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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
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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.

  • django
  • rest
  • rest-api
  • django-rest-framework
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Reset Postgres Sequences On Every Migrate

If you create alot of data via fixtures or by inserting the pk you will more than likely see alot of issues with the sequences being out in postgres when creating new records. Similar to: Foo with the pk(x) already exists This you have to fix by updating the postgres sequences to start at the correct number. The below will ensure after every migrate all sequences in predefined apps get reset.

  • postgres
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Generic CBV Permissions Helper

A permission helper that can be included in any generic CBV, it uses the model attribute of the class to load all the permissions and tests a user can perform that action before dispatching the view.

  • permissions
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CBV decorator from view function decorator

The Mixin approach for applying permissions to CBV views suffers from 3 issues: 1. you need to read the code to see what permissions are being applied to a View 2. multiple bits of disparate code required to specify, e.g., a simple permission check 3. permissions set on a base class are overridden by permission set on sub-class, unless special care is taken Here's a nice trick, using only built-in django machinery, apply a decorator intended to decorate a django view function to a CBV view. https://docs.djangoproject.com/en/1.11/topics/class-based-views/intro/#decorating-the-class This approach works for any function decorators with arguments - simply wrap it in a function that takes the same arguments: def my_cbv_decorator(*args **kwargs): return method_decorator(a_view_function_decorator(*args, **kwargs), name='dispatch') Use your new CBV decorator to decorate View sub-classes: @my_cbv_decorator('some_parameter') class MyCBView(django.views.generic.TemplateView): pass # dispatch method for this view is now wrapped by a_view_function_decorator Note: you can also pass decorator parameter directly to method_decorator, but wrapping it up like this makes the code read nicer.

  • view
  • decorator
  • permissions
  • cbv
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Convert tab indented string to dictionary

output: ``` {u'Ogrenci': [u'Tum okullar', u'Lisans', u'Onlisans', u'Yuksek Lisans / Doktora', u'Ingilizce Hazirlik'], u'Ogretim Elemani': [u'Tum okullar', u'Lisans', u'Onlisans', u'Yuksek Lisans / Doktora', u'Ingilizce Hazirlik']} ```

  • python
  • tab
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