Getting undefined key value return when getting object value

Question

In my nodejs project I'm fetching data from my MongoDB and retrieve after querying with this code:

app.get('/:user_id', (req, res) => {
  Contact.findById(req.params.user_id, function (err, user) {
    if (err){
        res.send(err);
    }
    let user_temp = JSON.stringify(user)
    console.log("1 - ", user);
    console.log("2 - ", user.name);
    console.log("3 - ", user_temp)
    console.log("4 - ", user_temp.phone);
    res.render('userInfo', {user: user})
  });  
})

The log I get is this

1 -  {
  _id: 5f56a47d5a246e5ff8b67129,
  name: 'UserA',
  phone: '054523423',
  __v: 0
}
2 -  undefined
3 -  {"_id":"5f56a47d5a246e5ff8b67129","name":"UserA","phone":"054523423","__v":0}
4 -  undefined

When I'm trying to console.log those values before or after JSON.stringify I always get undefined. I've looked at other bugs and I can't seem to find an explanation. What am I doing wrong?

let user_temp = JSON.stringify(user) before his line what does typeof user give? I guess it is the string that's why it is undefined — Ravi
– Ravi, Commented Sep 10, 2020 at 17:45
tip: use if (err) return res.send(err) else /foo will break with various errors — Lawrence Cherone
– Lawrence Cherone, Commented Sep 10, 2020 at 18:00

Soragim · Accepted Answer · 2020-09-10 17:55:06Z

1

Ohh now I get it. It was a mongoose problem. Since I did not define name in the Contact schema but rather username, the mongoose apparently could not interpret the Object.key notation. I've changed my Contact model Scheme and now it works!

answered Sep 10, 2020 at 17:55

Soragim

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