如何在django中编写此连接？

Question

看看这个django代码：

filtered = Question.objects.filter(children__marked=True).distinct()
return Question.objects.exclude(id__in=filtered)

它返回所有问题的列表，但具有已接受（标记）答案的问题除外。我试图让它回复问题，并提出赞成的答案。请参阅此SQL连接：

SELECT * from forum_node AS questions

JOIN forum_node AS answers
ON
questions.node_type = 'question' AND
answers.node_type = 'answer' AND
answers.parent_id = questions.id

WHERE
answers.score > 0 or answers.marked

现在，我如何将此连接转换为Django？

Answer 1

answered = Question.objects.filter(children__marked=True).distinct()
unanswered = Question.objects.exclude(id__in=answered) 
upvoted = Question.objects.filter(children__score__gt=0).distinct()
return unanswered | upvoted