NodeJS server returning empty data from MongoDB

Question

I am making an app where the app is going to send the POST request data to the nodeJS server. The JSON format of the content looks like: {"encrypteddata": "someencryptedvalueofthetext"}. This data will be saved in a MongoDB.
I created two file one is app.js and another is /models/encdata.js. Content of both the file is given below.
app.js

var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var mongoose = require('mongoose');

app.use(bodyParser.json());

ENCDATA = require('./models/encdata');

mongoose.connect('mongodb://localhost/encdata', { useMongoClient: true }); // the url access the database

var db = mongoose.connection;

app.get('/', function(req, res){

    res.send('Visit /api/encdata');

    app.get('/api/encdata', function(req, res){
    ENCDATA.getENCDATA(function(err, encdata){
            if(err){
                throw err;
            }
            res.json(encdata);
        });
    });

    app.post('/api/encdata', function(req, res){
        var encdata = req.body;
        ENCDATA.addENCDATA(encdata, function(err, encdata){
            if(err){
                throw err;
            }
            res.json(encdata);
        });
    });

 });

 app.listen(3000);
 console.log('Running on port 3000');

encdata.js

var mongoose = require('mongoose');

var encdataencryptSchema = mongoose.Schema({
    encrypteddata: {
        type: String,
        required: true
    }
});

var ENCDATA = module.exports = mongoose.model('encdata', encdataencryptSchema);

module.exports.getENCDATA = function(callback, limit){
    ENCDATA.find(callback).limit(limit);
}

module.exports.addENCDATA = function(encdata, callback){
    ENCDATA.create(encdata, callback);
}

And data in MongoDB is:

{"encrypteddata": "someencryptedvalueofthetext"}

But when I make a GET request to the url localhost:3000/api/encdata it shows [] (an empty array although I have data). Even the POST request is not working and I am not able to save any data.

You are not closing these braces: app.get('/', function(req, res) { — Héctor Valls
– Héctor Valls, Commented Nov 2, 2017 at 14:50
I am closing that and I am not getting any typo error like that. — Prashant Dey
– Prashant Dey, Commented Nov 2, 2017 at 14:52
I tried that too and the problem is the same. However what I did is also gonna work. — Prashant Dey
– Prashant Dey, Commented Nov 2, 2017 at 14:59
Have you tried passing a limit to ENCDATA.getENCDATA() method? — Héctor Valls
– Héctor Valls, Commented Nov 2, 2017 at 15:03

X-User · Accepted Answer · 2017-11-04 11:42:56Z

1

I rewrote your code by changing the name of the variable and it worked for me. The app.js file looks something like this:

var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var http = require('http');

app.use(bodyParser.json());

AES = require('./models/aes');

mongoose.connect('mongodb://localhost/aes', { useMongoClient: true }); //     the url access the database

var db = mongoose.connection;

app.get('/', function(req, res){

res.send('Visit /api/aes');

 app.get('/api/aes', function(req, res){
      AES.getAES(function(err, aes){
         if(err){
             throw err;
         }
         res.json(aes);
     });
 });

    app.post('/api/aes', function(req, res){
        var aes = req.body;
         AES.addAES(aes, function(err, aes){
             if(err){
                throw err;
            }
            res.json(aes);
        });
    });

});



app.listen(3000);
console.log('Running on port 3000');

In the encdata.js you can change the variable to AES. Name the mongodb collection and database as aes.

answered Nov 4, 2017 at 11:42

X-User

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1 Comment

Prashant Dey Over a year ago

Thanks! This worked for me. But I cannot understand what was the problem in my code. Just by changing the variable how this can work.

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