satisfaction.py

from django import template
from django.template.base import TemplateSyntaxError
from django.template.loader import render_to_string

register = template.Library()

class SatisfactionNode(template.Node):
    def __init__(self, from_object, option):
        self.from_object = template.Variable(from_object)
        self.option = template.Variable(option)

    def render(self, context):
        #return the html needed by the satisfaction dialogs  
        #TODO: templateize
        obj = self.from_object.resolve(context)
        rendered = render_to_string('form.html', self.option)
        return rendered
        
@register.tag
def satisfaction(parser, token):
    tokens = token.split_contents()
    if len(tokens) is 3:
        _, from_object, option = tokens
        return SatisfactionNode(from_object, option)  
    message = "Too %s parameters for tag satisfaction. Expected 3." % ("many" if len(tokens) > 3 else "few")
    raise TemplateSyntaxError(message)