Extract Decimal from Decimal128 with Mongoose - MongoDB

Question

I\'m querying Mongo in Nodejs with Mongoose and attempting to extract the numeric value of multiple fields stored as a Decimal128. However, the value is oddly wrapped in que

Answer 1

Method 1: .

use toString(). It will convert the object to string.

find((docs) => {
   let result = docs.map((doc) => {
       if(doc.open){
          doc.open = doc.open.toString();
       }

       if(doc.close){
          doc.close = doc.close.toString();
       }

       return doc;  
   });

    //send modified output
    res.json(result);
})

output as follows:-

/*
[
  {
    "open":  "86.13",
    "close": "85.64"
  },
]
*/

Method 2: Mongodb 4.0 above,

db.myCollection.aggregate([
  {$match:{
   //...
   //...
   }},


  { $addFields : {
        open: {"$toString" : "$open"},
        close : {"$toString" : "$close"},
    }},
]);