catch IntegrityError and raise ValidationError during user creation.

1 files changed, 8 insertions, 0 deletions

diff --git a/pydis_site/apps/api/serializers.py b/pydis_site/apps/api/serializers.py
index 98d58e97..a36bf72f 100644
--- a/pydis_site/apps/api/serializers.py
+++ b/pydis_site/apps/api/serializers.py
@@ -1,5 +1,6 @@
 """Converters from Django models to data interchange formats and back."""
 from django.db.models.query import QuerySet
+from django.db.utils import IntegrityError
 from rest_framework.exceptions import NotFound
 from rest_framework.serializers import (
     IntegerField,
@@ -320,6 +321,13 @@ class UserSerializer(ModelSerializer):
         depth = 1
         list_serializer_class = UserListSerializer
 
+    def create(self, validated_data: dict) -> User:
+        """Override create method to catch IntegrityError."""
+        try:
+            return super().create(validated_data)
+        except IntegrityError:
+            raise ValidationError({"ID": "User with ID already present."})
+
 
 class NominationSerializer(ModelSerializer):
     """A class providing (de-)serialization of `Nomination` instances."""