Mongoose子文档与嵌套模式 [英] Mongoose subdocuments vs nested schema

问题描述

我很好奇在我的主模式中使用子文档与更深层的利弊：

I'm curious as to the pros and cons of using subdocuments vs a deeper layer in my main schema:

var subDoc = new Schema({
  name: String
});

var mainDoc = new Schema({
  names: [subDoc]
});

或

var mainDoc = new Schema({
  names: [{
    name: String
 }]
});

我目前正在使用各个子网站，但我主要想知道性能或查询我可能遇到的问题。

I'm currently using subdocs everywhere but I am wondering primarily about performance or querying issues I might encounter.

推荐答案

根据文档，它完全一样。
但是，使用Schema会添加一个 _id 字段（只要你没有禁用它），并且可能会使用更多资源进行跟踪subdocs。

According to the docs, it's exactly the same. However, using a Schema would add an _id field as well (as long as you don't have that disabled), and presumably uses some more resources for tracking subdocs.

备用声明语法

v3中的新功能如果您不需要访问子文档模式实例，您也可以通过简单地传递对象文字[...]

New in v3 If you don't need access to the sub-document schema instance, you may also declare sub-docs by simply passing an object literal [...]

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