simonw

from django.db.models import F, Func, Value
from myapp.models import MyModel

# Annotation
MyModel.objects.filter(description__icontains='\r\n').annotate(
    fixed_description=Func(
        F('description'),
        Value('\r\n'), Value('\n'),
        function='replace',
    )

dhbradshaw

To change a field name in django 1.7+

1.  Edit the field name in the model (but remember the old field name: you need it for step 3!)
2.  Create an empty migration
$ python manage.py makemigrations --empty myApp
3.  Edit the empty migration (it's in the migrations folder in your app folder, and will be the most recent migration) by adding

migrations.RenameField('MyModel', 'old_field_name', 'new_field_name'),

to the operations list.

cyberdelia

# -*- coding: utf-8 -*-
from django.contrib.auth.decorators import login_required
from django.utils.cache import patch_response_headers
from django.utils.decorators import method_decorator
from django.views.decorators.cache import cache_page, never_cache
from django.views.decorators.csrf import csrf_exempt


class NeverCacheMixin(object):
    @method_decorator(never_cache)