Django 1.2.x mit Jinja2

django_jinja2.py @ http://www.rosslawley.co.uk/2010/07/django-12-and-jinja2-integration.html

"""

Using Jinja2 with Django 1.2
Based on: http://djangosnippets.org/snippets/2063/

To use:
  * Add this template loader to settings: `TEMPLATE_LOADERS`
  * Add template dirs to settings: `JINJA2_TEMPLATE_DIRS`

If in template debug mode - we fire the template rendered signal, which allows
debugging the context with the debug toolbar.  Viewing source currently doesnt
work.

If you want {% url %} or {% csrf_token %} support I recommend grabbing them
from Coffin (http://github.com/dcramer/coffin/blob/master/coffin/template/defaulttags.py)
Note for namespaced urls you have to use quotes eg:
  {% url account:login %} => {% url "account:login" %}
"""
import jinja2

from django.template.loader import BaseLoader
from django.template import TemplateDoesNotExist, Origin
from django.core import urlresolvers
from django.conf import settings


class Template(jinja2.Template):
def render(self, context):
# flatten the Django Context into a single dictionary.
context_dict = {}
for d in context.dicts:
    context_dict.update(d)

if settings.TEMPLATE_DEBUG:
    from django.test import signals
    self.origin = Origin(self.filename)
    signals.template_rendered.send(sender=self, template=self, context=context)

return super(Template, self).render(context_dict)


class Loader(BaseLoader):
"""
    A file system loader for Jinja2.
    
    Requires the following setting `JINJA2_TEMPLATE_DIRS`
    """
is_usable = True

# Set up the jinja env and load any extensions you may have
env = jinja2.Environment(
loader=jinja2.FileSystemLoader(settings.JINJA2_TEMPLATE_DIRS),
extensions=(
    'django_jinja2.extensions.URLExtension',
    'django_jinja2.extensions.CsrfExtension',
)
)
env.template_class = Template

# These are available to all templates.
env.globals['url_for'] = urlresolvers.reverse
env.globals['MEDIA_URL'] = settings.MEDIA_URL

def load_template(self, template_name, template_dirs=None):
try:
    template = self.env.get_template(template_name)
    return template, template.filename
except jinja2.TemplateNotFound:
    raise TemplateDoesNotExist(template_name)

settings.py

JINJA2_TEMPLATE_DIRS = (

    # your template dirs
)

TEMPLATE_LOADERS = (
# Use this to hook the loader into django 
'django_jinja2.Loader',

# use this to run the admin with django-default-template-engine
'django.template.loaders.app_directories.load_template_source',
...
)


TEMPLATE_CONTEXT_PROCESSORS = [
"django.core.context_processors.auth",

# access request
"django.core.context_processors.request",

# access MEDIA_URL
"django.core.context_processors.media",
...
]

views.py

from django.shortcuts import render_to_response

def index(request):
  return render_to_response( "index.html",
      { },
      # this is important to access TEMPLATE_CONTEXT_PROCESSORS
      context_instance = RequestContext( request )
  )