Django 根据测试分数和时间对用户进行排名

我有以下模型：（简化）

我想得到一个关于某个测试的

TestResult

列表，过滤掉那些分数为0的，取每个用户得到的最好结果，并将所有结果从最好到最差排序。最佳被定义为得分最高，如果得分相同，则时间最少

我还没能找到一个在一个查询中使用模型和查询集的合理解决方案

目前，在没有任何其他解决方案的情况下尝试了几天之后，我正在使用此原始SQL（简化）：

SELECT res.id, res.user_id, res.test_id, res.score, res.time, res.more_fields...
FROM (
    SELECT user_id, MAX(score) AS score
    FROM app_testresult
    WHERE test_id = %s AND score > 0
    GROUP BY user_id
) AS highscore INNER JOIN (
    SELECT user_id, score, MIN(time) as time
    FROM app_testresult
    WHERE test_id = %s
    GROUP BY user_id, score
) AS fastest
        ON (highscore.user_id = fastest.user_id AND highscore.score = fastest.score)
    INNER JOIN app_testresult as res
        ON (res.user_id = fastest.user_id AND res.time = fastest.time)
GROUP BY fastest.user_id
ORDER BY res.score DESC, res.time ASC

想到这个SQL，我就畏缩，但我找不到任何其他解决方案

我的配置：

• Django版本：1.6.7
• 数据库：MySQL 5.5

SELECT res.id, res.user_id, res.test_id, res.score, res.time, res.more_fields...
FROM (
    SELECT user_id, MAX(score) AS score
    FROM app_testresult
    WHERE test_id = %s AND score > 0
    GROUP BY user_id
) AS highscore INNER JOIN (
    SELECT user_id, score, MIN(time) as time
    FROM app_testresult
    WHERE test_id = %s
    GROUP BY user_id, score
) AS fastest
        ON (highscore.user_id = fastest.user_id AND highscore.score = fastest.score)
    INNER JOIN app_testresult as res
        ON (res.user_id = fastest.user_id AND res.time = fastest.time)
GROUP BY fastest.user_id
ORDER BY res.score DESC, res.time ASC