Django json templatetag

json_extras.py

from django.template import Library
from django.core.serializers import serialize
from django.core.serializers.json import DjangoJSONEncoder
from django.utils import simplejson
from django.utils.safestring import mark_safe

register = Library()


@register.filter
def json(object, fields=None):
    if not fields:
        raw_data = serialize('python', object)
    else:
        raw_data = serialize('python', object, fields=fields.split(','))

    actual_data = [d['fields'] for d in raw_data]

    return mark_safe(simplejson.dumps(actual_data, cls=DjangoJSONEncoder))
json.is_safe = True