                       ^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/utils/functional.py", line 47, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
                                         ^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/urls/resolvers.py", line 731, in urlconf_module
    return import_module(self.urlconf_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 995, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/netbox/netbox/netbox/urls.py", line 12, in <module>
    from netbox.plugins.urls import plugin_patterns, plugin_api_patterns
  File "/opt/netbox/netbox/netbox/plugins/urls.py", line 35, in <module>
    urlpatterns = import_string(f"{plugin_path}.api.urls.urlpatterns")
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/utils/module_loading.py", line 30, in import_string
    return cached_import(module_path, class_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/django/utils/module_loading.py", line 15, in cached_import
    module = import_module(module_path)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/netbox/venv/lib/python3.12/site-packages/netbox_contract/api/urls.py", line 3, in <module>
    from . import views
  File "/opt/netbox/venv/lib/python3.12/site-packages/netbox_contract/api/views.py", line 6, in <module>
    from .serializers import (
  File "/opt/netbox/venv/lib/python3.12/site-packages/netbox_contract/api/serializers.py", line 6, in <module>
    from netbox.constants import NESTED_SERIALIZER_PREFIX
ImportError: cannot import name 'NESTED_SERIALIZER_PREFIX' from 'netbox.constants' (/opt/netbox/netbox/netbox/constants.py)

[mlebreuil]

constant NESTED_SERIALIZER_PREFIX indeed removed in Netbox version 4.1.
The issue will be corrected in next update

[mlebreuil]

constant NESTED_SERIALIZER_PREFIX indeed removed in Netbox version 4.1.
The issue will be corrected in next update as part of #186