In some cases it can be useful to enable Django tags within your Jinja2 templates, for example… when you are converting your templates but still have some legacy tags/filters that don’t support Jinja2 or if you are using a project without Jinja2 support.

Luckily, that’s not too difficult to achieve with Jinja2, actually a lot easier than the reverse as discussed in http://w.wol.ph/2013/07/28/mixing-django-with-jinja2-without-losing-template-debugging/

It should be noted that the Coffin library is used in this example but these imports could easily be replaced with straight up Jinja2.

The actual code:

[python]
from django import template as django_template
from jinja2 import nodes, contextfunction, ext
from coffin.template import Library, Template

# Create a Library to register the tags
register = Library()

# The actual Django templatag for Jinja
class Django(ext.Extension):
tags = set([‘django’])

def preprocess(self, source, name, filename=None):
source = source.replace(‘{% django %}’, ‘{% django %}{% raw %}’)
source = source.replace(‘{% enddjango %}’,
‘{% endraw %}{% enddjango %}’)
return source

def parse(self, parser):
lineno = parser.stream.next().lineno

while not parser.stream.next().test(‘block_end’):
pass

body = nodes.Const(parser.stream.next().value)

while not parser.stream.current.test(‘block_end’):
parser.stream.next()

return nodes.Output([
self.call_method(‘_django’, args=[body], kwargs=[]),
]).set_lineno(lineno=lineno)

@contextfunction
def _django(self, context, html):
return django(context, html)

# Registering the tag
register.tag(Django)

# Alternatively, we can also call `django()` as a function.
# Our templatetag silently converts the Django tag to this function call
@contextfunction
@register.object
def django(context, html):
context = django_template.RequestContext(context[‘request’], context)
return django_template.Template(html).render(context)
[/python]

Now the tag can be used like this:

[htmldjango]

{% if foo == bar %}
Jinja style if…
{% endif %}

{% django %}
{% ifequal foo bar %}
Django style if…
{% endif %}
{% enddjango %}
[/htmldjango]