activitystreams_idea.py

# My app will start with creating a generic relationship with any object that notifies it of an update

from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes import generic

class ActivityStreamItem(models.Model):
    actor          = models.ForeignKey("... want to populate from another model's inner class ...")
    content_type   = models.ForeignKey(ContentType)
    object_id      = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')

# I'd like to make it as easy as possible to integrate with existing apps and models.
# So, ideally it would just require the developer to add an inner class to their models the same way
# django-imagekit handles spec files

from django.db import models
from django.contrib.auth.models import User

class BlogEntry(models.Model):
    title = models.CharField(max_length=80)
    body  = models.TextField()
    author = models.ForeignKey(User, related_name = 'blog_author')

    class NotifyStream(self):
        title = self.title
        actor = self.author


# So, in my app's model, how do I a.) know that an event has occurred in the hypothetical blog app, 
# and b.) access the inner class from my app's model?