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/extras/events.py

@@ -86,7 +86,7 @@ def enqueue_event(queue, instance, request, event_type):
 
 
 def process_event_rules(event_rules, object_type, event_type, data, username=None, snapshots=None, request=None):
-    user = User.objects.get(username=username) if username else None
+    user = None  # To be resolved from the username if needed
 
     for event_rule in event_rules:
 
@@ -134,6 +134,10 @@ def process_event_rules(event_rules, object_type, event_type, data, username=Non
             # Resolve the script from action parameters
             script = event_rule.action_object.python_class()
 
+            # Retrieve the User if not already resolved
+            if user is None:
+                user = User.objects.get(username=username)
+
             # Enqueue a Job to record the script's execution
             from extras.jobs import ScriptJob
             params = {

netbox/extras/tables/tables.py

@@ -43,7 +43,7 @@ IMAGEATTACHMENT_IMAGE = """
   <a href="{{ record.image.url }}" target="_blank" class="image-preview" data-bs-placement="top">
     <i class="mdi mdi-image"></i></a>
 {% endif %}
-<a href="{{ record.get_absolute_url }}">{{ record }}</a>
+<a href="{{ record.get_absolute_url }}">{{ record.filename|truncate_middle:16 }}</a>
 """
 
 NOTIFICATION_ICON = """

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/translations/en/LC_MESSAGES/django.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-01-21 05:07+0000\n"
+"POT-Creation-Date: 2026-01-22 05:07+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -12037,7 +12037,7 @@ msgstr ""
 msgid "date synced"
 msgstr ""
 
-#: netbox/netbox/models/features.py:623
+#: netbox/netbox/models/features.py:621
 #, python-brace-format
 msgid "{class_name} must implement a sync_data() method."
 msgstr ""
@@ -13935,8 +13935,8 @@ msgid "No VLANs Assigned"
 msgstr ""
 
 #: netbox/templates/dcim/inc/interface_vlans_table.html:44
-#: netbox/templates/ipam/prefix_list.html:16
-#: netbox/templates/ipam/prefix_list.html:33
+#: netbox/templates/ipam/inc/max_depth.html:11
+#: netbox/templates/ipam/inc/max_length.html:11
 msgid "Clear"
 msgstr ""
 
@@ -15053,8 +15053,8 @@ msgstr ""
 msgid "Date Added"
 msgstr ""
 
-#: netbox/templates/ipam/aggregate/prefixes.html:8
-#: netbox/templates/ipam/prefix/prefixes.html:8
+#: netbox/templates/ipam/aggregate/prefixes.html:10
+#: netbox/templates/ipam/prefix/prefixes.html:10
 #: netbox/templates/ipam/role.html:10
 msgid "Add Prefix"
 msgstr ""
@@ -15083,6 +15083,14 @@ msgstr ""
 msgid "Bulk Create"
 msgstr ""
 
+#: netbox/templates/ipam/inc/max_depth.html:6
+msgid "Max Depth"
+msgstr ""
+
+#: netbox/templates/ipam/inc/max_length.html:6
+msgid "Max Length"
+msgstr ""
+
 #: netbox/templates/ipam/inc/panels/fhrp_groups.html:10
 msgid "Create Group"
 msgstr ""
@@ -15184,14 +15192,6 @@ msgstr ""
 msgid "Hide Depth Indicators"
 msgstr ""
 
-#: netbox/templates/ipam/prefix_list.html:11
-msgid "Max Depth"
-msgstr ""
-
-#: netbox/templates/ipam/prefix_list.html:28
-msgid "Max Length"
-msgstr ""
-
 #: netbox/templates/ipam/rir.html:10
 msgid "Add Aggregate"
 msgstr ""

netbox/utilities/templatetags/builtins/filters.py

@@ -252,3 +252,16 @@ def isodatetime(value, spec='seconds'):
     else:
         return ''
     return mark_safe(f'<span title="{naturaltime(value)}">{text}</span>')
+
+
+@register.filter
+def truncate_middle(value, length):
+    if len(value) <= length:
+        return value
+
+    # Calculate split points for the two parts
+    half_len = (length - 1) // 2  # 1 for the ellipsis
+    first_part = value[:half_len]
+    second_part = value[len(value) - (length - 1 - half_len):]
+
+    return mark_safe(f"{first_part}&hellip;{second_part}")