Django 1.2 with Jinja2 and template from Database

Sometimes you need to store your templates or content block in Database.
Jinja provides a function "render_"from_string, to use this we need to write a minimal Loader and hook this up to django.

django_jinja2.py

import jinja2

from django.template.loader import BaseLoader
from django.template import TemplateDoesNotExist

from yourproject.yourapp.models import DBTemplate

class JinjaDBLoader(BaseLoader):
  is_usable = True  
 
  env = jinja2.Environment(
      loader=jinja2.FileSystemLoader(settings.JINJA2_TEMPLATE_DIRS),
      extensions=(
          'jinja2.ext.i18n',
      ),
  )

  env.template_class = Template

  def load_template(self, template_name, template_dirs=None):
      # getting template/content from Database and cached it
      object_manager = DBTemplate.objects.filter(name = template_name)
  
      if object_manager.count() > 0:
          # accessing cached object
          return self.env.from_string( object_manager[0] ), None          
      else:
          # if TemplateDoesNotExist is raised 
          # django go to the next Loader in TEMPLATE_LOADERS List
          raise TemplateDoesNotExist( template_name )

Hook the Loader into settings.TEMPLATE_LOADERS link.
And use he default django render_to_response shortcut link