JSON.stringify not working for mongoose object in NodeJs

Question

I got an error while console mongoose object. Here is my code:-

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function () {
    console.log('Yea! we are connected.');
});
console.log(JSON.stringify(mongoose));

Here is Error Message:-

The error is pretty obvious. Why do you want to convert the mongoose object to JSON anyways? — qqilihq
– qqilihq, Commented Jan 7, 2016 at 7:49
What are you trying to do? That's wrong you are trying to stringify the module object. — michelem
– michelem, Commented Jan 7, 2016 at 7:50
I just want to see what data are exits in mongoose object. If i use console.log(mongoose) i got result but not appropriates.@qqilihq,@Michelem — vineet
– vineet, Commented Jan 7, 2016 at 8:04

chridam · Accepted Answer · 2016-01-07 07:50:33Z

2

You may want to try the util.inspect(object) method which returns a string representation of an object:

var util = require('util');
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test');
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function () {
    console.log('Yea! we are connected.');
});
console.log(util.inspect(mongoose, { showHidden: true, depth: null }));

answered Jan 7, 2016 at 7:50

chridam

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1 Comment

vineet Over a year ago

I can see whole mongoose attributes and members with naked eye.Thanks @chridam.

trquoccuong · Accepted Answer · 2016-01-07 07:49:16Z

2

inside mongoose module have this logic

Mongoose.prototype.Mongoose = Mongoose;

It makes Circular structure ( object self-reference) . You cant default stringify an Circular Object. If you want to use JSON.stringify add your custom logic handle

JSON.stringify(obj,function(k,v){ //logic})

answered Jan 7, 2016 at 7:49

trquoccuong

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