Cannot make a search on all fields

Hello, i am new with search index in node JS and i tried to make a search engine from Json file but it doesn’t work for all fields. here is my code

var express = require('express');
var router = express.Router();
var fs = require('fs')
var JSONStream = require('JSONStream')
var options = {
    "batchSize": 1000,
        "fieldedSearch": true,
        "preserveCase": false,
        "storeable": true,
        "searchable": true,
        "indexPath": "data",
        "logLevel": "error",
        "nGramLength": [1]
}
var searchIndex = require('search-index')
var dataset = require('../node_modules/reuters-21578-json/data/justTen/justTen.json')


/* GET users listing. */
router.get('/', function(req, res, next) {


    searchIndex(options, function(err, si) {
       // si.flush(function(err) {
        // if (!err) console.log('success!')
        //})
        si.concurrentAdd(dataset, {}, function(err) {
            if (!err) console.log('indexed!')
            else return callback(err, {})
            console.log(si.fields);
            console.log('doing a test search...')
            si.search({"query": [
                {AND: {'*':["COCOA"]}}]} , function(err, results) {
                console.log('total hits: ' + results.totalHits)
                for (var i = 0; i < results.hits.length; i++) {
                    console.log()
                    console.log('* ' + results.hits[i].document.title + ' *')
                    console.log('* ' + results.hits[i].document.date + ' *')
                    console.log()
                    console.log('--------------------')
                }
                res.status(200).send(results.hits)
            })
        })



    });

    //res.end();


    // res.end(results.hits);
});

module.exports = router;

[Samy78]

ok thank you, now it works, but can i stream json file instead of str file ?

[Samy78]

ok thank you