tomchristie/django-rest-framework — pull request #1963 by carljm (2014-10-16 18:19:35+00:00)
Title: Set up serializer fields lazily on-demand.

This avoids AppRegistryNotReady problems in Django 1.7 with nested serializers,
which are instantiated at import time, possibly before Django's app registry is
fully populated.

Fixes #1907 and #1943.