#1266: Exclude interfaces with existing connections or circuit terminations when creating a new connection

netbox/circuits/forms.py

@@ -220,7 +220,7 @@ class CircuitTerminationForm(BootstrapMixin, ChainedFieldsMixin, forms.ModelForm
         label='Interface',
         widget=APISelect(
             api_url='/api/dcim/interfaces/?device_id={{device}}&type=physical',
-            disabled_indicator='connection'
+            disabled_indicator='is_connected'
         )
     )
 

netbox/dcim/forms.py

@@ -1592,7 +1592,7 @@ class InterfaceConnectionForm(BootstrapMixin, ChainedFieldsMixin, forms.ModelFor
         label='Interface',
         widget=APISelect(
             api_url='/api/dcim/interfaces/?device_id={{device_b}}&type=physical',
-            disabled_indicator='connection'
+            disabled_indicator='is_connected'
         )
     )