bson的javascript/javascriptwithscope类型有什么用 [英] What is the use of type javascript/javascriptwithscope of bson

问题描述

我想知道这两种类型的bson(javascript/javascriptwithscope)的用法； 作为bson的基本类型.

I am wondering about the use of these two type of bson (javascript/javascriptwithscope); as the base type of bson.

它的用例是什么，以及如何生成javascriptwithscope对象以保存在mongodb中?

What's the use case of it and how to generate a javascriptwithscope object to save in mongodb?

类型编号别名注释

Double  1   "double"     
String  2   "string"     
Object  3   "object"     
Array   4   "array"  
Binary data 5   "binData"    
Undefined   6   "undefined" Deprecated.
ObjectId    7   "objectId"   
Boolean 8   "bool"   
Date    9   "date"   
Null    10  "null"   
Regular Expression  11  "regex"  
DBPointer   12  "dbPointer"  
JavaScript  13  "javascript"     
Symbol  14  "symbol"     
JavaScript (with scope) 15  "javascriptWithScope"    
32-bit integer  16  "int"    
Timestamp   17  "timestamp"  
64-bit integer  18  "long"   
Min key -1  "minKey"     
Max key 127 "maxKey"     

推荐答案

基本上，我们不需要执行任何操作:-)数据类型，因为mongo引擎会将正确的类型应用于插入的数据.

Basically we need to do nothing :-) with data type as mongo engine will apply correct type to inserted data.

在创建将插入到mongo中的javascript对象时:

When creating a javascript object which will be inserted to mongo:

var object = {
    thisWillBeNumber : 1,
    thisWillBeString :"aaa",
    thisWillBeAnArray = [1,2,3]
    thisWillBeDateTime: new Date()  
}

然后mongo使用javascript对象类型并将其保存. 在某些驱动程序/框架中，我们可以在应用程序级别上强制使用字段/变量的类型，并且可以将此类信息添加到存储的文档中.

then mongo uses javascript object type and savs it. In some drivers/framework we can enforce on application level types of our field/variables and such information could be added to stored document.

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