pip install django-service-templates

from dbtemplates import Template
from django_service_templates.models import ServiceTemplate

class HeatTemplate(ServiceTemplate):

    # your awesome stuff

    pass

dbtemplate = Template.objects.create(name='My Jinja2 Template', content='{{ name }}')

HeatTemplate.objects.create(template=dbtemplate, context={'name': 'My name'}).render()

> 'My name'