使用objectify进行区分 [英] Distinct using objectify

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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