node.js Mongoose 中的嵌套数组
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Nested arrays in Mongoose
提问by JuCachalot
In the collection I'm working on, a document looks like this:
在我正在处理的集合中，文档如下所示：
{
name: 'Myname',
other: 'other',
stuff: [
['something', 12, 4, 'somethingelse'],
['morestuff', 2, 4, 8],
['finally', 12, 'again', 58],
]
}
I wrote this Mongoose schema to access it:
我写了这个 Mongoose 模式来访问它：
var MyDocSchema = new Schema({
name: String,
other: String,
stuff: [],
});
When I query a doc, everything works well, the output shown in the console is right. But when, I try to do console.log(myDoc.stuff), I got the following:
当我查询文档时，一切正常，控制台中显示的输出是正确的。但是，当我尝试执行 console.log(myDoc.stuff) 时，我得到以下信息：
['something', 12, 4, 'somethingelse', 'morestuff', 2, 4, 8, 'finally', 12, 'again', 58]
instead of
代替
[
['something', 12, 4, 'somethingelse'],
['morestuff', 2, 4, 8],
['finally', 12, 'again', 58],
]
What am I doing wrong? Thank you for your help!!
我究竟做错了什么？感谢您的帮助！！
回答by Hugo
Disclaimer: This response is pretty dated, 2012! It might not be the most accurate.
免责声明：此回复非常过时，2012 年！它可能不是最准确的。
From the Mongoose documentation.
来自猫鼬文档。
http://mongoosejs.com/docs/schematypes.html: Scroll down to the Array section:
http://mongoosejs.com/docs/schematypes.html：向下滚动到 Array 部分：
Note: specifying an empty array is equivalent to
[Mixed]. The following all create arrays ofMixed.
注意：指定一个空数组等效于
[Mixed]. 以下都创建了Mixed.
Details on what that means is in the Mixed section right above the Array section.
有关这意味着什么的详细信息，请参见 Array 部分正上方的 Mixed 部分。
Here's what you need to do.
这是您需要做的。
Define a schema for the embedded documents:
为嵌入的文档定义架构：
var Stuff = new Schema({
name: String,
value1: Number,
...
});
Use that instead of an empty array []:
使用它而不是空数组[]：
var MyDocSchema = new Schema({
name: String,
other: String,
stuff: [Stuff],
});
