Lessons about Django (page 4)

The links, tools and tips our engineers and designers share with each other, one “today I learned” at a time.

lessons shared: 288
people sharing: 29
database started in: 2016

stackoverflow.com
Django: How can I see a list of urlpatterns?
Flavio JuvenalJuly 14, 2021
Today I learned
As of django , test the callback functions passed to () with ()
As of django, test the callback functions passed to () with ()
Mariane PastorJuly 12, 2021
docs.djangoproject.com
Test the callback functions passed to transaction on_commit with captureOnCommitCallbacks
Mariane PastorJuly 12, 2021
b-list.org
Against service layers in Django:
*This post now has [a followup](/weblog/2020/mar/23/still-no-service/).* Recently I've seen posts and questions pop up in a few places about [a …
Rebeca SaraiJune 30, 2021
forum.djangoproject.com
Structuring large/complex Django projects, and using a services layer in Django projects:
Hi all, This is a long post so I’ve copied my two questions for a TL;DR. I’ve also bolded the questions within my post so you can grasp for any context if you think that it’d help your answers. is there any publicly available (paid is ok) literature or training available that covers how to best structure a large, ongoing, mature Django project? Does anyone have any experience writing complex Django applications with a services layer as discussed in the linked style guide? How has it gone ...
Rebeca SaraiJune 30, 2021
forum.djangoproject.com
Where to put business logic in Django? Discussion:
I’m curious if there’s any consensus here. Obvious answers are: Models/Managers - make them FAT is often cited as the default but can have performance issues and in large projects become unwieldy to reason about Views - obvious place to put them but can also grow too large and not performant, plus do you really want all the calculations done on the fly? Templates - not advised to put much logic in here, bad for performance, hard to reason about Separate Python file…this is what I see larger si...
Flavio JuvenalJune 30, 2021
stackoverflow.com
How to specify a custom 404 view for Django using Class Based Views?
Flavio JuvenalJune 23, 2021
stackoverflow.com
Render HTML from a string to browser straight from Python (useful for debugging broken template/view tests!)
Flavio JuvenalJune 23, 2021
docs.djangoproject.com
Django settings should be uppercase, otherwise it won't work
João LinsJune 14, 2021
Today I learned
How to get quantity of tasks in Celery and Redis from the default queue.
import redis from django.conf import settings queue_name = "celery" client = redis.Redis.from_url(settings.REDIS_URL) length = client.llen(queue_name)
João LinsJune 14, 2021
github.com
django-add-default-value: This django Migration Operation can be used to transfer a Fields default value to the database scheme.
Flavio JuvenalJune 3, 2021
dev.to
Image Uploads in Wagtail Forms:
For developers using the Wagtail CMS who want to add image upload fields. Heads up - This is an...
Flavio JuvenalJune 2, 2021
github.com
Django extension to allow working with 'clusters' of models as a single unit, independently of the database:
Django extension to allow working with 'clusters' of models as a single unit, independently of the database - wagtail/django-modelcluster
Flavio JuvenalMay 31, 2021
github.com
Django - Deprecate Field:
This package allows deprecating model fields and allows removing them in a backwards compatible manner. - 3YOURMIND/django-deprecate-fields
Rebeca SaraiMay 28, 2021
hacksoft.io
Django filter - filter(A).filter(B) vs filter(A, B)
Filipe XimenesMay 20, 2021

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Lessons about Django (page 4)

Django: How can I see a list of urlpatterns?

Django: How can I see a list of urlpatterns?

As of django , test the callback functions passed to () with `()`

As of django , test the callback functions passed to () with `()`

Test the callback functions passed to transaction on_commit with `captureOnCommitCallbacks`

Test the callback functions passed to transaction on_commit with `captureOnCommitCallbacks`

Against service layers in Django:

Against service layers in Django:

Structuring large/complex Django projects, and using a services layer in Django projects:

Structuring large/complex Django projects, and using a services layer in Django projects:

Where to put business logic in Django? Discussion:

Where to put business logic in Django? Discussion:

How to specify a custom 404 view for Django using Class Based Views?

How to specify a custom 404 view for Django using Class Based Views?

Render HTML from a string to browser straight from Python (useful for debugging broken template/view tests!)

Render HTML from a string to browser straight from Python (useful for debugging broken template/view tests!)

Django settings should be uppercase, otherwise it won't work

Django settings should be uppercase, otherwise it won't work

How to get quantity of tasks in Celery and Redis from the default queue.

How to get quantity of tasks in Celery and Redis from the default queue.

django-add-default-value: This django Migration Operation can be used to transfer a Fields default value to the database scheme.

django-add-default-value: This django Migration Operation can be used to transfer a Fields default value to the database scheme.

Image Uploads in Wagtail Forms:

Image Uploads in Wagtail Forms:

Django extension to allow working with 'clusters' of models as a single unit, independently of the database:

Django extension to allow working with 'clusters' of models as a single unit, independently of the database:

Django - Deprecate Field:

Django - Deprecate Field:

Django filter - filter(A).filter(B) vs filter(A, B)

Django filter - filter(A).filter(B) vs filter(A, B)

Found it useful?
Let’s put it to work.

Lessons about Django (page 4)

Django: How can I see a list of urlpatterns?

As of django , test the callback functions passed to () with ()

Test the callback functions passed to transaction on_commit with captureOnCommitCallbacks

Against service layers in Django:

Structuring large/complex Django projects, and using a services layer in Django projects:

Where to put business logic in Django? Discussion:

How to specify a custom 404 view for Django using Class Based Views?

Render HTML from a string to browser straight from Python (useful for debugging broken template/view tests!)

Django settings should be uppercase, otherwise it won't work

How to get quantity of tasks in Celery and Redis from the default queue.

django-add-default-value: This django Migration Operation can be used to transfer a Fields default value to the database scheme.

Image Uploads in Wagtail Forms:

Django extension to allow working with 'clusters' of models as a single unit, independently of the database:

Django - Deprecate Field:

Django filter - filter(A).filter(B) vs filter(A, B)

Found it useful? Let’s put it to work.

As of django , test the callback functions passed to () with `()`

Test the callback functions passed to transaction on_commit with `captureOnCommitCallbacks`

Found it useful?
Let’s put it to work.