getstream return enriched as json

views.py

# this throws: <stream_django.enrich.EnrichedActivity object at 0x7f8ffc86e250> is not JSON serializable
from django.http import HttpResponse, HttpResponseServerError
from stream_django.enrich import Enrich
from stream_django.feed_manager import feed_manager
import json

def enrich_feed(request):
    context = {}
    try:
        # raw feed data
        activities = json.loads(request.body)

        # convert to django objects
        enricher = Enrich(fields=['actor', 'object', 'target', 'station'])
        context['activities'] = enricher.enrich_activities(activities)

        #response = render_to_response('mystream/feed.html', context)
        return HttpResponse(json.dumps(context), content_type='application/json')

    except Exception, e:
        response = HttpResponseServerError(e)

    return response

I'm getting is not JSON serializable with that. Heres a test with a hard-coded example (although you can't run it from your side without my models.py I guess), but to illustrate:

        activities = [{u'origin': None, u'verb': u'drop', u'target': u'playlist.Playlist:46', u'object': u'video.Video:227', u'actor': u'auth.User:2', u'to': [], u'station': u'station.Station:2', u'time': u'2015-02-19T20:48:35.699', u'foreign_id': None, u'id': u'ac768036-b878-11e4-8080-80015e4ad826'}]

        enricher = Enrich(fields=['actor', 'object', 'target', 'station'])
        acts_enriched = enricher.enrich_activities(activities)
        context['acts'] = json.dumps([a.activity_data for a in acts_enriched], cls=DjangoJSONEncoder)
        return HttpResponse(context, content_type='application/json')

It seems to be choking when trying to serialize my custom models? Or more specifically, the queryset for each custom model? e.g. u'target': <Playlist: Good Picks> is probably one its unable to serialize.

>>> [a.activity_data for a in acts_enriched]
[{u'origin': None, u'to': [], u'verb': u'drop', u'target': <Playlist: Good Picks>, u'time': u'2015-02-19T20:48:35.699', u'station': <Station: Jason>, u'foreign_id': None, u'object': <Video: Nikon Df vs D4 - D4 Sensor in a Smaller Body?>, u'id': u'ac768036-b878-11e4-8080-80015e4ad826', u'actor': <User: Jason>}]

I see some info on SO about it, but I'm wondering how to incorporate the solutions. I think I need to flatten out Playlist value, for example? Is it possible to have a method in each of my models that returns a json-serializable? Or maybe I could loop through the acts_enriched and flatten/fix them before running json.dumps. Thoughts?

http://stackoverflow.com/questions/16336271/is-not-json-serializable
http://stackoverflow.com/questions/10764909/django-serialize-datetime-to-json-in-queryset-dict