如何在MongoDB中创建嵌套索引？ [英] How to Create a nested index in MongoDB?

问题描述

一个。如何索引嵌套及其所有值？

A. How do I index "nested" and all of it's values?

B.我如何索引valuetwo？

B. How do I index valuetwo?

{
    id: 00000,
    attrs: {
        nested:{
            value: value1,
            valuetwo: value2,
        }
    }
}

我看过这里： http：// www.mongodb.org/display/DOCS/Indexes ，以及据我所知的文档，不清楚索引未嵌套的东西。

I've looked here: http://www.mongodb.org/display/DOCS/Indexes, and the docs to my knowledge, aren't clear about indexing things that aren't nested.

推荐答案

您创建它们就像在顶级字段上创建索引一样：

You'd create them just as if you were creating an index on a top level field:

db.collection.ensureIndex({"attrs.nested.value": 1})

您需要在每个字段上显式创建索引。

You do need to explicitly create indexes on each field.

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