Fixes #9728: Fix validation when assigning a virtual machine to a device

netbox/virtualization/forms/models.py

@@ -189,7 +189,8 @@ class VirtualMachineForm(TenancyForm, NetBoxModelForm):
         queryset=Device.objects.all(),
         required=False,
         query_params={
-            'cluster_id': '$cluster'
+            'cluster_id': '$cluster',
+            'site_id': '$site',
         },
         help_text="Optionally pin this VM to a specific host device within the cluster"
     )

netbox/virtualization/models.py

@@ -349,6 +349,10 @@ class VirtualMachine(NetBoxModel, ConfigContextModel):
             })
 
         # Validate assigned cluster device
+        if self.device and not self.cluster:
+            raise ValidationError({
+                'device': f'Must specify a cluster when assigning a host device.'
+            })
         if self.device and self.device not in self.cluster.devices.all():
             raise ValidationError({
                 'device': f'The selected device ({self.device} is not assigned to this cluster ({self.cluster}).'