+ @property
+ def is_youtube_publishable(self):
+ return (
+ not self.youtube_volume
+ or not type(self)
+ .objects.filter(youtube_volume=self.youtube_volume, index__lt=self.index)
+ .exists()
+ )
+
+ def youtube_publish(self):
+ if not self.is_youtube_publishable:
+ return False
+ self.youtube_status = status.QUEUED
+ self.youtube_queued = now()
+ self.save(update_fields=['youtube_status', 'youtube_queued'])
+