Reading json file in node.js

Question

This must be something really silly. After spending the last few hours, I am here for help. I have a users.json file

{
    "Test_Session": {
        "test_SessionID": [
            {
                "$": {
                    "id": "1"
                },
                "test_type": [
                    "1"
                ],
                "Test_IDtest": [
                    "1"
                ],
                "DataURL": [
                    "data1"
                ]
            }
        ]
    }
}

I try to read DataURL by

 var jsonData = require('./users.json');
var test = JSON.stringify(jsonData)
console.log(test.Test_Session.test_SessionID.DataURL);

In console, I get "Can't read property test_SessionID of undefined".

What's going on?

Alex Dovzhanyn · Accepted Answer · 2017-10-11 19:32:23Z

2

Your main issue is that test_SessionID is an array, so when you try to access DataUrl, it will be undefined. You need to select the index of the test_SessionID object you want to read from. Try this:

console.log(test.Test_Session.test_SessionID[0].DataURL);

Also, you don't need to JSON.stringify anything, Node automatically reads the file in as JSON, so just doing

var jsonData = require('./users.json');
console.log(jsonData.Test_Session.test_SessionID[0].DataURL);

should work fine.

answered Oct 11, 2017 at 19:32

Alex Dovzhanyn

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Alex Dovzhanyn Over a year ago

Glad to help :)

J0sh0nat0r · Accepted Answer · 2017-10-11 19:31:39Z

1

Node is already interpreting the JSON, try the following:

var test = require('./users.json');
console.log(test.Test_Session.test_SessionID[0].DataURL);

edited Oct 11, 2017 at 19:31

answered Oct 11, 2017 at 19:21

J0sh0nat0r

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