Django community: Community blog posts RSS
This page, updated regularly, aggregates Community blog posts from the Django community.
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Update Django template fragment caches in the background
The title of this post is what I originally tried to do, but the solution to the problem was to do a small refactoring and to use the low level cache API. This post will explain how I modified my approach after thinking about the problem for a while. -
Django Log In with Email not Username
Django was first released in 2005 and since then a lot has changed in web development, notably the predominant pattern at the time of using username/email/password has been simplified to … -
Announcing a Regional Discount for “Speed Up Your Django Tests”
Since I launched my book Speed Up Your Django Tests I’ve had a number of questions about possible discounts. I want to make my book affordable for all and understand that $49 is a high price tag for some. The Django community is global and I want to share knowledge with Djangonauts everywhere. So today I’m glad to announce a 50% discount for those living outside of the Top 50 Countries by GDP per capita*. Please email me with the address on my contact details page to say hi, where you live, and what you’re making with Django, and I’ll send you the discount link. (*According to the IMF 2020 table of countries’ GDP on this Wikipedia page.) I’d like to take a finer grained approach in the future, but currently Gumroad don’t offer region-targeted pricing. So I either need them to build such a feature, or create an integration using their API (and I’d rather spend more time writing). Fin Thanks to all my readers so far, —Adam -
Django News - Django 3.1 Preview - Jul 10th 2020
News Python Release 3.9.0b4 The fourth of five planned beta release previews with major new 3.9 features. python.org Events Django London Virtual Meetup on July 14th Looking for a virtual meetup to attend next week? Join Django London on July 14th featuring a talk by Django co-creator Simon Willison. meetup.com What's coming next in Wagtail? on July 15th This webinar is for anyone managing a Wagtail site, using Wagtail as an editor, developing Wagtail sites or evaluating Wagtail for a future project. zoom.us San Francisco Django Virtual Meetup on July 23rd We brought together over 160 people in our last nationwide virtual Django meetup. We're looking to go even bigger this time. Just because DjangoCon 2020 is canceled doesn't mean the show can't go on. meetup.com Articles What's New in Django 3.1? Coming in early August, async views/middleware/tests, cross-db JSONFields, updated admin, and more. learndjango.com PyDev of the Week: Philip James Philip James (@phildini) has spoken at various PyCons and DjangoCons and is the PyDev of the Week! pythonlibrary.org Refining exceptions with Context Decorators An elegant way to add more descriptive exceptions via context decorators. dev.to Arrange-Act-Assert: A Pattern for Writing Good Tests A handy way to reason about tests … -
Enrolling Students - Building SaaS #64
In this episode, we worked on a view to enroll students into a grade level for the school year. I added all the context data and used Tailwind to design the form layout to pick from a list of available grade levels. We added a variety of unit tests to prove the correctness. The enrollment page needed three pieces of data in the context to complete the form. We added the student, school_year, and grade_levels data to the context and wrote tests to show the data in there. -
Aymeric Augustin
Aymeric personal siteFractal Ideas blogAymeric on Githubdjango-sesamedjango-sequenceswebsocketsSHAMELESS PLUGSLearnDjango - Free tutorials and premium books -
What's New in Django 3.1?
Django 3.1 will be released in early August 2020 and comes a number of major new features and many minor improvements including asychnronous views and middleware support, asynchronous tests, JSONField … -
Too many Invalid HTTP_HOST header exception errors
Have you deployed an application to production? Are you getting too many, seemingly random Invalid HTTP_HOST header exception errors? Background I have recently deployed a Django app: served via gunicorn/Nginx onto an AWS Lightsail instance with a CloudFlare certificate for https/SSL (followed this answer on StackOverflow for configuring it) Following deployment I had a barrage of Invalid HTTP_HOST header error emails. Every. Single. Day. I looked at the Nginx configuration. But it looked identical to other configurations I have in production. Configurations that do not have this kind of error. The Nginx server block looks like: upstream dbr_project { server unix:/home/ubuntu/[..]/gunicorn.sock fail_timeout=0; } server { listen 80 default_server; listen [::]:80 default_server; server_name subdomain.example.com; if ($http_x_forwarded_proto = "http") { return 301 https://$server_name$request_uri; } ... } On further inspection, these exceptions were being caused by bots. Example user agent strings: HTTP_USER_AGENT = 'Mozilla/5.0 (compatible; Nimbostratus-Bot/v1.3.2; http://cloudsystemnetworks.com)' HTTP_USER_AGENT = 'masscan/1.0 (https://github.com/robertdavidgraham/masscan)' So the cause looks external. And the “dirty” fix I resorted to is to stop reporting this class of error. Fix I’ve followed this answer on StackOverflow to stop reporting, or “suppress”, this error. My previous LOGGING config (which I stripped down to a bare minimum for this post) looked like: 1 … -
Django Testing Toolbox
What are the tools that I use to test a Django app? Let’s find out! You might say I’m test obsessed. I like having very high automated test coverage. This is especially true when I’m working on solo applications. I want the best test safety net that I can have to protect me from myself. We’re going to explore the testing packages that I commonly use on Django projects. We’ll also look at a few of the important techniques that I apply to make my testing experience great. -
Django News - New Django & Python Releases - Jul 3rd 2020
News Django bugfix releases issued: 3.0.8 and 2.2.14 Another bugfix release for Django 3.0 and 2.2. Django 3.1 comes out in August! djangoproject.com Python 3.7.8 and 3.6.11 released The 3.7.8 is expected to be the last bugfix release for the 3.7.x series. Future releases will focus on security fixes. blogspot.com Python Software Foundation News: 2020 Python Software Foundation Board of Directors Election Retrospective and Next Steps blogspot.com Articles Making Django App Publicly Accessible With Ngrok Ngrok is a great way to share your local Django runserver with anyone you give the link to. It makes having demo or testing webhooks locally possible. dev.to Python async frameworks - Beyond developer tribalism From Tom Christie, creator of Django REST Framework, a thoughtful overview of the async Python landscape. encode.io Store Data With Models See how to take data and store it into a database so that your application can use that data or display it later. mattlayman.com How to add a .well-known URL to your Django site A quick guide to what /.well-known/ URLs are and how to create them. adamj.eu How to find what you want in the Django documentation Many beginner programmers find the Django documentation overwhelming. mattsegal.dev Lack of … -
I'm Teaching A Live Online Django Crash Course
Course Announcement On July 16th and 17th of 2020, I'll be running a live instruction of my beginner-friendly Django Crash Course. This is a live interactive class conducted via Zoom conferencing software. We're going to walk through the book together with students. If you get stuck, there will be at least two members of the Feldroy team available to help. Each course day will have two sessions each 3 hours long, as well as an hour-long break between sessions. Attendees Receive Hours of instruction in building web apps by noted authors and senior programmers An invite to both July 16th and July 17th class days The Django Crash Course e-book (if you already bought one, we'll send you a discount code for $19.99 off the online class) Membership in our forthcoming online forums when they are activated Class Prerequisites Basic knowledge of the Python programming language Computer where you are allowed to install software (No work restrictions) Internet fast enough to join online meetings Topics Covered Setting up a development environment Cookiecutter for rapidly accelerating development Django Forms Class-Based Views Models Templates Admin Writing Django tests PyTest Factories Best practices per Two Scoops of Django Proven patterns for avoiding duplication … -
Django Login and Logout Tutorial
In this tutorial we'll learn how to configure login/logout functionality with Django's the built-in [user authentication system](https://docs.djangoproject.com/en/3.0/topics/auth/). This is the first in a three-part series that also covers [signup](https://learndjango.com/tutorials/django-signup-tutorial) and … -
Django File (and Image) Uploads Tutorial
This tutorial shows how to implement file and then image uploading with Django. We'll build a basic Instagram clone. ## Setup If you're on a Mac the `Desktop` is a … -
Django Markdown Tutorial
[Markdown](https://daringfireball.net/projects/markdown/) is a popular text-to-HTML conversion tool for web writers. It is far easier to use than plain old HTML. Many/most static site generators provide a built-in way to write … -
Django Slug Tutorial
In this tutorial we will add slugs to a Django website. As noted in the [official docs](https://docs.djangoproject.com/en/3.0/ref/models/fields/#slugfield): "Slug is a newspaper term. A slug is a short label for something, … -
Django Best Practices: Function-Based Views vs Class-Based Views
Django's support of both function-based views and class-based views causes a lot of confusion for newcomers. Multiple ways to do the same thing? Which should I use? Within Django a … -
The Home Stretch - Building SaaS #63
In this episode, we return to the homeschool application that I’m building. I’m in the final stretch of changes that need to happen to make the product minimally viable. We worked on a template, wrote some model methods, and did a bunch of automated testing. We started by adding students to the context of the students index page. With the students in the context, we updated the index page to display the list of students. -
Do you need a task queue in your web app?
Within your web application, some operations, or “tasks”, take an unpredictable time to run. Others take too long to have them executed within the web application’s request/response cycle. Adding a task queue will allow you to: Run longer-running tasks outside the request-response cycle handled by web framework. Actually gunicorn or uwsgi in a production Django1 setup. Run scheduled tasks by not relying on crontab. This usually entails management commands or other forms of standalone scripts. Each needing all environment variables loaded correctly. Without a task queue Let’s say you want to send an email to a user when they submit a form. The process is shown below2: Figure 1. View sends email directly. No queue. This adds an unpredictable time to the expected response time. I.e. those 1-2 seconds taken to: talk to the email provider, over the network receive a response from the email provider, again over the network With a task queue With the task queue in place, the email sending part is done asynchronously. I.e. The unpredictable part is shifted onto the queue. And we don’t really care how long that takes; that is, for returing a response to the user. In case it fails, many task … -
Giving Django Project a “Two Scoops” Configuration
Years back I bought a physical copy of Two Scoops of Django 1.11 after seeing it highly recommended in a book called Hello Web App by Tracy Osborn.… -
Speed Up Your Django Tests - Adam Johnson
Adam Johnson personal siteSpeed Up Your Django TestsPyCon UK 2016: Cleaner unit testing with the Arrange Act Assert patternDjango Software Foundation Teamstime-machineSHAMELESS PLUGSLearnDjango - Free tutorials and premium books -
Django Static Files
Static files are a common source of confusion for Django newcomers. The term "static files" refers to files like CSS, JavaScript, or images that do not change in a web … -
Huey as a minimal task queue for Django
Are you considering adding a task quee to your Django project? Then this article should be useful to you. Adding a task queue will allow you to: Run longer-running processes outside the request-response cycle handled by Django. Actually gunicorn or uwsgi in production. Run scheduled tasks by not relying on crontab. This usually entails management commands or other forms of standalone scripts. Each needing all environment variables loaded correctly. When I was “younger” task queue with Django project meant celery task queue. Now that I’m “older” there are simpler alternatives. The simplest I found was Huey. But the ideas presented here apply to evaluating all task queues for your Django project. Background Frustrated with celery and django-celery In December 2019 I was taking a Django project from Python 2 to 3. This project relied on celery and its integration for Django for asynchronous task processing. Github project link here. This work was mostly done back in 2012-2015. celery’s “Django integration” part was the first problematic part. “Problematic” in the sense that it was not being actively maintained. And Python 3 support was only “planned” at the time. Besides, by testing celery with my Python3 setup I realised how “heavy” it … -
July 16th and 17 Live Instruction of our Django Crash Course
The authors of Two Scoops of Django are offering live instruction of the Django Crash Course. This isn't a live stream, but a Zoom-powered class that isn't going to be recorded. We're going to walk-through the book together with students. If you get stuck, there will be at least two members of the Feldroy team available to help. Each course day will be seven hours long, including an hour-long break for lunch. Attendees will receive: Hours of instruction in building web apps by noted authors and senior programmers An invite to both July 16th and July 17 class days The Django Crash Course e-book (if you already bought one, we'll send you a discount code for $19.99 off the online class) Membership in our forthcoming online forums Class prerequisites: Basic knowledge of the Python programming language Computer with permissions to install software Internet fast enough to join online meetings We're selling the course for the introductory price of just $99 and space is limited, so register today! -
July 16th and 17th Live Instruction of our Django Crash Course
The authors of Two Scoops of Django are offering live instruction of the Django Crash Course. This is a live interactive class conducted via Zoom conferencing software. We're going to walk-through the book together with students. If you get stuck, there will be at least two members of the Feldroy team available to help. Each course day will have two sessions each 3 hours long, as well as an hour long break between sessions. Attendees will receive: Hours of instruction in building web apps by noted authors and senior programmers An invite to both July 16th and July 17th class days, starting at 9AM PST (4PM UTC) The Django Crash Course e-book (if you already bought one, we'll send you a discount code for $19.99 off the online class) Membership in our forthcoming online forums when they are activated Class prerequisites: Basic knowledge of the Python programming language Computer where you are allowed to install software (No work restrictions) Internet fast enough to join online meetings Topics Covered: Setting up a development environment Cookiecutter for rapidly accelerating development Django Forms Class-Based Views Models Templates Admin Writing Django tests PyTest Factories Best Practices the Two Scoops of Django Way Proven patterns … -
Where Does the Data Go?
Full show notes are available at https://www.mattlayman.com/django-riffs/6.
