alican

class DjangoModel(models.Model):

    @classmethod
    def from_db(cls, db, field_names, values):
        instance = super().from_db(db, field_names, values)
        instance._state.adding = False
        instance._state.db = db
        instance._old_values = dict(zip(field_names, values))
        return instance
        

webjunkie

# the mixin

class JSONFieldFormMixin(object):
    """
    Given that a model has some kind of TextField ``json_storage_field`` with
    a string of JSON formatted data inside, this mixin adds handling of this
    field to a ModelForm.

    It will read the text field, convert to Python dict, fill the form fields
    that are given via ``json_fields`` and on saving will write this back to

taniarascia

<section class="navigation">
  <div class="nav-container">
    <div class="brand">
      <a href="#!">Logo</a>
    </div>
    <nav>
      <div class="nav-mobile">
        <a id="nav-toggle" href="#!"><span></span></a>
      </div>
      <ul class="nav-list">

edelvalle

from django.db import transaction
from django.apps import apps
from django.contrib.contenttypes.fields import GenericForeignKey
from django.db.models.fields.related import ManyToManyField


@transaction.atomic()
def merge(primary_object, *alias_objects):
    """Merge several model instances into one, the `primary_object`.
    Use this function to merge model objects and migrate all of the related

pindia

# Read more at http://www.pindi.us/blog/migrating-cross-domain-cookies-django

from django.conf import settings
from importlib import import_module

class UpdateSessionCookieMiddleware(object):
    """
        Migrates session data from an old (hardcoded) session cookie name and domain to the name and
        domain currently defined in the Django settings.
        

sebsto

sudo wget http://repos.fedorapeople.org/repos/dchen/apache-maven/epel-apache-maven.repo -O /etc/yum.repos.d/epel-apache-maven.repo
sudo sed -i s/\$releasever/6/g /etc/yum.repos.d/epel-apache-maven.repo
sudo yum install -y apache-maven
mvn --version

phybros

#!/bin/bash

# (optional) You might need to set your PATH variable at the top here
# depending on how you run this script
#PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

# Hosted Zone ID e.g. BJBK35SKMM9OE
ZONEID="enter zone id here"

# The CNAME you want to update e.g. hello.example.com

bradmontgomery

def not_in_student_group(user):
    """Use with a ``user_passes_test`` decorator to restrict access to 
    authenticated users who are not in the "Student" group."""
    return user.is_authenticated() and not user.groups.filter(name='Student').exists()


# Use the above with:
@user_passes_test(not_in_student_group, login_url='/elsewhere/')
def some_view(request):
    # ...

perrygeo

apt-get install python-pygraphviz
pip install django-extensions
# add 'django_extensions' to INSTALLED_APPS in settings.py
python manage.py graph_models trees -o test.png

Nitron

[...]

# Fake DNS entries for testing the subdomain middleware
127.0.0.1	test1.django.local
127.0.0.1	test2.django.local
127.0.0.1	djangotest.christopher-williams.net
127.0.0.1	django.local