bank account existance exception

apps/authentication/api/v1/serializers/serializer.py

@@ -5,7 +5,7 @@ from django.db.models import Q
 from rest_framework import serializers
 
 from apps.authentication.exceptions import UserExistException, OrganizationNationalUniqueIDException, \
-    OrganizationTypeRepeatableException
+    OrganizationTypeRepeatableException, BankAccountExistException
 from apps.authentication.models import (
     User,
     City,
@@ -51,6 +51,14 @@ class BankAccountSerializer(serializers.ModelSerializer):
         model = BankAccountInformation
         fields = '__all__'
 
+    def validate(self, attrs):
+        account = attrs['account']
+        card = attrs['card']
+        sheba = attrs['sheba']
+
+        if self.Meta.model.objects.filter(Q(account=account) | Q(card=card) | Q(sheba=sheba)).exists():
+            raise BankAccountExistException()
+
     def update(self, instance, validated_data):
         """ update user bank account information """
         instance.name = validated_data.get('name', instance.name)