f.py

import datetime
from django.db import models
from django.contrib.auth.models import User
from django.db.models import Sum
from django.db.models.signals import post_init
from django import forms
from django.utils.translation import ugettext_lazy as _

from feincms.module.page.models import Page
from feincms.content.richtext.models import RichTextContent
from feincms.content.medialibrary.models import MediaFileContent

class Category(models.Model):
    """ Umbrella that helps sort Organisers, e.g. University """
    name = models.CharField(max_length=500)

    def __unicode__(self):
        return self.name

class Organiser(models.Model):
    """ The organiser that manages an event, e.g. Society """
    user = models.ForeignKey(User, unique=True)
    name = models.CharField(max_length=500)    
    category = models.ForeignKey(Category)
    top_organiser = models.BooleanField()

    def __unicode__(self):
        return self.name