rancher check unique - pos free products check unique - 500 error handling

apps/herd/pos/api/v1/api.py

@@ -1,10 +1,5 @@
-from apps.herd.web.api.v1.serializers import HerdSerializer, RancherSerializer
+from apps.herd.pos.api.v1.serializers import HerdSerializer, RancherSerializer
 from apps.livestock.web.api.v1.serializers import LiveStockSerializer
-from apps.herd.services.services import (
-    get_rancher_statistics,
-    rancher_quota_weight
-)
-from apps.warehouse.models import InventoryEntry
 from apps.core.mixins.search_mixin import DynamicSearchMixin
 from rest_framework.exceptions import APIException
 from rest_framework.permissions import AllowAny

apps/herd/pos/api/v1/serializers.py

@@ -42,6 +42,8 @@ class RancherSerializer(serializers.ModelSerializer):
         if self.Meta.model.objects.filter(national_code=attrs['national_code']).exists():
             raise UniqueRancherApiException()
 
+        return attrs
+
     def to_representation(self, instance):
         """ customize output of serializer """