Ignore old_validated_name if None for val_name_audit_trail

apps/badgrsocialauth/providers/eduid/signals.py

@@ -1,8 +1,9 @@
-import django.dispatch
 import logging
 import uuid
-from django.dispatch import receiver
+
+import django.dispatch
 from django.db import models
+from django.dispatch import receiver
 
 
 class ValidatedNameAuditTrail(models.Model):
@@ -16,20 +17,30 @@ class ValidatedNameAuditTrail(models.Model):
 
 # Signals doc: https://docs.djangoproject.com/en/3.2/topics/signals/
 val_name_audit_trail_signal = django.dispatch.Signal(
-    providing_args=['user', 'old_validated_name', 'new_validated_name']
+    providing_args=["user", "old_validated_name", "new_validated_name"]
 )  # creates a custom signal and specifies the args required.
 
 logger = logging.getLogger(__name__)
 
 
 @receiver(val_name_audit_trail_signal)
-def new_val_name_audit_trail(sender, user, old_validated_name, new_validated_name, **kwargs):
+def new_val_name_audit_trail(
+    sender, user, old_validated_name, new_validated_name, **kwargs
+):
     try:
-        audit_trail = ValidatedNameAuditTrail.objects.create(
-            user=user,
-            old_validated_name=old_validated_name,
-            new_validated_name=new_validated_name,
+        if old_validated_name is None:
+            audit_trail = ValidatedNameAuditTrail.objects.create(
+                user=user,
+                new_validated_name=new_validated_name,
+            )
+        else:
+            audit_trail = ValidatedNameAuditTrail.objects.create(
+                user=user,
+                old_validated_name=old_validated_name,
+                new_validated_name=new_validated_name,
+            )
+        logger.info(
+            f"val_name_audit_trail created {audit_trail.id}  for user {audit_trail.user}"
         )
-        logger.info(f'val_name_audit_trail created {audit_trail.id}  for user {audit_trail.user}')
     except Exception as e:
-        logger.error('val_name_audit_trail error: %s' % (e))
+        logger.error("val_name_audit_trail error: %s" % (e))