From 1624213cc9b13d2bf3add3450dbab9511064ce23 Mon Sep 17 00:00:00 2001
From: Clayton Daley <clayton.daley@gmail.com>
Date: Thu, 14 Dec 2017 15:33:16 -0600
Subject: [PATCH] remove vestigial `BaseSerializer` exception (see #5666)

---
 rest_framework/serializers.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index e2ea0d744..031c38c5b 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -784,8 +784,7 @@ def raise_errors_on_nested_writes(method_name, serializer, validated_data):
     #     profile = ProfileSerializer()
     assert not any(
         isinstance(field, BaseSerializer) and
-        (field.source in validated_data) and
-        isinstance(validated_data[field.source], (list, dict))
+        (field.source in validated_data)
         for field in serializer._writable_fields
     ), (
         'The `.{method_name}()` method does not support writable nested '