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Rails 怎么求同一个表中，两个整数字段之和的排序

tingsen · January 09, 2015 · Last by appell replied at January 09, 2015 · 1843 hits

用的是 mongodb 数据库，怎么求同一个集合中，两个整数字段之和的排序。

heylonj #0 January 09, 2015

还是再加一个字段吧。

appell #1 January 09, 2015

aggregation？

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