Can I use json file as a module in node.js

Question

I have a JSON module which contains empty containers like this:

{
    "files": {
        "rootNeeded":[],
        "folders":[],
        "files":[],
        "images":[],
        "text":[],
        "unknown":[]
    },
}

and I wonder if I can push data into this from another module simply by using array.push method. Something like ...

var myModule=require("./myJsonFile");
function(){
    some magic here...
    myModule.files.files.push(files);
}

and after this can I use this in a third node module like this...

//my third module
console.log(files.files)

in the end it will be like dynamic database each time when program called will be refreshed.

possible duplicate of is there a require for json in node.js — gnat
– gnat, Commented May 13, 2015 at 7:41

victorkt · Accepted Answer · 2015-05-12 23:02:54Z

1

You can, however the changes you make will NOT be persisted. Also, if you use cluster, every process will have a different version of your object.

myJsonFile.json

{
  "files": {
    "rootNeeded": [],
    "folders": [],
    "files": [],
    "images": [],
    "text": [],
    "unknown": []
  }
}

mod1.js

var json = require('./myJsonFile');

function pushData() {
  json.files.files.push('test 1');
  json.files.files.push('test 2');
}

pushData();

mod2.js

var json = require('./myJsonFile');
require('./mod1');

console.log(json);

// { files: 
//   { rootNeeded: [],
//     folders: [],
//     files: [ 'test 1', 'test 2' ],
//     images: [],
//     text: [],
//     unknown: [] } }

answered May 12, 2015 at 23:02

victorkt

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4 Comments

nikoss Over a year ago

i dont understand first we call myjasonfile then called mod1 they are not teh same module

victorkt Over a year ago

If you create these modules and run node mod2.js you will have the correct result. mod2 calls mod1 and mod1 pushes the data to the array, following the example you provided in your question.

nikoss Over a year ago

my question here if i push with mod1 and in the late program if i call directly json can i see this changes

victorkt Over a year ago

What do you mean by "call directly json"? If you do what I did in my example (using require('./myJsonFile')), yes you will have the changes.

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