CODEWITHSUNDEEP
javascriptnode.jsmongodbmongoose
platizin
platizin

Reputation: 872

Get plain javascript object (or JSON-ready object) from mongoose document

Given the created document from the .save method, or any other method that returns a document, how would I convert that document to a plain javascript object with primitive JSON types? I've tried .toJSON and .toObject but they both still maintain mongoose's ObjectId data type, when I want a string instead:

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/test', {
    useNewUrlParser: true,
    useUnifiedTopology: true
});

const Cat = mongoose.model('Cat', { name: String });
const kitty = new Cat({ name: 'aed' });

kitty.save()
.then(data => {
    console.log(data.toObject()._id instanceof mongoose.Types.ObjectId)
    console.log(data.toJSON()._id instanceof mongoose.Types.ObjectId)
    console.log(data.toObject({ virtuals: true, getters: true })._id instanceof mongoose.Type.ObjectId)
    console.log(data.toJSON({ virtuals: true, getters: true })._id instanceof mongoose.Types.ObjectId)
    return data
})
.then(data => data.remove())
.catch(console.error);

true
true
true
true

I know I can use .lean(), but I specifically need to the document as well as its plain object version

Thanks in advance

Upvotes: 1

Views: 4134

Answers (2)

SuleymanSah
SuleymanSah

Reputation: 17858

You can first use toObject, then JSON.stringify, and then JSON.parse.

router.post("/cat", (req, res) => {
  const kitty = new Cat({ name: "Masha" });

  kitty.save().then(data => {
    const obj = data.toObject();
    const str = JSON.stringify(obj);
    const json = JSON.parse(str);
    console.log(typeof json._id);
    res.send(data);
  });
});

The result of console.log(typeof json._id) will be string.

Also to remove version key, we can apply versionKey false option in the schema definition.

const mongoose = require("mongoose");

const catSchema = new mongoose.Schema({ name: String }, { versionKey: false });

const Cat = mongoose.model("Cat", catSchema);

module.exports = Cat;

Upvotes: 2

Arayik
Arayik

Reputation: 144

You can spread that document (see example below). But in that case you will lose properties that is extended from parent prototype.

console.log({...data});

Upvotes: 0

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