Fix https://sentry.lil.school/lil/backend/issues/13/

apps/user/models.py

@@ -135,18 +135,11 @@ def send_user_info_to_mixpanel(sender, instance=None, created=False, **kwargs):
 
 @receiver(post_save, sender=User)
 def auto_create_subscription(sender, instance=None, created=False, **kwargs):
-    try:
-        es = EmailSubscription.objects.get(email=instance.email)
-        if not hasattr(instance, 'email_subscription'):
-            es.user = instance
-            es.save()
-    except EmailSubscription.DoesNotExist:
-        instance.email_subscription = EmailSubscription.objects.create(
-            user=instance,
-            email=instance.email,
-        )
+    if created:
+        es, created = EmailSubscription.objects.get_or_create(email=instance.email)
+        es.user = instance
+        es.save()
         instance.email_subscription.categories.set(SubscriptionCategory.objects.filter(auto_add=True))
-        instance.save()
 
 
 class AuthorRequestManager(models.Manager):