tomchristie/django-rest-framework — pull request #2268 by nazco (2014-12-13 17:20:05+00:00)
Title: add read_only check for dotted-source fields in serializers

The error message tells that you should create an own crate() function
or set read_only=True for the serializer field. The Problem is that the check
ignores this read_only flag.