[Answered ]-Django "evaluate" filter?

I’m not sure if I understand your question correctly, but the following might work.

Treat flatpage.content as a template, and render it in the view with any context you wish.

# view
from django.template import Template, Context

def user_agreement(request):
    flatpage = FlatPage.objects.get(key='user-agreement')
    t = Template(flatpage.content)
    fp_content = t.render(Context({}))
    return response(request, template='misc/flatpage.html',
        vars={'title': flatpage.title, 'content': fp_content}) 

Then apply the markdown filter in the misc/flatpage.html template.

<h2>{% block title %}{{ title }}{% endblock %}</h2>

{{ content|markdown }}