WIP: Remove Django 1.8 and 1.9 compatibility code.

rest_framework/compat.py

@@ -78,24 +78,7 @@ def distinct(queryset, base):
     return queryset.distinct()
 
 
-# Obtaining manager instances and names from model options differs after 1.10.
-def get_names_and_managers(options):
-    if django.VERSION >= (1, 10):
-        # Django 1.10 onwards provides a `.managers` property on the Options.
-        return [
-            (manager.name, manager)
-            for manager
-            in options.managers
-        ]
-    # For Django 1.8 and 1.9, use the three-tuple information provided
-    # by .concrete_managers and .abstract_managers
-    return [
-        (manager_info[1], manager_info[2])
-        for manager_info
-        in (options.concrete_managers + options.abstract_managers)
-    ]
-
-
+# TODO: Remove
 # field.rel is deprecated from 1.9 onwards
 def get_remote_field(field, **kwargs):
     if 'default' in kwargs:
@@ -132,44 +115,6 @@ def _resolve_model(obj):
     raise ValueError("{0} is not a Django model".format(obj))
 
 
-def is_authenticated(user):
-    if django.VERSION < (1, 10):
-        return user.is_authenticated()
-    return user.is_authenticated
-
-
-def is_anonymous(user):
-    if django.VERSION < (1, 10):
-        return user.is_anonymous()
-    return user.is_anonymous
-
-
-def get_related_model(field):
-    if django.VERSION < (1, 9):
-        return _resolve_model(field.rel.to)
-    return field.remote_field.model
-
-
-def value_from_object(field, obj):
-    if django.VERSION < (1, 9):
-        return field._get_val_from_obj(obj)
-    return field.value_from_object(obj)
-
-
-# contrib.postgres only supported from 1.8 onwards.
-try:
-    from django.contrib.postgres import fields as postgres_fields
-except ImportError:
-    postgres_fields = None
-
-
-# JSONField is only supported from 1.9 onwards
-try:
-    from django.contrib.postgres.fields import JSONField
-except ImportError:
-    JSONField = None
-
-
 # coreapi is optional (Note that uritemplate is a dependency of coreapi)
 try:
     import coreapi
@@ -325,11 +270,6 @@ def md_filter_add_syntax_highlight(md):
     LONG_SEPARATORS = (b', ', b': ')
     INDENT_SEPARATORS = (b',', b': ')
 
-try:
-    # DecimalValidator is unavailable in Django < 1.9
-    from django.core.validators import DecimalValidator
-except ImportError:
-    DecimalValidator = None
 
 class CustomValidatorMessage(object):
     """
@@ -371,6 +311,7 @@ def set_rollback():
         pass
 
 
+# TODO: Remove
 def template_render(template, context=None, request=None):
     """
     Passing Context or RequestContext to Template.render is deprecated in 1.9+,
@@ -393,6 +334,7 @@ def template_render(template, context=None, request=None):
         return template.render(context, request=request)
 
 
+# TODO: Remove
 def set_many(instance, field, value):
     if django.VERSION < (1, 10):
         setattr(instance, field, value)
@@ -401,6 +343,7 @@ def set_many(instance, field, value):
         field.set(value)
 
 
+# TODO: Remove
 def include(module, namespace=None, app_name=None):
     from django.conf.urls import include
     if django.VERSION < (1,9):

rest_framework/fields.py

@@ -33,7 +33,7 @@
 from rest_framework.compat import (
     InvalidTimeError, MaxLengthValidator, MaxValueValidator,
     MinLengthValidator, MinValueValidator, get_remote_field, unicode_repr,
-    unicode_to_repr, value_from_object
+    unicode_to_repr
 )
 from rest_framework.exceptions import ErrorDetail, ValidationError
 from rest_framework.settings import api_settings
@@ -1840,7 +1840,7 @@ def get_attribute(self, obj):
         return obj
 
     def to_representation(self, obj):
-        value = value_from_object(self.model_field, obj)
+        value = self.model_field.value_from_object(obj)
         if is_protected_type(value):
             return value
         return self.model_field.value_to_string(obj)

rest_framework/permissions.py

@@ -6,7 +6,6 @@
 from django.http import Http404
 
 from rest_framework import exceptions
-from rest_framework.compat import is_authenticated
 
 SAFE_METHODS = ('GET', 'HEAD', 'OPTIONS')
 
@@ -47,7 +46,7 @@ class IsAuthenticated(BasePermission):
     """
 
     def has_permission(self, request, view):
-        return request.user and is_authenticated(request.user)
+        return request.user and request.user.is_authenticated
 
 
 class IsAdminUser(BasePermission):
@@ -68,7 +67,7 @@ def has_permission(self, request, view):
         return (
             request.method in SAFE_METHODS or
             request.user and
-            is_authenticated(request.user)
+            request.user.is_authenticated
         )
 
 
@@ -136,7 +135,7 @@ def has_permission(self, request, view):
             return True
 
         if not request.user or (
-           not is_authenticated(request.user) and self.authenticated_users_only):
+           not request.user.is_authenticated and self.authenticated_users_only):
             return False
 
         queryset = self._queryset(view)

rest_framework/serializers.py

@@ -27,8 +27,7 @@
 from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
 
-from rest_framework.compat import JSONField as ModelJSONField
-from rest_framework.compat import postgres_fields, set_many, unicode_to_repr
+from rest_framework.compat import set_many, unicode_to_repr
 from rest_framework.exceptions import ErrorDetail, ValidationError
 from rest_framework.fields import get_error_detail, set_value
 from rest_framework.settings import api_settings
@@ -46,6 +45,17 @@
     UniqueTogetherValidator
 )
 
+try:
+    from django.contrib.postgres import fields as postgres_fields
+except ImportError:
+    postgres_fields = None
+
+try:
+    from django.contrib.postgres.fields import JSONField as ModelJSONField
+except ImportError:
+    ModelJSONField = None
+
+
 # Note: We do the following so that users of the framework can use this style:
 #
 #     example_field = serializers.CharField(...)

rest_framework/throttling.py

@@ -8,7 +8,6 @@
 from django.core.cache import cache as default_cache
 from django.core.exceptions import ImproperlyConfigured
 
-from rest_framework.compat import is_authenticated
 from rest_framework.settings import api_settings
 
 
@@ -174,7 +173,7 @@ class AnonRateThrottle(SimpleRateThrottle):
     scope = 'anon'
 
     def get_cache_key(self, request, view):
-        if is_authenticated(request.user):
+        if request.user.is_authenticated:
             return None  # Only throttle unauthenticated requests.
 
         return self.cache_format % {
@@ -194,7 +193,7 @@ class UserRateThrottle(SimpleRateThrottle):
     scope = 'user'
 
     def get_cache_key(self, request, view):
-        if is_authenticated(request.user):
+        if request.user.is_authenticated:
             ident = request.user.pk
         else:
             ident = self.get_ident(request)
@@ -242,7 +241,7 @@ def get_cache_key(self, request, view):
         Otherwise generate the unique cache key by concatenating the user id
         with the '.throttle_scope` property of the view.
         """
-        if is_authenticated(request.user):
+        if request.user.is_authenticated:
             ident = request.user.pk
         else:
             ident = self.get_ident(request)

rest_framework/utils/field_mapping.py

@@ -8,9 +8,13 @@
 from django.db import models
 from django.utils.text import capfirst
 
-from rest_framework.compat import DecimalValidator, JSONField
 from rest_framework.validators import UniqueValidator
 
+try:
+    from django.contrib.postgres.fields import JSONField
+except ImportError:
+    JSONField = None
+
 NUMERIC_FIELD_TYPES = (
     models.IntegerField, models.FloatField, models.DecimalField
 )
@@ -182,10 +186,10 @@ def get_field_kwargs(field_name, model_field):
             ]
         # Our decimal validation is handled in the field code, not validator code.
         # (In Django 1.9+ this differs from previous style)
-        if isinstance(model_field, models.DecimalField) and DecimalValidator:
+        if isinstance(model_field, models.DecimalField):
             validator_kwarg = [
                 validator for validator in validator_kwarg
-                if not isinstance(validator, DecimalValidator)
+                if not isinstance(validator, validators.DecimalValidator)
             ]
 
     # Ensure that max_length is passed explicitly as a keyword arg,

rest_framework/utils/model_meta.py

@@ -7,7 +7,7 @@
 """
 from collections import OrderedDict, namedtuple
 
-from rest_framework.compat import get_related_model, get_remote_field
+from rest_framework.compat import get_remote_field
 
 FieldInfo = namedtuple('FieldResult', [
     'pk',  # Model field instance
@@ -53,7 +53,7 @@ def _get_pk(opts):
 
     while rel and rel.parent_link:
         # If model is a child via multi-table inheritance, use parent's pk.
-        pk = get_related_model(pk)._meta.pk
+        pk = pk.remote_field.model._meta.pk
         rel = get_remote_field(pk)
 
     return pk
@@ -79,7 +79,7 @@ def _get_forward_relationships(opts):
     for field in [field for field in opts.fields if field.serialize and get_remote_field(field)]:
         forward_relations[field.name] = RelationInfo(
             model_field=field,
-            related_model=get_related_model(field),
+            related_model=field.remote_field.model,
             to_many=False,
             to_field=_get_to_field(field),
             has_through_model=False,
@@ -90,7 +90,7 @@ def _get_forward_relationships(opts):
     for field in [field for field in opts.many_to_many if field.serialize]:
         forward_relations[field.name] = RelationInfo(
             model_field=field,
-            related_model=get_related_model(field),
+            related_model=field.remote_field.model,
             to_many=True,
             # manytomany do not have to_fields
             to_field=None,

rest_framework/utils/representation.py

@@ -10,13 +10,18 @@
 from django.utils.encoding import force_text
 from django.utils.functional import Promise
 
-from rest_framework.compat import get_names_and_managers, unicode_repr
+from rest_framework.compat import unicode_repr
 
 
 def manager_repr(value):
     model = value.model
     opts = model._meta
-    for manager_name, manager_instance in get_names_and_managers(opts):
+    names_and_managers = [
+        (manager.name, manager)
+        for manager
+        in opts.managers
+    ]
+    for manager_name, manager_instance in names_and_managers:
         if manager_instance == value:
             return '%s.%s.all()' % (model._meta.object_name, manager_name)
     return repr(value)

tests/test_authentication.py

@@ -20,7 +20,6 @@
     TokenAuthentication)
 from rest_framework.authtoken.models import Token
 from rest_framework.authtoken.views import obtain_auth_token
-from rest_framework.compat import is_authenticated
 from rest_framework.response import Response
 from rest_framework.test import APIClient, APIRequestFactory
 from rest_framework.views import APIView
@@ -450,7 +449,7 @@ class AuthAccessingRenderer(renderers.BaseRenderer):
 
             def render(self, data, media_type=None, renderer_context=None):
                 request = renderer_context['request']
-                if is_authenticated(request.user):
+                if request.user.is_authenticated:
                     return b'authenticated'
                 return b'not authenticated'
 

tests/test_request.py

@@ -16,7 +16,6 @@
 
 from rest_framework import status
 from rest_framework.authentication import SessionAuthentication
-from rest_framework.compat import is_anonymous
 from rest_framework.parsers import BaseParser, FormParser, MultiPartParser
 from rest_framework.request import Request
 from rest_framework.response import Response
@@ -201,9 +200,9 @@ def test_user_can_login(self):
 
     def test_user_can_logout(self):
         self.request.user = self.user
-        self.assertFalse(is_anonymous(self.request.user))
+        self.assertFalse(self.request.user.is_anonymous)
         logout(self.request)
-        self.assertTrue(is_anonymous(self.request.user))
+        self.assertTrue(self.request.user.is_anonymous)
 
     def test_logged_in_user_is_set_on_wrapped_request(self):
         login(self.request, self.user)

tests/test_requests_client.py

@@ -10,7 +10,7 @@
 from django.utils.decorators import method_decorator
 from django.views.decorators.csrf import csrf_protect, ensure_csrf_cookie
 
-from rest_framework.compat import is_authenticated, requests
+from rest_framework.compat import requests
 from rest_framework.response import Response
 from rest_framework.test import APITestCase, RequestsClient
 from rest_framework.views import APIView
@@ -72,7 +72,7 @@ def post(self, request):
 class AuthView(APIView):
     @method_decorator(ensure_csrf_cookie)
     def get(self, request):
-        if is_authenticated(request.user):
+        if request.user.is_authenticated:
             username = request.user.username
         else:
             username = None