From 3e8f1c9b3a80a85308a8f41fe76941fac4168eb5 Mon Sep 17 00:00:00 2001
From: auvipy <auvipy@gmail.com>
Date: Thu, 21 Apr 2016 00:19:30 +0600
Subject: [PATCH 1/2] added get_remote_field compat function

---
 rest_framework/compat.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/rest_framework/compat.py b/rest_framework/compat.py
index e435618a2..fd5890554 100644
--- a/rest_framework/compat.py
+++ b/rest_framework/compat.py
@@ -185,3 +185,18 @@ def template_render(template, context=None, request=None):
     # backends template, e.g. django.template.backends.django.Template
     else:
         return template.render(context, request=request)
+
+def get_remote_field(field):
+    """
+    Django 1.9 removed usage of Rel objects, see
+    https://github.com/django/django/pull/4241
+
+    :param field: Field
+    :return: remote field
+    """
+    from django.db.models import fields
+
+    if django.VERSION < (1, 9):
+        return field.rel
+    else:
+        return field.remote_field
\ No newline at end of file

From d3a30d40b3d2f4e280340fa1c7497358a6bcac99 Mon Sep 17 00:00:00 2001
From: auvipy <auvipy@gmail.com>
Date: Thu, 21 Apr 2016 00:44:33 +0600
Subject: [PATCH 2/2] converted get_pk to use remote field

---
 rest_framework/utils/model_meta.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/rest_framework/utils/model_meta.py b/rest_framework/utils/model_meta.py
index c3424a679..8859cb59c 100644
--- a/rest_framework/utils/model_meta.py
+++ b/rest_framework/utils/model_meta.py
@@ -12,6 +12,7 @@ from django.apps import apps
 from django.core.exceptions import ImproperlyConfigured
 from django.db import models
 from django.utils import six
+from rest_framework.compat import get_remote_field
 
 FieldInfo = namedtuple('FieldResult', [
     'pk',  # Model field instance
@@ -76,9 +77,10 @@ def get_field_info(model):
 
 def _get_pk(opts):
     pk = opts.pk
-    while pk.rel and pk.rel.parent_link:
+    remote_field = get_remote_field(pk)
+    while remote_field and remote_field.parent_link:
         # If model is a child via multi-table inheritance, use parent's pk.
-        pk = pk.rel.to._meta.pk
+        pk = remote_field.to._meta.pk
 
     return pk