问题描述
我正在使用google和engine和objectify，因为在过去的3个小时中，我一直在尝试在objectify中编写一个不同的查询.谁能告诉我如何在特定列的objectify中编写一个不同的查询?
I am working google and engine and objectify, since for the last 3 hours i have been trying to write a distinct query in objectify. Can anyone tell me how to write a distinct query in objectify on a particular column?
关于，Sreekanth
Regards,Sreekanth
推荐答案
Distinct仅适用于投影查询，而Objectify尚不直接支持投影查询.他们在路线图上.请对此问题加注星标: https://code.google.com/p/objectify-appengine/issues/detail?id = 188
Distinct only works with projection queries, which are not directly supported by Objectify yet. They are on the roadmap. Please star this issue: https://code.google.com/p/objectify-appengine/issues/detail?id=188
同时，您可以发出低级API查询，并使用objectify的load().fromEntity()将结果集转换为POJO.
In the mean time, you can issue a low-level API query and use objectify's load().fromEntity() to convert the result set to POJOs.
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