device assignment bug-assignment information-bug of organizations list for assignment

apps/pos_device/web/api/v1/serilaizers/client.py

@@ -1,5 +1,7 @@
 from rest_framework.serializers import ModelSerializer
 from apps.pos_device import models as pos_models
+from rest_framework.exceptions import APIException
+from rest_framework import status
 
 
 class POSClientSerializer(ModelSerializer):
@@ -7,6 +9,26 @@ class POSClientSerializer(ModelSerializer):
         model = pos_models.POSClient
         fields = '__all__'
 
+    def validate(self, attrs):
+        org = attrs['organization']
+
+        # check for duplicate organization client
+        if org:
+            if self.Meta.model.objects.filter(organization=org).exists():
+                raise APIException("قبلا کلاینت با این سازمان ثبت شده است", code=status.HTTP_403_FORBIDDEN)  # noqa
+
+        return attrs
+
+    def to_representation(self, instance):
+        representation = super().to_representation(instance)
+
+        representation['organization'] = {
+            'name': instance.organization.name,
+            'id': instance.organization.id
+        }
+
+        return representation
+
 
 class POSClientAttributeSerializer(ModelSerializer):
     class Meta: