created_at = models.DateTimeField(auto_now_add=True, editable=False, db_index=True)
seen_at = models.DateTimeField(auto_now_add=True, editable=False)
view_count = models.IntegerField(default=1)
created_at = models.DateTimeField(auto_now_add=True, editable=False, db_index=True)
seen_at = models.DateTimeField(auto_now_add=True, editable=False)
view_count = models.IntegerField(default=1)