Django community: Community blog posts RSS
This page, updated regularly, aggregates Community blog posts from the Django community.
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Deserializing Django objects and many to many relationships
I recently had to restore some data from backups, and was using Django serializers to get the job done. Objects of one class were not deleted, but the relationships were set to None when the related objects were deleted. Here's how I restored the relationship information. -
Learn Python By Example - Currency Exchange
Learn Python By Example shows a simple Python exercise from Exercism. This problem illustrates numbers in Python and how to use the built-in math operators. Since this is the first video in this series, I also take a bit of time to show how to use Exercism along the way in case you would like to learn using Exercism as well. -
Django News - Django-related Deals for Black Friday and Cyber Monday 2022 - Nov 25th 2022
News Django-related Deals for Black Friday and Cyber Monday 2022 Eight different Django content creators or having deals right now. Check it out! adamj.eu Join DEFNA! Board Member Recruitment DEFNA (Django Events Foundation North America), not to be confused with the DSF (Django Software Foundation), is looking for another board member. Applications are due December 3rd. defna.org Sponsored Ad Lifetime License of SaaS Pegasus 50% Off This Week Only SaaS Pegasus is a Django boilerplate with built-in teams, billing, a modern front end, instant deployment and more. This week only you can get a lifetime license for Pegasus on unlimited sites for 50% off. See why more than 500 django developers have chosen Pegasus, and launch your next app faster than you dreamed possible. saaspegasus.com Events PyCon US on Twitter: Join the #PyConUS 2023 team by volunteering for our Online Experience Committee! Have some extra time to give? Join the #PyConUS 2023 team by volunteering for our Online Experience Committee! We are looking for helpful humans to help us run the #PyConUS 2023 virtual platform, Hubilo. twitter.com Articles PyDev of the Week: Sarah Abderemane Sarah is very active in Django and has recently been working to add a dark mode … -
2022 Malcolm Tredinnick Memorial Prize
The Django Software Foundation awarded me the 2022 Malcolm Tredinnick Memorial Prize. -
Django Settings Patterns to Avoid
This post is an adapted extract from my book Boost Your Django DX, available now. It has a 50% discount for the Black Friday sale, until the end of Cyber Monday (28th Nov), plus a further 50% off for those outside the GDP top 50. Here are some potential mistakes made with Django settings that you can avoid. Don’t Read Settings at Import Time Python doesn’t make a distinction between import time and run time. As such, it’s possible to read settings at import time, but this can lead to subtle bugs. Reading a setting at import time will use or copy its initial value, and will not account for any later changes. Settings don’t often change, but when they do, you definitely want to use the new value. For example, take this views file: from django.conf import settings ... page_size = settings.PAGE_SIZE def book_list(request): paginator = Paginator(Book.objects.all(), page_size) ... page_size is set to the value of the setting once, at import time. It won’t account for any changes made in tests, such as with override_settings: from django.test import TestCase, override_settings class BookListTests(TestCase): def test_pagination(self): with override_settings(PAGE_SIZE=2): response = self.client.get(...) The previous view code would not use the changed PAGE_SIZE … -
Butter CMS - Jake Lumetta
ButterCMSButterCMS Job Openings@jakelumettaSupport the ShowThis podcast does not have any ads or sponsors. To support the show, please consider purchasing a book, signing up for Button, or reading the Django News newsletter. -
Django-related Deals for Black Friday and Cyber Monday 2022
Here are some Django-related deals for this year’s Black Friday (25th Nov) and Cyber Monday (28th Nov), including my own. My books My two books, Boost Your Django DX and Speed Up Your Django Tests, have 50% off their base prices. The deal stacks with the regional discount that offers a 50% discount for those living outside the GDP top 50. If you live in such a country, email me to get a total of 75% off the base prices. This discount is available until the end of Cyber Monday, “Anywhere on Earth” (AoE). That is, it’s live as long as it’s still Cyber Monday or before, in one time zone, anywhere on earth. Buy now: Boost Your Django DX Speed Up Your Django Tests (You can buy both in one transaction by clicking “Buy this” on one, then “Continue shopping” at the top right, which will let you add the other to your cart.) William Vincent’s Three Book Bundle William Vincent is the author of three fantastic Django books: Django for Beginners Django for APIs Django for Professionals He’s offering a 50% discount on the three book bundle, from $97 to $49. Buy it on Gumroad testdriven.io Four Course … -
Django News - 2023 Django Software Foundation Board Candidates - Nov 18th 2022
News 2023 DSF Board Candidates There are thirty candidates for the upcoming 2023 Django Software Foundation Board, the non-profit behind Django. DSF Individual Members vote on them. djangoproject.com Wagtail 4.1.1 Wagtail 4.1.1 fixes almost a dozen bugs. github.com Django Technical Board: Project Ideas, and beginning GSoC 2023. The 2023 Google Summer of Code has been announced and Django Fellow Carlton Gibson is soliciting input on project ideas. google.com Python 3.12.0 alpha 2 released Python 3.12.0a2 is the second of seven planned alpha releases. python.org Acceptable Use Policy · PyPI The Python Package Index (PyPI) added an Acceptable Use Policy. pypi.org Sponsored Ad Now Hiring Software Engineers Are you interested in building the next generation MLOPS Platform in Django? Apply today! Ampsight, Inc. is a small but quickly growing government services technology company located in Ashburn, Virginia, recently recognized by Inc. 5000 as one of the fastest growing companies in the United States. trinethire.com Articles Contributing to Django or how I learned to stop worrying and just try to fix an ORM Bug From attending the DjangoCon US sprints to tackling an ORM bug, Ryan Cheley walks us through the entire process. ryancheley.com Towards Inbox Zero: An update on Django's open … -
Development Cached Templates - Building SaaS with Python and Django #150
In this episode, I ran through a Python exercise on Exercism that focused on strings. Then we moved onto the homeschool app and fixed an issue with templates that were cached during development because of changes in Django 4.1. -
Intervista Pythonista - Ep 31
Python Milano presents Intervista Pythonista. We give a voice to Italian Pythonistas and get to know them closely with short interviews. Presented by Marco Santoni and Cesare Placanica. -
unittest’s new context methods in Python 3.11 (with backports)
Python 3.11 only made one change to unittest, but it’s a good one: context manager methods. These methods can simplify setup and teardown logic in many cases, such as dynamic use of unittest.mock. In this post we’ll look at a couple fo examples using the new methods, and a backport you can copy-paste into your projects, in plain and Django flavours. A time-saving example Take this test case, which uses my time-mocking library time-machine to fix the current microsecond to 0 (for whatever reason): import datetime as dt from unittest import TestCase import time_machine class ExampleTests(TestCase): def setUp(self): now = dt.datetime.now().replace(microsecond=0) self.traveller = time_machine.travel(now) self.traveller.start() self.addCleanup(self.traveller.stop) super().setUpClass() def test_microsecond(self): self.assertEqual(dt.datetime.now().microsecond, 0) It takes three steps to set up the mocking: Create a “traveller” by calling time_machine.travel(). Make it mock time by calling its start() start method. Schedule un-mocking by passing its stop() method to addCleanup(). This is verbose. Plus, it’s all too easy to too easy to forget the cleanup step, leading to test pollution. You can merge those three steps into one with Python 3.11’s enterContext() method: import datetime as dt from unittest import TestCase import time_machine class ExampleTests(TestCase): def setUp(self): now = dt.datetime.now().replace(microsecond=0) self.traveller = self.enterContext(time_machine.travel(now)) super().setUpClass() def … -
Moving data including deletions between the same Django app running in different environments
Moving data including deletions between the same Django app running in different environments Many projects use different environments to stabilize the code; they have a production environment which is actually seen by users, a stage where code is tested in an environment close to production and maybe several additional environments where more experimental code is published or developed, either on internal or protected webservers or maybe on the workstations of developers themselves. The same process may be desired for content; an environment where the content lives which is seen by users and other environments where the content can be changed without impacting the production environment. When using Django and the Django admin site there is no ready-made solution for doing this and maybe there shouldn’t be. Django’s serialization framework and its shortcomings for the use case outlined above Django comes with a serialization framework and with the dumpdata and loaddata management commands which can be used to dump and load data, e.g. to and from JSON. It’s also easily possible to specify a list of primary keys on the command line if you only want to dump a subset of the existing data. When loading this subset data which isn’t … -
Django News - Detecting N+1 Issues - Nov 11th 2022
Sponsored Ad Now Hiring Software Engineers Are you interested in building the next generation MLOPS Platform in Django? Apply today! Ampsight, Inc. is a small but quickly growing government services technology company located in Ashburn, Virginia, recently recognized by Inc. 5000 as one of the fastest growing companies in the United States. trinethire.com Events Python Web Conf 2023 CFP Open until Nov. 15 The 5th annual Python Web Conf will be hosted virtually from March 13-17, 2023. With sessions for mid-level and advanced developers alike, international experts will share cutting-edge presentations on topics including AI/ML, Big Data, CI/CD, Serverless, Security, Containers and more. Speakers of all backgrounds are welcome and encouraged to submit a talk. papercall.io PyCon US Online Experience Committee Volunteer Application PyCon US is introducing the Online Experience Committee to enhance the PyCon US virtual experience and boost engagement for our online attendees. If you are interested in volunteering, they are looking for people who are excited about online events. google.com DjangoCon US 2022 Official Photos Many, many photos of the event and all its participants. flickr.com Articles How Sentry uncovered an N+1 issue in djangoproject.com Using Sentry to detect N+1 issues in Python code and specifically on … -
Deploying a Django App to Fly.io
This tutorial looks at how to deploy a Django application to Fly.io. -
DjangoCon US 2022 Recap
DjangoCon US 2022DjangoCon Europe 2022 VideosAbout my proposal for the Django Core SprintsPersonal Thoughts on the Django Software Foundation Board’s Future Benchmarks for SQLite in DjangoSupport the ShowThis podcast does not have any ads or sponsors. To support the show, please consider purchasing a book, signing up for Button, or reading the Django News newsletter. -
Deploy Django + PostgreSQL on Fly.io
In this guide we will develop a Django Todo application locally and then deploy it on [Fly.io](https://fly.io) with a [Postgres production database](https://fly.io/docs/reference/postgres/). There are a number of steps needed to … -
Professionalism: You should maintain a transition file
When you change jobs, ideally you’ll have the opportunity to brief your successor directly. But that isn’t always possible: you might get fired or laid off, you might leave for another job without a clear successor named before your last day, you might have to take sudden medical leave, etc. Situations like that will be disruptive, it’s unavoidable, but a transition file will help minimize that disruption. -
A Python 3.11 "gotcha"
Recently at work I’ve been doing a bit of performance tuning on a service that’s getting ready to launch. It’s been built mostly on the tried-and-true principle of “first make it correct, then make it fast”, and really more like “then make it fast if necessary“. This is important because you generally want to have an idea of your performance goals up-front, and if you’re already hitting them then you should not spend a … Read full entry -
Django: Customizing how a model form renders fields
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