updateOne command in mongoose 5.5.11 every time I execute, I get response { "n": 0, "nModified": 0, "ok": 1 } ! what's going wrong? - mongodb

Question

I 'm trying to update a MongoDB document by mongoose model.updateOne command, But every time I execute the command, it responds {ok:1, n:0, nModified:0}
Mongoose model :
var mongoose = require('mongoose');
var measurepropsSchema = new mongoose.Schema({
measureTitle: {
type: String,
unique: true,
required: true
},
measureDescription: {
type:String,
required:false
},
measureSymbol: {
type: String,
required:false,
}
});
var collectionName = 'measureParams'
mongoose.model('Mp', measurepropsSchema, collectionName);
router :
routerm.put('/editbyid/:id', ctrlMeasProps.edit);
Route configuration :
var routesMea = require('./api/routes/measures');
app.use('/mea', routesMea);
and finally edit function :
var Mp = mongoose.model('Mp');
module.exports.edit = function (req, res) {
var measureParams = new Mp();
console.log(req.body);
try{
measureParams.updateOne(
{ _id: req.params.id },
{
measureTitle: req.body.title,
measureDescription: req.body.description,
measureSymbol: req.body.symbol
},
(err, docu) => {
console.log(measureParams);
console.log(err);
console.log('fin');
if (err)
return res.status(500).send(err);
return res.send(docu);
}
)
}catch(e){
console.log(e);
}
};
I requested the below link,
http://localhost:3000/mea/editbyid/5ce8e8555647bf5fb1b51803
requested body is a JSON object like this :
{
"title": "sth",
"description": "It`s sth",
"symbol": "$0"
}
and it responds :
{
"n": 0,
"nModified": 0,
"ok": 1
}
Here is collection "measureParams" data:
{ "_id" : ObjectId("5ce8e8375647bf5fb1b51802"), "measureTitle" : "AAAA", "measureDescription" : "It`s AAAA", "measureSymbol" : "%$" }
{ "_id" : ObjectId("5ce8e8555647bf5fb1b51803"), "measureTitle" : "BBBB", "measureDescription" : "It`s BBBB", "measureSymbol" : "##" }
{ "_id" : ObjectId("5ce8f3b96bcf65fade7c5bcf"), "measureTitle" : "CCCC", "measureDescription" : "It`s CCCC", "measureSymbol" : "$$" }
{ "_id" : ObjectId("5ce90bb3b78b6fbd4b9781ed"), "measureTitle" : "DDDD", "measureDescription" : "It`s DDDD", "measureSymbol" : "#$" }
{ "_id" : ObjectId("5ce90ed9de934a056c00a383"), "measureSymbol" : "Or", "measureDescription" : "It`s EEEE", "measureTitle" : "EEEE", "__v" : 0 }
{ "_id" : ObjectId("5ce912bc5a52000e009b6f2e"), "measureSymbol" : "Ol", "measureDescription" : "It`s FFFF", "measureTitle" : "FFFF", "__v" : 0 }
{ "_id" : ObjectId("5ce937907d656012902702cb"), "measureTitle" : "GGGG", "measureDescription" : "It`s GGGG", "measureSymbol" : "QS", "__v" : 0 }
It should update collection by ObjectId 5ce8e8555647bf5fb1b51803 with new values mentioned in json body, but it does't.
I don't know what is the problem?
Do you have any idea?

Answer 1

updateOne works with model name , try to update your edit function and schema file :
update last line in schema file to this :
var Mp = module.exports = mongoose.model('Mp', measurepropsSchema, collectionName);
And Edit function should look like this:
var Mp = require('/path/to/Mp/schema/file');
module.exports.edit = function (req, res) {
console.log(req.body);
try{
Mp.updateOne(
{ _id: req.params.id },
{
measureTitle: req.body.title,
measureDescription: req.body.description,
measureSymbol: req.body.symbol
},
(err, docu) => {
console.log(err);
console.log('fin');
if (err)
return res.status(500).send(err);
return res.send(docu);
}
)
}catch(e){
console.log(e);
}
};