1 files changed, 12 insertions, 1 deletions
diff --git a/pydis_site/apps/api/serializers.py b/pydis_site/apps/api/serializers.py
index 8a605612..4e7cd863 100644
--- a/pydis_site/apps/api/serializers.py
+++ b/pydis_site/apps/api/serializers.py
@@ -1,6 +1,6 @@
 """Converters from Django models to data interchange formats and back."""
-
 from rest_framework.serializers import ModelSerializer, PrimaryKeyRelatedField, ValidationError
+from rest_framework.validators import UniqueTogetherValidator
 from rest_framework_bulk import BulkSerializerMixin
 
 from .models import (
@@ -105,11 +105,22 @@ class InfractionSerializer(ModelSerializer):
         fields = (
             'id', 'inserted_at', 'expires_at', 'active', 'user', 'actor', 'type', 'reason', 'hidden'
         )
+        validators = [
+            UniqueTogetherValidator(
+                queryset=Infraction.objects.filter(active=True),
+                fields=['user', 'type'],
+                message='This user already has an active infraction of this type.',
+            )
+        ]
 
     def validate(self, attrs: dict) -> dict:
         """Validate data constraints for the given data and abort if it is invalid."""
         infr_type = attrs.get('type')
 
+        active = attrs.get('active')
+        if active and infr_type in ('note', 'warning', 'kick'):
+            raise ValidationError({'active': [f'{infr_type} infractions cannot be active.']})
+
         expires_at = attrs.get('expires_at')
         if expires_at and infr_type in ('kick', 'warning'):
             raise ValidationError({'expires_at': [f'{infr_type} infractions cannot expire.']})