Can you explain the purpose of the bson type in conjunction with the javascript/javascriptwithscope?

I am intrigued by the utilization of the two types of bson, specifically javascript and javascriptwithscope, as the foundational types of bson.

What are the use cases for these types and how can a javascriptwithscope object be created and saved in mongodb?

Type Number Alias Notes

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”
javascriptmongodbbson

Answer №1

Essentially, there is no need for us to explicitly specify data types when inserting data into MongoDB using mongo engine as it automatically handles type conversion.

For instance, when creating a JavaScript object that will be inserted into MongoDB:

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

MongoDB will utilize the JavaScript object type and store it accordingly. Some drivers or frameworks offer the ability to enforce field or variable types at the application level, and this information can be included in the stored document.

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