Fix template.render deprecation warnings for 1.9+

Author: andreif

rest_framework/compat.py

@@ -9,6 +9,7 @@
 import django
 from django.conf import settings
 from django.db import connection, transaction
+from django.template import Context, RequestContext, Template
 from django.utils import six
 from django.views.generic import View
 
@@ -191,6 +192,7 @@ def apply_markdown(text):
 except ImportError:
     DecimalValidator = None
 
+
 def set_rollback():
     if hasattr(transaction, 'set_rollback'):
         if connection.settings_dict.get('ATOMIC_REQUESTS', False):
@@ -206,3 +208,25 @@ def set_rollback():
     else:
         # transaction not managed
         pass
+
+
+def template_render(template, context=None, request=None):
+    """
+    Passing Context or RequestContext to Template.render is deprecated in 1.9+,
+    see https://github.com/django/django/pull/3883 and
+    https://github.com/django/django/blob/1.9rc1/django/template/backends/django.py#L82-L84
+
+    :param template: Template instance
+    :param context: dict
+    :param request: Request instance
+    :return: rendered template as SafeText instance
+    """
+    if django.VERSION < (1, 9) or isinstance(template, Template):
+        if request:
+            context = RequestContext(request, context)
+        else:
+            context = Context(context)
+        return template.render(context)
+    # backends template, e.g. django.template.backends.django.Template
+    else:
+        return template.render(context, request=request)

rest_framework/filters.py

@@ -10,12 +10,12 @@
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.db import models
-from django.template import Context, loader
+from django.template import loader
 from django.utils import six
 from django.utils.translation import ugettext_lazy as _
 
 from rest_framework.compat import (
-    crispy_forms, distinct, django_filters, guardian
+    crispy_forms, distinct, django_filters, guardian, template_render
 )
 from rest_framework.settings import api_settings
 
@@ -122,11 +122,11 @@ def to_html(self, request, queryset, view):
             filter_instance = filter_class(request.query_params, queryset=queryset)
         else:
             filter_instance = None
-        context = Context({
+        context = {
             'filter': filter_instance
-        })
+        }
         template = loader.get_template(self.template)
-        return template.render(context)
+        return template_render(template, context)
 
 
 class SearchFilter(BaseFilterBackend):
@@ -185,12 +185,12 @@ def to_html(self, request, queryset, view):
 
         term = self.get_search_terms(request)
         term = term[0] if term else ''
-        context = Context({
+        context = {
             'param': self.search_param,
             'term': term
-        })
+        }
         template = loader.get_template(self.template)
-        return template.render(context)
+        return template_render(template, context)
 
 
 class OrderingFilter(BaseFilterBackend):
@@ -284,8 +284,8 @@ def get_template_context(self, request, queryset, view):
 
     def to_html(self, request, queryset, view):
         template = loader.get_template(self.template)
-        context = Context(self.get_template_context(request, queryset, view))
-        return template.render(context)
+        context = self.get_template_context(request, queryset, view)
+        return template_render(template, context)
 
 
 class DjangoObjectPermissionsFilter(BaseFilterBackend):

rest_framework/pagination.py

@@ -10,11 +10,12 @@
 
 from django.core.paginator import Paginator as DjangoPaginator
 from django.core.paginator import InvalidPage
-from django.template import Context, loader
+from django.template import loader
 from django.utils import six
 from django.utils.six.moves.urllib import parse as urlparse
 from django.utils.translation import ugettext_lazy as _
 
+from rest_framework.compat import template_render
 from rest_framework.exceptions import NotFound
 from rest_framework.response import Response
 from rest_framework.settings import api_settings
@@ -273,8 +274,8 @@ def page_number_to_url(page_number):
 
     def to_html(self):
         template = loader.get_template(self.template)
-        context = Context(self.get_html_context())
-        return template.render(context)
+        context = self.get_html_context()
+        return template_render(template, context)
 
 
 class LimitOffsetPagination(BasePagination):
@@ -389,8 +390,8 @@ def page_number_to_url(page_number):
 
     def to_html(self):
         template = loader.get_template(self.template)
-        context = Context(self.get_html_context())
-        return template.render(context)
+        context = self.get_html_context()
+        return template_render(template, context)
 
 
 class CursorPagination(BasePagination):
@@ -692,5 +693,5 @@ def get_html_context(self):
 
     def to_html(self):
         template = loader.get_template(self.template)
-        context = Context(self.get_html_context())
-        return template.render(context)
+        context = self.get_html_context()
+        return template_render(template, context)

rest_framework/renderers.py

@@ -15,13 +15,13 @@
 from django.core.exceptions import ImproperlyConfigured
 from django.core.paginator import Page
 from django.http.multipartparser import parse_header
-from django.template import Context, RequestContext, Template, loader
+from django.template import Template, loader
 from django.test.client import encode_multipart
 from django.utils import six
 
 from rest_framework import VERSION, exceptions, serializers, status
 from rest_framework.compat import (
-    INDENT_SEPARATORS, LONG_SEPARATORS, SHORT_SEPARATORS
+    INDENT_SEPARATORS, LONG_SEPARATORS, SHORT_SEPARATORS, template_render
 )
 from rest_framework.exceptions import ParseError
 from rest_framework.request import is_form_media_type, override_method
@@ -168,15 +168,15 @@ def render(self, data, accepted_media_type=None, renderer_context=None):
             template = self.resolve_template(template_names)
 
         context = self.resolve_context(data, request, response)
-        return template.render(context)
+        return template_render(template, context, request=request)
 
     def resolve_template(self, template_names):
         return loader.select_template(template_names)
 
     def resolve_context(self, data, request, response):
         if response.exception:
             data['status_code'] = response.status_code
-        return RequestContext(request, data)
+        return data
 
     def get_template_names(self, response, view):
         if response.template_name:
@@ -230,7 +230,7 @@ def render(self, data, accepted_media_type=None, renderer_context=None):
             request = renderer_context['request']
             template = self.get_exception_template(response)
             context = self.resolve_context(data, request, response)
-            return template.render(context)
+            return template_render(template, context, request=request)
 
         return data
 
@@ -333,8 +333,8 @@ def render_field(self, field, parent_style):
             template_name = style['template_pack'].strip('/') + '/' + style['base_template']
 
         template = loader.get_template(template_name)
-        context = Context({'field': field, 'style': style})
-        return template.render(context)
+        context = {'field': field, 'style': style}
+        return template_render(template, context)
 
     def render(self, data, accepted_media_type=None, renderer_context=None):
         """
@@ -350,11 +350,11 @@ def render(self, data, accepted_media_type=None, renderer_context=None):
         template_pack = style['template_pack'].strip('/')
         template_name = template_pack + '/' + self.base_template
         template = loader.get_template(template_name)
-        context = Context({
+        context = {
             'form': form,
             'style': style
-        })
-        return template.render(context)
+        }
+        return template_render(template, context)
 
 
 class BrowsableAPIRenderer(BaseRenderer):
@@ -600,8 +600,8 @@ def get_filter_form(self, data, view, request):
             return
 
         template = loader.get_template(self.filter_template)
-        context = Context({'elements': elements})
-        return template.render(context)
+        context = {'elements': elements}
+        return template_render(template, context)
 
     def get_context(self, data, accepted_media_type, renderer_context):
         """
@@ -672,8 +672,7 @@ def render(self, data, accepted_media_type=None, renderer_context=None):
 
         template = loader.get_template(self.template)
         context = self.get_context(data, accepted_media_type, renderer_context)
-        context = RequestContext(renderer_context['request'], context)
-        ret = template.render(context)
+        ret = template_render(template, context, request=renderer_context['request'])
 
         # Munge DELETE Response code to allow us to return content
         # (Do this *after* we've rendered the template so that we include
@@ -709,8 +708,7 @@ def render(self, data, accepted_media_type=None, renderer_context=None):
 
         template = loader.get_template(self.template)
         context = self.get_context(data, accepted_media_type, renderer_context)
-        context = RequestContext(renderer_context['request'], context)
-        ret = template.render(context)
+        ret = template_render(template, context, request=renderer_context['request'])
 
         # Creation and deletion should use redirects in the admin style.
         if (response.status_code == status.HTTP_201_CREATED) and ('Location' in response):

rest_framework/templatetags/rest_framework.py

@@ -4,12 +4,13 @@
 
 from django import template
 from django.core.urlresolvers import NoReverseMatch, reverse
-from django.template import Context, loader
+from django.template import loader
 from django.utils import six
 from django.utils.encoding import force_text, iri_to_uri
 from django.utils.html import escape, format_html, smart_urlquote
 from django.utils.safestring import SafeData, mark_safe
 
+from rest_framework.compat import template_render
 from rest_framework.renderers import HTMLFormRenderer
 from rest_framework.utils.urls import replace_query_param
 
@@ -128,12 +129,12 @@ def format_value(value):
             template = loader.get_template('rest_framework/admin/list_value.html')
         else:
             template = loader.get_template('rest_framework/admin/simple_list_value.html')
-        context = Context({'value': value})
-        return template.render(context)
+        context = {'value': value}
+        return template_render(template, context)
     elif isinstance(value, dict):
         template = loader.get_template('rest_framework/admin/dict_value.html')
-        context = Context({'value': value})
-        return template.render(context)
+        context = {'value': value}
+        return template_render(template, context)
     elif isinstance(value, six.string_types):
         if (
             (value.startswith('http:') or value.startswith('https:')) and not