Lessons about Django (page 14)

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

github.com
Easily link related fields on both Django Admin list and change view:
An easy way to add links to relations in the Django Admin site. - gitaarik/django-admin-relation-links
Carlos CoelhoDecember 29, 2017
github.com
heroku's addons for memcached are not explicitly compatible with Celery as result backends, but you can use them with django-celery-results
We created a custom cache for Celery and used [Memcached Cloud]( Our settings for this are looking like: ``` INSTALLED_APPS = [ # ... 'django_celery_results', # ... ] CACHES['celery'] = { 'BACKEND': 'django_bmemcached.memcached.BMemcached', 'LOCATION': MEMCACHED_SERVERS, 'OPTIONS': { 'username': MEMCACHED_USERNAME, 'password': MEMCACHED_PASSWORD, } } CELERY_RESULT_BACKEND = 'django-cache' CELERY_CACHE_BACKEND = 'celery' ``` Obs.: To use Memcached Cloud on Django you have to follow these instructions
Hugo BessaDecember 28, 2017
medium.com
This blog post explains two approaches for dealing with concurrent access in Django models, a pessimistic and an optimistic one
Filipe XimenesDecember 27, 2017
github.com
Django test utils to manage file storage side effects:
Flávio JuvenalDecember 5, 2017
stackoverflow.com
Solution for slow Django tests with custom localhost domain: #comment81243303_28864152
Flávio JuvenalDecember 3, 2017
caktusgroup.com
If you need to use more advanced database functions on Django annotations, such as Postgres split_part, you can make use of query expressions like Func
Carlos CoelhoNovember 27, 2017
stackoverflow.com
On DRF, override to use different serializers for input and output in a same request:
Flávio JuvenalNovember 17, 2017
Today I learned
If using get_or_create don't forget to make use of defaults parameter
Carlos CoelhoNovember 16, 2017
github.com
Use django-postgres-extra for native upserts, more powerful HStoreField, more signals and indexes with conditions:
Bringing all of PostgreSQL's awesomeness to Django. - SectorLabs/django-postgres-extra
Flávio JuvenalNovember 16, 2017
Today I learned
Django will store your dates in UTC if you set USE_TZ=True
Anderson ResendeNovember 11, 2017
github.com
If you need to create a fixture based on a single record from the database, you can use django-fixture-magic
Utilities to extract and manipulate Django Fixtures. - davedash/django-fixture-magic
Carlos CoelhoNovember 9, 2017
docs.python.org
You can use itertools.chain to group different querysets: #itertools.chain
Anderson ResendeNovember 6, 2017
github.com
Postgres SQL Views in Django:
Fork of django-postgres that focuses on maintaining and improving support for Postgres SQL Views. - mypebble/django-pgviews
Flávio JuvenalNovember 2, 2017
charlesleifer.com
How to create symmetrical relationships in Django using ManyToMany's "through"
Luca BezerraOctober 25, 2017
simonwillison.net
Implementing faceted search with Django and PostgreSQL:
I’ve added a faceted search engine to this blog, powered by PostgreSQL. It supports regular text search (proper search, not just SQL“like” queries), filter by tag, filter by date, filter …
Flávio JuvenalOctober 23, 2017

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Lessons about Django (page 14)

Easily link related fields on both Django Admin list and change view:

Easily link related fields on both Django Admin list and change view:

heroku's addons for memcached are not explicitly compatible with Celery as result backends, but you can use them with django-celery-results

heroku's addons for memcached are not explicitly compatible with Celery as result backends, but you can use them with django-celery-results

This blog post explains two approaches for dealing with concurrent access in Django models, a pessimistic and an optimistic one

This blog post explains two approaches for dealing with concurrent access in Django models, a pessimistic and an optimistic one

Django test utils to manage file storage side effects:

Django test utils to manage file storage side effects:

Solution for slow Django tests with custom localhost domain: #comment81243303_28864152

Solution for slow Django tests with custom localhost domain: #comment81243303_28864152

If you need to use more advanced database functions on Django annotations, such as Postgres `split_part`, you can make use of query expressions like `Func`

If you need to use more advanced database functions on Django annotations, such as Postgres `split_part`, you can make use of query expressions like `Func`

On DRF, override to use different serializers for input and output in a same request:

On DRF, override to use different serializers for input and output in a same request:

If using `get_or_create` don't forget to make use of `defaults` parameter

If using `get_or_create` don't forget to make use of `defaults` parameter

Use django-postgres-extra for native upserts, more powerful HStoreField, more signals and indexes with conditions:

Use django-postgres-extra for native upserts, more powerful HStoreField, more signals and indexes with conditions:

Django will store your dates in UTC if you set USE_TZ=True

Django will store your dates in UTC if you set USE_TZ=True

If you need to create a fixture based on a single record from the database, you can use `django-fixture-magic`

If you need to create a fixture based on a single record from the database, you can use `django-fixture-magic`

You can use itertools.chain to group different querysets: #itertools.chain

You can use itertools.chain to group different querysets: #itertools.chain

Postgres SQL Views in Django:

Postgres SQL Views in Django:

How to create symmetrical relationships in Django using ManyToMany's "through"

How to create symmetrical relationships in Django using ManyToMany's "through"

Implementing faceted search with Django and PostgreSQL:

Implementing faceted search with Django and PostgreSQL:

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

Lessons about Django (page 14)

Easily link related fields on both Django Admin list and change view:

heroku's addons for memcached are not explicitly compatible with Celery as result backends, but you can use them with django-celery-results

This blog post explains two approaches for dealing with concurrent access in Django models, a pessimistic and an optimistic one

Django test utils to manage file storage side effects:

Solution for slow Django tests with custom localhost domain: #comment81243303_28864152

If you need to use more advanced database functions on Django annotations, such as Postgres split_part, you can make use of query expressions like Func

On DRF, override to use different serializers for input and output in a same request:

If using get_or_create don't forget to make use of defaults parameter

Use django-postgres-extra for native upserts, more powerful HStoreField, more signals and indexes with conditions:

Django will store your dates in UTC if you set USE_TZ=True

If you need to create a fixture based on a single record from the database, you can use django-fixture-magic

You can use itertools.chain to group different querysets: #itertools.chain

Postgres SQL Views in Django:

How to create symmetrical relationships in Django using ManyToMany's "through"

Implementing faceted search with Django and PostgreSQL:

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

If you need to use more advanced database functions on Django annotations, such as Postgres `split_part`, you can make use of query expressions like `Func`

If using `get_or_create` don't forget to make use of `defaults` parameter

If you need to create a fixture based on a single record from the database, you can use `django-fixture-magic`

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