Simple Django Template Tag that render another template tag added in a text field

render.py

# -*- coding: utf-8 -*-
from django import template
from django.template.context import Context
from django.template.defaultfilters import stringfilter
from django.template.loader import get_template_from_string



register = template.Library()
@register.filter
@stringfilter
def render_chart(value):
    """ 
    You can use this
    {{message.body|render}}
    """
    return get_template_from_string(value).render(Context())