MongoError: After applying the update to the document - node.js

Question

I need some help.
I'm trying to make post req to this route:
router.post('/admin/editFront', isLoggedIn, (req, res, next) => {
req.checkBody('title', 'Title is require').notEmpty();
req.checkBody('aboutUs', 'About us section is require').notEmpty();
req.checkBody('email', 'Check email again').notEmpty().isEmail();
let errors = req.validationErrors();
if(errors) {
req.flash('error_msg', errors.msg);
console.log(errors);
}
let cube = ({
title: req.body.cubeTitle,
img: req.body.cubeImg,
info: req.body.cubeInfo
})
let front = new FrontInfo();
front.title = req.body.title;
front.aboutUs = req.body.aboutUs;
front.email = req.body.email;
front.phone = req.body.phone;
front.cube.push(cube);
// front.socialNet.push(req.body.social);
console.log(front);
FrontInfo.findOneAndUpdate({email: req.body.email}, front, { upsert: true }, (err, doc) => {
if(err) console.log(err);
else {
req.flash('success', doc);
res.redirect('/editFront');
}
});
});
Here is my Schema:
let cube = new Schema({
title: { type: String },
img: { type: String },
info: { type: String }
});
let socialNet = new Schema({
title: { type: String, required: true },
link: { type: String, required: true },
icon: { type: String, required: true }
});
let FrontInfo = new Schema({
title: { type: String, required: true },
aboutUs: {type: String, required: true},
phone: {type: String, minlength: 9, required: true},
email: {type: String, required: true},
cube: {type: [cube], default: []},
updateDate: {type: Date, default: Date.now}
});
So, if I try to create a new Schema it works.
But if I try to update the new one I get this error:
I spent a long time trying to fix it!
Please help me friends

Answer 1

When you use let front = new FrontInfo(); you are creating a new document that has its own _id. This _id is different from the _id of the document that you're updating. You are not allowed to update the _id field, which is why you get the error message
the (immutable) field '_id' was found to have been altered to _id
So instead of creating a new Mongoose document you should just create a new ordinary Javascript object instead:
let front = {};
front.title = req.body.title;
front.aboutUs = req.body.aboutUs;
front.email = req.body.email;
front.phone = req.body.phone;
front.cube = [];
front.cube.push(cube);
This only contains the fields that you've listed.