add - import validator for organization quota stats

apps/product/web/api/v1/serializers/quota_serializers.py

@@ -1,4 +1,5 @@
 from rest_framework import serializers
+from rest_framework.exceptions import APIException
 
 from apps.livestock.web.api.v1.serializers import LiveStockTypeSerializer
 from apps.product import models as product_models
@@ -10,6 +11,13 @@ class QuotaSerializer(serializers.ModelSerializer):
         model = product_models.Quota
         fields = '__all__'
 
+    def validate(self, attrs):
+        weight = attrs['quota_weight']
+        if self.instance:
+            if self.instance.quota_distributed < weight:
+                raise APIException("Quota weight cannot be less than distributed weight.")
+        return attrs
+
     def to_representation(self, instance: product_models.Quota):
         representation = super().to_representation(instance)