djangosnippets: All snippets written in Python

ChoiceField's choices from model

I have a product table but don't have a brand table. brands in product.brand as denormalized and I want to choose brands from a select tag.

django
forms
choicefield

Thu 28 Mar 2019 Read More

Tweet embed template tag

Takes a tweet url, requests the json from Twitter oEmbed, parses the json for the html element and returns it to your template. The html returned is ready to go and will be shown as a tweet on your web page. This uses the Requests library for Python. A full example can be found on GitHub https://github.com/z3ke1r/django-tweet-embed.

django
templatetag
json
embed
twitter
parse
requests
tweet

Thu 13 Jun 2019 Read More

Adding Object name in Success Message

**Success Message has object properties** Success Message can have an object name or the properties of the object model to collide with the message see code below

success_message

Tue 05 Feb 2019 Read More

Different Response Data/Serializer for DRF Views/Viewsets

Mixin for Django Rest Framework View/Viewsets to use different response data/serializers without unnecessary hacks. Just extend your DRFs view/viewset with this mixin after the DRF's APIView (sub)classes.

django
mixin
response
django-rest-framework
drf

Sun 28 Apr 2019 Read More

Hand over model instance relations to another instance of the same model

If you have a model instance you want to merge into another, it's handy to hand over all the relations into the model you want to merge into, so the deletion won't trigger cascading deletions from other tables. You can pass an `Iterable` of the same objects (a.k.a `QuerySet`) to the model, and then process it with the new model's `pk`.

foreignkey
many2many
relations
handover

Fri 12 Oct 2018 Read More

create custom permissions

django
commands

Sun 28 Apr 2019 Read More

Flask and Django

test

tag1

Mon 09 Jul 2018 Read More

Filter to shorten Natural Time

- This is a filter to shorten the natural time value obtained using naturaltime function from humanize.

filter
django
humanize

Tue 26 Jun 2018 Read More

Auth decorators with 403 - Django 1.11

This decorator is based on user_passes_test, but when a user is logged in and fails the test, it will render a 403 error instead of redirecting to login - only anonymous users will be asked to login. Version working with Django 1.11, based on version found on [https://djangosnippets.org/snippets/254/] , which is deprecated.

auth
user_passes_test
403 permission_required

Wed 23 May 2018 Read More

DRF - Optimizing ModelViewSet queries

Using Django REST Framework for Model views there is always the issue of making duplicated queries without either prefetching the objects that will be accessed using the serializer and as such will lead to large number of queries being made to the database. This will help in optimizing the queryset used for the viewset by accessing the `_meta.fields` property of the serializer.