django-taggit a simpler approach to tagging with Django. Add "taggit" to your INSTALLED_APPS then just add a TaggableManager to your model and go::

from django.db import models

from taggit.managers import TaggableManager

class Food(models.Model):
    # ... fields here

    tags = TaggableManager()

Then you can use the API like so::

>>> apple = Food.objects.create(name="apple")
>>> apple.tags.add("red", "green", "delicious")
>>> apple.tags.all()
[<Tag: red>, <Tag: green>, <Tag: delicious>]
>>> apple.tags.remove("green")
>>> apple.tags.all()
[<Tag: red>, <Tag: delicious>]
>>> Food.objects.filter(tags__name__in=["red"])
[<Food: apple>, <Food: cherry>]

Tags will show up for you automatically in forms and the admin.

If you want to enforce lowercase tags everywhere (recommended, to avoid ending up with tags 'Music' and 'music' which are functionally identical but show up in different taxonomies), add to settings.py:

TAGGIT_FORCE_LOWERCASE = True

If you want to prevent certain words from being added as tags (such as English articles to, from, the, of, etc.) add to settings.py:

TAGGIT_STOPWORDS = [u'a', u'an', u'and', u'be', u'from', u'of']

django-taggit requires Django 1.1 or greater.

For more info checkout out the documentation. And for questions about usage or development you can contact the mailinglist <http://groups.google.com/group/django-taggit>_.