Loading JSON files and data in a single request expresses node js

Question

I have the following form written in JADE

<form id="formAddchallandetails" action="/adddata" method="post" name="adduser">
    <input id="inputunloadingDestination1" type="text" name="finalchallan[1][unloadingDestination]" placeholder="unloading Destination"> 
    <input id="inputCCNFForm1" type="text" name="finalchallan[1][CCNFForm]" placeholder=" Challan Number">
    <input id="inputtollCopy1" type="file" name="finalchallan[1][tollCopy]" > 

    <input id="inputunloadingDestination1" type="text" name="finalchallan[2][unloadingDestination]" placeholder="unloading Destination">
    <input id="inputCCNFForm2" type="text" name="finalchallan[2][CCNFForm]" placeholder=" CCNF form">
    <input id="inputtollCopy2" type="file" name="finalchallan[2][tollCopy]" >
    <button id="btnSubmit" type="submit">submit</button>
</form>

I want this form to send data of files and other arrays as a JSON object in Express.js

My app.js

    app.use(bodyParser.json());
    app.use(bodyParser.urlencoded({ extended: true }));//set to true for passing array objects from form to route
    app.use(cookieParser());
    app.use(bodyParser({ keepExtensions: true, uploadDir: "uploads" }));

My index.js

router.post('/adddata', function(req, res) {
console.log("body");
console.log(req.body);
console.log("files");
console.log(req.files);

});

The resulting conclusion:

body
  {
    finalchallan: 
    [
        { 
            unloadingDestination: 'sdcsdf',       
            CCNFForm: 'zsd',
            tollCopy:'abc.txt',      
        },
        { 
            unloadingDestination: 'sdcsdf',       
            CCNFForm: 'zsd',       
            tollCopy:'xyz.txt',
        }
    ],
    tollCopy: '' }
files
undefined

The expected result is to receive JSON data, as shown above, and receive all file data with the file name, tmpname, etc., to save the file in a directory. Currently, I only get the file name.

Parameters:

If I use multer and / or change the form enctype = "multipart / form-data" , because it does not pass my JSON data in object form, but treats it as a string.