fix(misc): Handle cache unpickling failure in release check

Guard `cache.get('latest_release')` during release checks to prevent a
500 when stale cached data can't be unpickled after dependency upgrades.
On failure, log at debug level and delete the affected cache key.

Fixes #21254

netbox/core/models/object_types.py

@@ -9,7 +9,6 @@ from django.db import connection, models
 from django.db.models import Q
 from django.utils.translation import gettext as _
 
-from netbox.context import object_types_cache
 from netbox.plugins import PluginConfig
 from netbox.registry import registry
 from utilities.string import title
@@ -71,12 +70,6 @@ class ObjectTypeManager(models.Manager):
         """
         from netbox.models.features import get_model_features, model_is_public
 
-        # Check the request cache before hitting the database
-        cache = object_types_cache.get()
-        if cache is not None:
-            if ot := cache.get((model._meta.model, for_concrete_model)):
-                return ot
-
         # TODO: Remove this in NetBox v5.0
         # If the ObjectType table has not yet been provisioned (e.g. because we're in a pre-v4.4 migration),
         # fall back to ContentType.
@@ -103,10 +96,6 @@ class ObjectTypeManager(models.Manager):
                 features=get_model_features(model),
             )[0]
 
-        # Populate the request cache to avoid redundant lookups
-        if cache is not None:
-            cache[(model._meta.model, for_concrete_model)] = ot
-
         return ot
 
     def get_for_models(self, *models, for_concrete_models=True):

netbox/dcim/forms/model_forms.py

@@ -20,9 +20,7 @@ from utilities.forms.fields import (
     DynamicModelChoiceField, DynamicModelMultipleChoiceField, JSONField, NumericArrayField, SlugField,
 )
 from utilities.forms.rendering import FieldSet, InlineFields, TabbedGroups
-from utilities.forms.widgets import (
-    APISelect, ClearableFileInput, ClearableSelect, HTMXSelect, NumberWithOptions, SelectWithPK,
-)
+from utilities.forms.widgets import APISelect, ClearableFileInput, HTMXSelect, NumberWithOptions, SelectWithPK
 from utilities.jsonschema import JSONSchemaProperty
 from virtualization.models import Cluster, VMInterface
 from wireless.models import WirelessLAN, WirelessLANGroup
@@ -594,14 +592,6 @@ class DeviceForm(TenancyForm, PrimaryModelForm):
             },
         )
     )
-    face = forms.ChoiceField(
-        label=_('Face'),
-        choices=add_blank_choice(DeviceFaceChoices),
-        required=False,
-        widget=ClearableSelect(
-            requires_fields=['rack']
-        )
-    )
     device_type = DynamicModelChoiceField(
         label=_('Device type'),
         queryset=DeviceType.objects.all(),

netbox/netbox/context.py

@@ -3,10 +3,8 @@ from contextvars import ContextVar
 __all__ = (
     'current_request',
     'events_queue',
-    'object_types_cache',
 )
 
 
 current_request = ContextVar('current_request', default=None)
 events_queue = ContextVar('events_queue', default=dict())
-object_types_cache = ContextVar('object_types_cache', default=None)

netbox/netbox/context_managers.py

@@ -1,6 +1,6 @@
 from contextlib import contextmanager
 
-from netbox.context import current_request, events_queue, object_types_cache
+from netbox.context import current_request, events_queue
 from netbox.utils import register_request_processor
 from extras.events import flush_events
 
@@ -16,7 +16,6 @@ def event_tracking(request):
     """
     current_request.set(request)
     events_queue.set({})
-    object_types_cache.set({})
 
     yield
 
@@ -27,4 +26,3 @@ def event_tracking(request):
     # Clear context vars
     current_request.set(None)
     events_queue.set({})
-    object_types_cache.set(None)

netbox/netbox/views/misc.py

@@ -1,5 +1,6 @@
 import re
 from collections import namedtuple
+import logging
 
 from django.conf import settings
 from django.contrib import messages
@@ -28,6 +29,8 @@ __all__ = (
     'SearchView',
 )
 
+logger = logging.getLogger(f'netbox.{__name__}')
+
 Link = namedtuple('Link', ('label', 'viewname', 'permission', 'count'))
 
 
@@ -50,7 +53,14 @@ class HomeView(ConditionalLoginRequiredMixin, View):
         # Check whether a new release is available. (Only for superusers.)
         new_release = None
         if request.user.is_superuser:
-            latest_release = cache.get('latest_release')
+            # cache.get() can raise if the cached value can't be unpickled after dependency upgrades
+            try:
+                latest_release = cache.get('latest_release')
+            except Exception:
+                logger.debug("Failed to read 'latest_release' from cache; deleting key", exc_info=True)
+                cache.delete('latest_release')
+                latest_release = None
+
             if latest_release:
                 release_version, release_url = latest_release
                 if release_version > version.parse(settings.RELEASE.version):

netbox/project-static/src/forms/clearField.ts

@@ -1,40 +0,0 @@
-import TomSelect from 'tom-select';
-import { getElements } from '../util';
-
-/**
- * Initialize clear-field dependencies.
- * When a required field is cleared, dependent fields with data-requires-fields attribute will also be cleared.
- */
-export function initClearField(): void {
-  // Find all fields with data-requires-fields attribute
-  for (const field of getElements<HTMLSelectElement>('[data-requires-fields]')) {
-    const requiredFieldsAttr = field.getAttribute('data-requires-fields');
-    if (!requiredFieldsAttr) continue;
-
-    // Parse the comma-separated list of required field names
-    const requiredFields = requiredFieldsAttr.split(',').map(name => name.trim());
-
-    // Set up listeners for each required field
-    for (const requiredFieldName of requiredFields) {
-      const requiredField = document.querySelector<HTMLSelectElement>(
-        `[name="${requiredFieldName}"]`,
-      );
-      if (!requiredField) continue;
-
-      // Listen for changes on the required field
-      requiredField.addEventListener('change', () => {
-        // If required field is cleared, also clear this dependent field
-        if (!requiredField.value || requiredField.value === '') {
-          // Check if this field uses TomSelect
-          const tomselect = (field as HTMLSelectElement & { tomselect?: TomSelect }).tomselect;
-          if (tomselect) {
-            tomselect.clear();
-          } else {
-            // Regular select field
-            field.value = '';
-          }
-        }
-      });
-    }
-  }
-}

netbox/project-static/src/forms/index.ts

@@ -1,10 +1,9 @@
-import { initClearField } from './clearField';
 import { initFormElements } from './elements';
 import { initFilterModifiers } from './filterModifiers';
 import { initSpeedSelector } from './speedSelector';
 
 export function initForms(): void {
-  for (const func of [initFormElements, initSpeedSelector, initFilterModifiers, initClearField]) {
+  for (const func of [initFormElements, initSpeedSelector, initFilterModifiers]) {
     func();
   }
 }

netbox/utilities/forms/widgets/select.py

@@ -5,7 +5,6 @@ from ..utils import add_blank_choice
 
 __all__ = (
     'BulkEditNullBooleanSelect',
-    'ClearableSelect',
     'ColorSelect',
     'HTMXSelect',
     'SelectWithPK',
@@ -29,21 +28,6 @@ class BulkEditNullBooleanSelect(forms.NullBooleanSelect):
         )
 
 
-class ClearableSelect(forms.Select):
-    """
-    A Select widget that will be automatically cleared when one or more required fields are cleared.
-
-    Args:
-        requires_fields: A list of field names that this field depends on. When any of these fields
-                        are cleared, this field will also be cleared automatically via JavaScript.
-    """
-
-    def __init__(self, *args, requires_fields=None, **kwargs):
-        super().__init__(*args, **kwargs)
-        if requires_fields:
-            self.attrs['data-requires-fields'] = ','.join(requires_fields)
-
-
 class ColorSelect(forms.Select):
     """
     Extends the built-in Select widget to colorize each <option>.