Django Session's Lifetime In Development Server

I am messing around with Session in my webapp at the moment and I noticed that whenever I restart the development server (the built-in server that came with Django), the session do

Solution 1:

change run server file

DJANGO_SETTINGS_MODULE="myproj.settings" \
  python -c 'from django.contrib.sessions.models import Session; \
    Session.objects.all().delete()' 
python manage.py runserver

see here Django snippets: clear session table -> http://djangosnippets.org/snippets/48/

Solution 2:

Another solution is to use a non-persistent session backend. For example,

SESSION_ENGINE = 'django.contrib.sessions.backends.cache'

assumes: Django 1.0-1.5, using the default cache backend (LocMem)

Using the signed_cookies backend and clearing your browser's cookies could work too, but I haven't tried it.

Why?

Django uses the database as the session backend, by default

SESSION_ENGINE

Default: django.contrib.sessions.backends.db

As a result, old sessions are restored from the database when the development server is reloaded. This holds true for the file and cached_db backends too.