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All snippets written in Python

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LazyPrimaryKeyRelatedField

When you change dynamicaly the objects manager on your Model class, you may want to have serializers take it into account.

  • DRF
  • PrimaryKeyRelatedField
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CacheInDictManager

This manager use a local (in python dicts) cache for efficiency. It caches get requests and is better used with a context manager. I based my work on this previous snippet : https://djangosnippets.org/snippets/815/

  • caching
  • Django Manager
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Django Standard API Response Middleware for DRF for modern frontend easy usage

I'm typescript frontend developer and i was interested in standartizing API server responses. I've tried Django for one of my projects. I've build my API and splited it into Django apps aiming at possible migration to [link >] [Microservices](https://www.youtube.com/watch?v=0iB5IPoTDts) [<] later. The problem I've faced is a difficulty of standartization API responses not only in multiple views, but for all composition of JSON-oriented django-apps which can only be made with middleware. I have put all the links to everybody could familiarize with Django framework conceptions used here. Also, I suggest to familiarize with [link >] [origin solution] (https://djangosnippets.org/snippets/10717/) [<]. The main difference is that in all my DRF JSONRenderers I do not need to wrap fields in 'result' or 'results' nested JSON. I do not get messed with result and results. If I expect an array, I just check additional pagination fields. I did not used a pagination section in my project, still i've left opportunities for that according to [link >] [origin solution] (https://djangosnippets.org/snippets/10717/) [<. Ypu can also find a paginator code fro DRF there.

  • Django
  • DRF
  • Standartization
  • Middlewares
  • Microservices
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EnhancedQuerySet

A proxy for Django queryset attempting to avoid boilerplate code with ifs and avoid bugs when affectation of result is not done.

  • django query set
  • IGNORE_FILTER
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Work around for negation of Q filter

It may save you some time if you're in the case of this link : https://stackoverflow.com/questions/11801363/django-q-with-joins-functioning-incorrectly-bug It worked for me at least.

  • negation
  • Q filter
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Load template from specific app

This is an updated of version snippets: * [https://djangosnippets.org/snippets/10489/](https://djangosnippets.org/snippets/10489/) * [https://djangosnippets.org/snippets/1376/](https://djangosnippets.org/snippets/10489/) Tested to with with Django 3.2 With this template loader you can extend templates from built-in Django apps such as Django admin. Example: {% extends "admin:admin/index.html" %} {% block sidebar %} {{block.super}} <div> < h1>Statistics< /h1> < a href="/admin/station/stats/">Published Stations< /a> </div> {% endblock %} Configuration: TEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [ 'your_app/templates' ], 'OPTIONS': { # (...) # See: https://docs.djangoproject.com/en/3.2/ref/templates/api/#django.template.loaders.cached.Loader 'loaders': [ ('django.template.loaders.cached.Loader', [ 'django.template.loaders.filesystem.Loader', 'django.template.loaders.app_directories.Loader', 'your_app.template_loaders.SpecificAppTemplateLoader', ]), ], }, }, ]

  • template-loader
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ReadOnlySelect

A minimally invasive Select widget that looks and acts like a disabled select input, but still submits with the form. It works by rendering the form as disabled, and supplements it's output with a hidden input field with the same name and value. Tested in Django 3.0, probably works in Django 1.11+

  • forms
  • select
  • readonly
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Verify events sent to your webhook endpoints

Third party services (e.g. Stripe) optionally sign webhook events to verify it is them sending events. If the third party you use does not provide an SDK or official library for verifying signatures, you can manually verify the signature with this snippet.

  • signature
  • third-party
  • webhook
  • hmac
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