How to parse JSON in node js

Question

I have this JSON array, and what I want is to get the password field alone

var user = [ { _id: 5902086ecbc0dd11e4870fd9, password: '$2a$08$FIpkmFT1WDZggQYyBA4CVuop6pelbKBfUEJ1/KAVIV2Si9Ho1EYhi', email: '[email protected]', lastName: 'v', firstName: 'j', updatedDate: 2017-04-27T15:04:14.483Z, createdDate: 2017-04-27T15:04:14.483Z } ]

I tried to parse it using this code

var obj = JSON.parse(user); console.log(user.password);

but still it is undefined.

It doesn't need parsing. It's already an array. And since it's an array of objects you'll have to use it like this: user[ index ].password; (user[0].password; for the first object ...). — ibrahim mahrir
– ibrahim mahrir, Commented Apr 27, 2017 at 15:56
Possible duplicate of What's the difference between Javascript Object and JSON object — Álvaro González
– Álvaro González, Commented Apr 27, 2017 at 15:58
Possible duplicate of Access / process (nested) objects, arrays or JSON — Heretic Monkey
– Heretic Monkey, Commented Apr 27, 2017 at 15:58
actually that is what I received from my db (I'm using moongose for that), and I dont know how will I get the password field. thanks for the response, it helps — JerVi
– JerVi, Commented Apr 27, 2017 at 15:58

Peter LaBanca · Accepted Answer · 2021-06-01 18:53:09Z

4

User is already a list of objects, so you don't need to parse it. However, it is an array. So if you meant for it to be an array, you'd need to access the password by using this code:

console.log(user[0].password);

edited Jun 1, 2021 at 18:53

answered Apr 27, 2017 at 15:58

Peter LaBanca

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4 Comments

ibrahim mahrir Over a year ago

user is already an array of objects not JSON. JSON is a string representation of objects.

JerVi Over a year ago

yes it solved my problem. sorry for noob question question. Im newby for nodejs. thanks alot

Peter LaBanca Over a year ago

I fixed my answer to clarify that change @ibrahimmahrir

ibrahim mahrir Over a year ago

@PeterLaBanca a response after 4 years, 1 month and 6 days haha. Better late than never :-)

aprogrammer · Accepted Answer · 2017-04-27 15:59:19Z

It's already an array there is nothing to parse. You can access your property via :

console.log(user[0].password);

You can't access your property with user.password because user variable is not object, it's an array, your object is stored at the zero index of your array.

Rohìt Jíndal · Accepted Answer · 2017-04-28 08:26:34Z

You already have JSON object. hence, no need to parse it again.

DEMO

var user = [{ _id: "5902086ecbc0dd11e4870fd9", password: '$2a$08$FIpkmFT1WDZggQYyBA4CVuop6pelbKBfUEJ1/KAVIV2Si9Ho1EYhi', email: '[email protected]', lastName: 'v', firstName: 'j', updatedDate: "2017-04-27T15:04:14.483Z", createdDate: "2017-04-27T15:04:14.483Z" } ]; var password = user[0].password; console.log(password);

Iyanu Adelekan · Accepted Answer · 2017-04-27 16:11:33Z

The variable 'user' is not a JSON array. It's an array with a single Javascript object as its element. JSON.parse(arg) can only be used to parse a JSON string to a plain Javascript object. That being said, to access the javascript object within the array, you can do:

var userData = user[0];

To access the password within the variable, userData, you can do:

var password = userData.password;

Log the password to the console with:

console.log(password);

Khushboo Mahajan · Accepted Answer · 2017-04-27 16:13:37Z

Try This:

var user = [ {_id:'5902086ecbc0dd11e4870fd9',password: '$2a$08$FIpkmFT1WDZggQYyBA4CVuop6pelbKBfUEJ1/KAVIV2Si9Ho1EYhi',email: '[email protected]',lastName: 'v',firstName: 'j',updatedDate: '2017-04-27T15:04:14.483Z',createdDate:' 2017-04-27T15:04:14.483Z' } ]; var obj = user[0]; console.log(obj.password);

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