Saying Goodbye to Old Django
We recently wrote about our switch from TravisCI and Coveralls to CircleCI and CodeCov in How We Maintain High Levels of Code Quality.
In addition to adding Django 2.0 compatibility testing, we are dropping support for Django 1.8, 1.9, and 1.10 since their official support has ended. Python 3.3 has reached end of life and is removed from compatibility testing as well. Django 2.0 no longer supports Python 2, so that combination is also removed. This table shows the combinations of Django and Python supported by Pinax:
|Django \ Python||2.7||3.4||3.5||3.6|
About Automated Testing
We run detox locally to see which test configurations fail and why. In addition, we use isort for automated import sorting and flake8-quotes for enforcing our double quote standard.
Django 2.0 Deprecations
These are the most common deprecations we encountered when upgrading to Django 2.0 as well as their resolutions.
from django.core.urlresolvers import reverse
from django.urls import reverse
settings.py, we change
MIDDLEWARE per the 1.11 docs.
django.shortcuts.render_to_response() method is deprecated in favor of
We change references to
User.is_anonymous() to property references (
We remove references to
This middleware is no longer needed since session authentication is unconditionally enabled in Django 1.10+.
We change out
Django 2.0 Updates
These are the most common updates we made when upgrading to Django 2.0:
on_delete=models.CASCADE (or some other value) to all
OneToOne model fields. This is required for Django 2.0.
In reusable apps that could be used for both 1.11 and 2.0 we create a
compat.py module, if needed.
Currently the only import issue we know is
mock which did not exist in Python standard library unittest until Python 3.3. See
pinax-announcements‘s compat.py for example imports, then use
from .compat import mock.
9. URL namespacing
We need to add
app_name = "pinax_announcements" or similar to
from django.conf.urls import url from . import views urlpatterns = [ url(r"^like/(?P<content_type_id>\d+):(?P<object_id>\d+)/$", views.LikeToggleView.as_view(), name="like_toggle") ]
from django.conf.urls import url from . import views app_name = "pinax_likes" urlpatterns = [ url(r"^like/(?P<content_type_id>\d+):(?P<object_id>\d+)/$", views.LikeToggleView.as_view(), name="like_toggle") ]
10. Use of
path() in Projects
For new applications not requiring Django 1.11 compatibility we use
path so we can write url definitions like this:
from django.urls import path from . import views app_name = "pinax_likes" urlpatterns = [ path("^like/<int:content_type_id>:<int:object_id>/$", views.LikeToggleView.as_view(), name="like_toggle") ]
There might be other issues to consider as you upgrade your site or app. These are just the ones we’ve come across so far while updating ours. For the full list of new features and changes in Django 2.0, see the official release notes.
If you need help, upgrading your site or building something new, don’t hesitate to let us know.