def subscriberdata_for_podcast(podcast_id):
if not podcast_id:
raise QueryParameterMissing('podcast_id')
db = get_main_database()
data = get_single_result(db, 'podcasts/subscriber_data',
key = podcast_id,
include_docs = True,
schema = PodcastSubscriberData,
)
if not data:
data = PodcastSubscriberData()
data.podcast = podcast_id
return data
