def interlink_track(request): track_json = json.loads(request.POST.get('track_json')) print track_json['id'] print track_json['start_time'] track = Track.get_track_by_uuid(track_json['uuid']) etappen = Etappe.get_etappen_by_date(track_json['start_time']) print etappen for etappe in etappen: print etappe.start_date etappe.track.append(track) return Response(json.dumps({'link_status':'linked', 'item_uuid': track.uuid}))