Upgrade Django from 1.8.x to 1.11

Django 1.11 is the next LTS release of Django and the last release to
support Python 2. Luckily, Django 1.11 will be supported with security
updates until sometime in 2020 so there's no immediate rush to rewrite
everything to Python 3 just yet.

Still, Django 1.8 will soon stop getting security updates, so upgrading
to Django 1.11 now means it will still be easy to take in new Django
Security fixes.

Migrating was fairly straight-forward, and involved reading the release
notes of Django 1.9, 1.10 and 1.11, as well as upgrading any third-party
libs that had released compatibility updates for Django 1.11:

- https://docs.djangoproject.com/en/1.11/releases/1.9/
- https://docs.djangoproject.com/en/1.11/releases/1.10/
- https://docs.djangoproject.com/en/1.11/releases/1.11/

dwitter/dweet/views.py

@@ -1,14 +1,11 @@
 from django.shortcuts import get_object_or_404, render
 from dwitter.models import Dweet
 from django.views.decorators.clickjacking import xframe_options_exempt
-from django.shortcuts import render_to_response
-from django.template import RequestContext
 from django.views.decorators.cache import cache_page
 
 
 def handler404(request):
-    response = render_to_response('404_dweet.html', {},
-                                  context_instance=RequestContext(request))
+    response = render(request, '404_dweet.html')
     response.status_code = 404
     return response
 

dwitter/feed/views.py

@@ -58,7 +58,7 @@ def get_queryset(self):
             queryset
             .select_related('author')
             .select_related('reply_to')
-            .select_related('reply_to__author__username')
+            .select_related('reply_to__author')
             .prefetch_related('comments'))
 
         return queryset

dwitter/settings/base.py

@@ -29,14 +29,6 @@
 ALLOWED_HOSTS = []
 
 
-TEMPLATES = [
-        {
-            'BACKEND': 'django.template.backends.django.DjangoTemplates',
-            'APP_DIRS': True,
-            },
-        ]
-
-
 # Application definition
 
 INSTALLED_APPS = [
@@ -62,15 +54,16 @@
     'corsheaders',
 ]
 
-DBBACKUP_STORAGE = 'dbbackup.storage.filesystem_storage'
+DBBACKUP_STORAGE = 'django.core.files.storage.FileSystemStorage'
 DBBACKUP_STORAGE_OPTIONS = {'location': 'backups'}
 
 REST_FRAMEWORK = {
     'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.LimitOffsetPagination',
-    'DEFAULT_FILTER_BACKENDS': ('rest_framework.filters.DjangoFilterBackend',),
+    'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',),
     'PAGE_SIZE': 10,                   # Default to 10
     'MAX_PAGE_SIZE': 100,             # Maximum limit allowed when using `?page_size=xxx`.
     'DEFAULT_RENDERER_CLASSES': ('rest_framework.renderers.JSONRenderer',),
+
 }
 
 # List of callables that know how to import templates from various sources.
@@ -80,7 +73,7 @@
 #            # 'django.template.loaders.eggs.Loader',
 #            )
 
-MIDDLEWARE_CLASSES = [
+MIDDLEWARE = [
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'subdomains.middleware.SubdomainURLRoutingMiddleware',
@@ -113,7 +106,6 @@
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
-                'django.core.context_processors.request',
             ],
         },
     },

requirements.txt

@@ -1,14 +1,14 @@
 boto==2.42
 django-anymail==4.3
-django-compressor==2.1
-django-dbbackup==2.5.0
+django-compressor==2.2
+django-dbbackup==3.0.2
 django-debug-toolbar==1.9.1
-django-filter==0.13
-django-registration-redux==1.2
+django-filter==1.1
+django-registration-redux==1.8
 django-storages-redux==1.3.2
 django-subdomains==2.1.0rc0
-django==1.8.14
-djangorestframework==3.3.3
+django==1.11.15
+djangorestframework==3.7.1
 flake8==2.6.2
 newrelic==4.2.0.100
 django-cors-headers==2.4.0