Add initial_params to all forms

netbox/virtualization/forms.py

@@ -266,7 +266,10 @@ class VirtualMachineForm(BootstrapMixin, TenancyForm, CustomFieldModelForm):
     cluster_group = DynamicModelChoiceField(
         queryset=ClusterGroup.objects.all(),
         required=False,
-        null_option='None'
+        null_option='None',
+        initial_params={
+            'clusters': '$cluster'
+        }
     )
     cluster = DynamicModelChoiceField(
         queryset=Cluster.objects.all(),
@@ -311,14 +314,6 @@ class VirtualMachineForm(BootstrapMixin, TenancyForm, CustomFieldModelForm):
         }
 
     def __init__(self, *args, **kwargs):
-
-        # Initialize helper selector
-        instance = kwargs.get('instance')
-        if instance.pk and instance.cluster is not None:
-            initial = kwargs.get('initial', {}).copy()
-            initial['cluster_group'] = instance.cluster.group
-            kwargs['initial'] = initial
-
         super().__init__(*args, **kwargs)
 
         if self.instance.pk: