a hard question about django ORM

[时空路由器]

there are three classes

class User(models.Model):
  name = models.CharField()

class Feed(models.Model):
  user = models.ForeignKey(User)

class Comment(models.Model):
  user = models.ForeignKey(User)
  feed = models.ForeignKey(Feed)

How to get all my feeds and all the coments of them, but the user of comment are not mine

[lemme smash]

what the problem here?
you can get all your Feeds by

feeds = Feed.objects.filter(user=me)

 and then all the comments for each feed

comments = feed.comment_set.exclude(user=me)

or what?
if you want to get only comments, you can do

comments = Comment.objects.filter(feed__in=feeds).exclude(user=me)