From c71587f69033d439d3128cfda5603a6153b67667 Mon Sep 17 00:00:00 2001
From: gsvr <george@westerncapelabs.com>
Date: Thu, 5 Apr 2018 14:43:27 +0200
Subject: [PATCH] Import coreapi from rest_framework.compat, not directly.

Bugfix.

https://github.com/encode/django-rest-framework/issues/5918
---
 rest_framework/authtoken/views.py | 46 +++++++++++++++----------------
 tests/test_renderers.py           |  2 +-
 2 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/rest_framework/authtoken/views.py b/rest_framework/authtoken/views.py
index ff53c01baf..a8c751d51d 100644
--- a/rest_framework/authtoken/views.py
+++ b/rest_framework/authtoken/views.py
@@ -1,8 +1,7 @@
-import coreapi
-import coreschema
 from rest_framework import parsers, renderers
 from rest_framework.authtoken.models import Token
 from rest_framework.authtoken.serializers import AuthTokenSerializer
+from rest_framework.compat import coreapi, coreschema
 from rest_framework.response import Response
 from rest_framework.schemas import ManualSchema
 from rest_framework.views import APIView
@@ -14,29 +13,30 @@ class ObtainAuthToken(APIView):
     parser_classes = (parsers.FormParser, parsers.MultiPartParser, parsers.JSONParser,)
     renderer_classes = (renderers.JSONRenderer,)
     serializer_class = AuthTokenSerializer
-    schema = ManualSchema(
-        fields=[
-            coreapi.Field(
-                name="username",
-                required=True,
-                location='form',
-                schema=coreschema.String(
-                    title="Username",
-                    description="Valid username for authentication",
+    if coreapi is not None and coreschema is not None:
+        schema = ManualSchema(
+            fields=[
+                coreapi.Field(
+                    name="username",
+                    required=True,
+                    location='form',
+                    schema=coreschema.String(
+                        title="Username",
+                        description="Valid username for authentication",
+                    ),
                 ),
-            ),
-            coreapi.Field(
-                name="password",
-                required=True,
-                location='form',
-                schema=coreschema.String(
-                    title="Password",
-                    description="Valid password for authentication",
+                coreapi.Field(
+                    name="password",
+                    required=True,
+                    location='form',
+                    schema=coreschema.String(
+                        title="Password",
+                        description="Valid password for authentication",
+                    ),
                 ),
-            ),
-        ],
-        encoding="application/json",
-    )
+            ],
+            encoding="application/json",
+        )
 
     def post(self, request, *args, **kwargs):
         serializer = self.serializer_class(data=request.data,
diff --git a/tests/test_renderers.py b/tests/test_renderers.py
index ba8400c065..667631f294 100644
--- a/tests/test_renderers.py
+++ b/tests/test_renderers.py
@@ -14,8 +14,8 @@
 from django.utils.safestring import SafeText
 from django.utils.translation import ugettext_lazy as _
 
-import coreapi
 from rest_framework import permissions, serializers, status
+from rest_framework.compat import coreapi
 from rest_framework.renderers import (
     AdminRenderer, BaseRenderer, BrowsableAPIRenderer, DocumentationRenderer,
     HTMLFormRenderer, JSONRenderer, SchemaJSRenderer, StaticHTMLRenderer