Fix PeerEndpoint validation to allow all interfaces including Virtual Chassis (#237)

Loosened PeerEndpoint validation

Author: rifen

changes/232.fixed

@@ -0,0 +1 @@
+Fixed PeerEndpoint validation to allow all interfaces (including Virtual Chassis)

nautobot_bgp_models/models.py

@@ -571,7 +571,9 @@ def clean(self):
 
         # Ensure IP related to the routing instance
         if self.routing_instance:
-            if local_ip_value not in IPAddress.objects.filter(interfaces__device_id=self.routing_instance.device.id):
+            if local_ip_value not in IPAddress.objects.filter(
+                interfaces__in=self.routing_instance.device.vc_interfaces
+            ):
                 raise ValidationError("Peer IP not associated with Routing Instance")
         # Enforce Routing Instance if local IP belongs to the Device
         elif not self.routing_instance and IPAddressToInterface.objects.filter(ip_address=local_ip_value).exists():