Get value in Object of Mongoose result

Question

I've query like this const result = await Form.findOne({ _id: req.params.id });
And here is the result of my query:

{ _id: 5a8ea110d7371b7e5040d5c9,
  _user: 5a5c277f8d82ba3644b971c2,
  formDate: 2018-02-22T10:53:04.579Z,
  formElement: 
   { formName: 'Vanilla Form',
     pixel: '23423325',
     fieldRows: [ [Object], [Object] ] },
  formStyle: 
   { globalColor: [ [Object], [Object], [Object] ],
     elementSizing: 'medium',
     elementStyle: 'radius',
     fontFace: 'Open Sans',
     fontSize: { label: '15', button: '15' } },
  __v: 0,
  status: true }

I'm trying to get pixel like this console.log(result.formElement.pixel)
But, when i trying to get the value of pixel, it return undefined.
What's wrong?

Update
Here is my code:

app.get("/view/:id", async (req, res) => {
    const result = await Form.findOne({ _id: req.params.id });
    console.log(result);
    console.log(result.formDate); //return 2018-02-22T10:53:04.579Z,
    console.log(result.formElement.pixel) //return undefined
    // res.render("form", {
    //  result
    // });
});

I've try to edit my code without using async instead using Promise, but it also return undefined

Return `TypeError: Cannot read property 'formName' of undefined` @StoychoTrenchev — Abid Rakhmansyah, Feb 22 '18 at 15:34

score 2 · Answer 1 · answered Feb 22 '18 at 14:43

You're gonna need to do some digging here. Add some more console.logs to debug what is actually going on. For starters, I'd recommend printing out result to see what it actually is. My first guess is that you're trying to print result before the await finishes? I'm not sure, as I don't know exactly when you're trying to print anything out without seeing your code.

Rahul Sharma · Accepted Answer · 2018-02-23T08:55:17.223

2

you need to use exec() function, It returns promise.

app.get("/view/:id", async (req, res) => {
    let result = await Form.findOne({ _id: req.params.id }).exec();
    result = JSON.parse(JSON.stringify(result));
    console.log(result);
    console.log(result.formDate); //return 2018-02-22T10:53:04.579Z,
    console.log(result.formElement.pixel) //return 23423325
    // res.render("form", {
    //  result
    // });
});

edited Feb 23 '18 at 08:55

answered Feb 22 '18 at 16:51

Rahul Sharma

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Still return UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'pixel' of undefined – Abid Rakhmansyah Feb 22 '18 at 23:49
1

result = JSON.parse(JSON.stringify(result)) try this. – Rahul Sharma Feb 23 '18 at 07:58
It work! Can you explain to me why I need to use `JSON.parse(JSON.stringify(result))` ? – Abid Rakhmansyah Feb 23 '18 at 08:18
mongoose return docs by default. check this https://stackoverflow.com/questions/9952649/convert-mongoose-docs-to-json – Rahul Sharma Feb 23 '18 at 08:59

Get value in Object of Mongoose result

2 Answers2