Podcast frontpage notifications are inaccurate

[rhysyngsun]

We've seen some email notifications go out that include really old (10+ years) podcast episodes in them. It looks like the current logic sorts by created_on rather than last_modified (which corresponds to pubDate in the feed xml). Additionally, it is returning all podcasts, including ones that aren't published anymore.

• Update the logic to sort by last_modifed instead of created_on
• Update logic to filter to published=True

[JenniWhitman]

@rhysyngsun to make sure I understand the logic/ask on the filtering - you mention the sorting by created - should it also filter episodes = episodes.filter(last_modified__gt=notification.created_on) instead of episodes = episodes.filter(created_on__gt=notification.created_on) as well? If we want all created, despite date, I'll leave it, but it seemed like a logical change as well, but wasn't quite in line with the other two asks.

[rhysyngsun]

@JenniWhitman yes that makes sense