SimionBaws.ro

Sometimes, you will need to get the current authenticated user in models, or other parts of your app.

To achieve this, you must create this middleware and add it to MIDDLEWARE_CLASSES in project settings:
try:
from threading import local, current_thread
except ImportError:
from django.utils._threading_local import local

_thread_locals = local()


class GlobalUserMiddleware(object):
"""
Sets the current authenticated user in threading locals

Usage example:
from app_name.middleware import get_current_user
user = get_current_user()
"""
def process_request(self, request):
setattr(
_thread_locals,
'user_{0}'.format(current_thread().name),
request.user)

def process_response(self, request, response):

key = 'user_{0}'.format(current_thread().name)

if not hasattr(_thread_locals, key):
return response

delattr(_thread_locals, key)

return resp…

Django 1.5 does not have a utility method to delete template fragment cache, with arguments.

In order to achieve this, you must create a custom method:
from django.core.cache import cache
from django.utils.hashcompat import md5_constructor
from django.utils.http import urlquote


def invalidate_template_fragment(fragment_name, *variables):
args = md5_constructor(u':'.join([urlquote(var) for var in variables]))
cache_key = 'template.cache.{0}.{1}'.format(fragment_name, args.hexdigest())
cache.delete(cache_key)

Example usage:
{% cache 259200 key_name model_instance.pk %}
... cached content here ...
{% endcache %}

// note that "model_instance.pk" is optional argument. You can use as many as you need

... and delete the cache:
invalidate_template_fragment('key_name', model_instance.pk)


In django 1.6+ you can do this more easy:
from django.core.cache import cache
from django.core.cache.utils import make_template_fragment_key

key = make_template_fragment_key('…