data can't be updated in mongodb

Question

This error appears in my node js console:

(node:6048) UnhandledPromiseRejectionWarning: MongoError: document must be a valid JavaScript object

router.post('/datapassfup', (req, res) => {
        console.log("submitted values are",req.body)
        MongoClient.connect(url, function(err, db) {
            if (err) throw err;
            var dbo = db.db("mohan");
            var myobj =req.body;
            dbo.collection("customers").updateOne({$set:{myobj}}, function(err, res) {
              if (err) throw err;
              //console.log("1 document inserted");
              db.close();
            });
          });
        res.json({
            statusCode: 200,
            result: "hi how are you!",
        })
    }
    );

data can't be update in mongodb database...Give any solution — Mohanraj
– Mohanraj, Commented Jul 16, 2019 at 7:24
What do you mean by data can't be update in mongo database? Are you checking the right table? Because the updated object returned by node.js is snapshot of new data on database side. — Gandalf the White
– Gandalf the White, Commented Jul 16, 2019 at 10:31

Malik Awan · Accepted Answer · 2019-07-16 11:38:28Z

1

updateOne() has first parameter as filter. Define your filter and then update.

//suppose you are getting id in order to update
    let userId = req.body.updatedUser.id;
    let userName = req.body.updatedUser.username;
    let name = req.body.updatedUser.name;
    dbo.collection("customers").updateOne({_id: userId},{$set:{name, username:userName}}, 
    function(err, res) {
                  if (err) throw err;
                  //console.log("1 document inserted");
                  db.close();
                });
              });

edited Jul 16, 2019 at 11:38

answered Jul 16, 2019 at 7:55

Malik Awan

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12 Comments

Mohanraj Over a year ago

This type of code I can get an updated value in node js console but it does not update on mongodb. I could not find the reason. Please help me

Malik Awan Over a year ago

Can you write the object that you are getting in req.body ? Furthermore, have you confirmed that you are connecting to DB?

Mohanraj Over a year ago

updated values are { updatedUser: { id: 1, name: 'hello', username: 'Raja Gokul' } }--this is what am getting in node js

Mohanraj Over a year ago

Yes its connected to DB

Malik Awan Over a year ago

So you are getting all values inside "updatedUser" object. If this is what you are getting, i updated my answer accordingly. Just make sure about the id field. _id in MongoDB stores in the form of hexadecimal. Since you are getting id as 1, so i don't think so you want to compare it with _id in MongoDB. apart from _id, do you have id field in MongoDB as well? if so replace _id with id.

|

Sanaullah · Accepted Answer · 2019-07-24 12:36:01Z

0

I think you were not passing the condition that where you want the update like add name=mohan .

Use cors for cross origin request and body parser for parse the form data

const cors = require("cors");
const app = express();
const bodyParser = require("body-parser");
app.use(bodyParser());
app.use(bodyParser.urlencoded());
app.use(cors());
var MongoClient = require('mongodb').MongoClient;
//url like var url = "mongodb://localhost:27017"
     router.post('/datapassfup', (req, res) => {
                console.log("submitted values are",req.body)
                MongoClient.connect(url, function(err, db) {
                    if (err) throw err;
                    var dbo = db.db("mohan");
                    var myobj =req.body;
                    dbo.collection("customers").updateOne({name:"mohan"},{$set:{myobj}}, function(err, res) {
                      if (err) throw err;
                      //console.log("1 document inserted");
                      db.close();
                    });
                  });
                res.json({
                    statusCode: 200,
                    result: "hi how are you!",
                })
            }
            );

edited Jul 24, 2019 at 12:36

answered Jul 16, 2019 at 7:57

Sanaullah

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4 Comments

Mohanraj Over a year ago

This type of code I can get an updated value in node js console but it does not update on mongodb. I could not find the reason. Please help me

Sanaullah Over a year ago

check the data is came with request or not ?

Mohanraj Over a year ago

Am fresher so I do not know exactly how to do this so give me some examples crud application using React js with mongoDB and nodeJS

Sanaullah Over a year ago

now i have add more details if this answer solve your problem make accept it as answer

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