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/dcim/tables/devices.py

@@ -27,7 +27,6 @@ __all__ = (
     'DeviceTable',
     'FrontPortTable',
     'InterfaceTable',
-    'InterfaceLAGMemberTable',
     'InventoryItemRoleTable',
     'InventoryItemTable',
     'MACAddressTable',
@@ -690,33 +689,6 @@ class InterfaceTable(BaseInterfaceTable, ModularDeviceComponentTable, PathEndpoi
         default_columns = ('pk', 'name', 'device', 'label', 'enabled', 'type', 'description')
 
 
-class InterfaceLAGMemberTable(PathEndpointTable, NetBoxTable):
-    parent = tables.Column(
-        verbose_name=_('Parent'),
-        accessor=Accessor('device'),
-        linkify=True,
-    )
-    name = tables.Column(
-        verbose_name=_('Name'),
-        linkify=True,
-        order_by=('_name',),
-    )
-    connection = columns.TemplateColumn(
-        accessor='connected_endpoints',
-        template_code=INTERFACE_LAG_MEMBERS_LINKTERMINATION,
-        verbose_name=_('Peer'),
-        orderable=False,
-    )
-    tags = columns.TagColumn(
-        url_name='dcim:interface_list'
-    )
-
-    class Meta(NetBoxTable.Meta):
-        model = models.Interface
-        fields = ('pk', 'parent', 'name', 'type', 'connection')
-        default_columns = ('pk', 'parent', 'name', 'type', 'connection')
-
-
 class DeviceInterfaceTable(InterfaceTable):
     name = tables.TemplateColumn(
         verbose_name=_('Name'),

netbox/dcim/tables/template_code.py

@@ -24,24 +24,6 @@ INTERFACE_LINKTERMINATION = """
 {% else %}""" + LINKTERMINATION + """{% endif %}
 """
 
-INTERFACE_LAG_MEMBERS_LINKTERMINATION = """
-{% for termination in value %}
-  {% if termination.parent_object %}
-    <a href="{{ termination.parent_object.get_absolute_url }}">{{ termination.parent_object }}</a>
-    <i class="mdi mdi-chevron-right"></i>
-  {% endif %}
-  <a href="{{ termination.get_absolute_url }}">{{ termination }}</a>
-  {% if termination.lag %}
-    <i class="mdi mdi-chevron-right"></i>
-    <a href="{{ termination.lag.get_absolute_url }}">{{ termination.lag }}</a>
-    <span class="text-muted">(LAG)</span>
-  {% endif %}
-  {% if not forloop.last %}<br />{% endif %}
-{% empty %}
-  {{ ''|placeholder }}
-{% endfor %}
-"""
-
 CABLE_LENGTH = """
 {% load helpers %}
 {% if record.length %}{{ record.length|floatformat:"-2" }} {{ record.length_unit }}{% endif %}

netbox/dcim/views.py

@@ -3135,14 +3135,6 @@ class InterfaceView(generic.ObjectView):
         )
         child_interfaces_table.configure(request)
 
-        # Get LAG interfaces
-        lag_interfaces = Interface.objects.restrict(request.user, 'view').filter(lag=instance)
-        lag_interfaces_table = tables.InterfaceLAGMemberTable(
-            lag_interfaces,
-            orderable=False
-        )
-        lag_interfaces_table.configure(request)
-
         # Get assigned VLANs and annotate whether each is tagged or untagged
         vlans = []
         if instance.untagged_vlan is not None:
@@ -3172,7 +3164,6 @@ class InterfaceView(generic.ObjectView):
             'bridge_interfaces': bridge_interfaces,
             'bridge_interfaces_table': bridge_interfaces_table,
             'child_interfaces_table': child_interfaces_table,
-            'lag_interfaces_table': lag_interfaces_table,
             'vlan_table': vlan_table,
             'vlan_translation_table': vlan_translation_table,
         }

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/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/templates/dcim/interface.html

@@ -370,6 +370,33 @@
           </table>
         </div>
       {% endif %}
+      {% if object.is_lag %}
+        <div class="card">
+          <h2 class="card-header">{% trans "LAG Members" %}</h2>
+          <table class="table table-hover">
+            <thead>
+              <tr>
+                <th>{% trans "Parent" %}</th>
+                <th>{% trans "Interface" %}</th>
+                <th>{% trans "Type" %}</th>
+              </tr>
+            </thead>
+            <tbody>
+              {% for member in object.member_interfaces.all %}
+                <tr>
+                  <td>{{ member.device|linkify }}</td>
+                  <td>{{ member|linkify }}</td>
+                  <td>{{ member.get_type_display }}</td>
+                </tr>
+              {% empty %}
+                <tr>
+                  <td colspan="3" class="text-muted">{% trans "No member interfaces" %}</td>
+                </tr>
+              {% endfor %}
+            </tbody>
+          </table>
+        </div>
+      {% endif %}
       {% include 'ipam/inc/panels/fhrp_groups.html' %}
       {% include 'dcim/inc/panels/inventory_items.html' %}
       {% plugin_right_page object %}
@@ -414,13 +441,6 @@
       {% include 'inc/panel_table.html' with table=vlan_table heading="VLANs" %}
     </div>
   </div>
-  {% if object.is_lag %}
-    <div class="row mb-3">
-      <div class="col col-md-12">
-        {% include 'inc/panel_table.html' with table=lag_interfaces_table heading="LAG Members" %}
-      </div>
-    </div>
-  {% endif %}
   {% if object.vlan_translation_policy %}
     <div class="row mb-3">
       <div class="col col-md-12">