MongoDB schema does not insert property when using with insertOne function

Question

The initial problem was solved, thanks!

Now, whenever I insert the document it comes out like this:

{

_id: "5e3b64b6655fc51454548421",
todos: [ ],
title: "title"

}

It should look like this since in the schema the "title" property is above the "todos" property.

{

_id: "5e3b64b6655fc51454548421",
title: "title",
todos: [ ]

}

JavaScript

//project schema
const schema = mongoose.Schema({
    title: String,
    todos: []
});

const Project = mongoose.model('Project', schema);

//add a project
app.post('/addProject', (req, res) => {
    const collection = db.collection('projects')
    const proj = new Project({title: req.body.title});
    collection.insertOne(proj, function(err, results) {
        if (err){
            console.log(err);
            res.send('');
            return
        }
        res.send(results.ops[0]) //retruns the new document
    })
})

score 2 · Answer 1 · answered Feb 06 '20 at 01:06

2

You're renaming your key in below line:

const proj = new Project({title: req.body.projTitle});

Your schema expects projTitle, try to change it to:

const proj = new Project({projTitle: req.body.projTitle});

Mongoose schema defines the structure of your document. Whenever you try to save additional field that's not defined in your schema it will be simply ignored by mongoose.

answered Feb 06 '20 at 01:06

mickl

48,568
9
60
89

Thank you for the answer, that was the problem. Just one more thing, now whenever I insert one in the DB, the todos array is put above the title property in the JSON object. – Vlad Tanasie Feb 06 '20 at 10:59
@VladTanasie it's not a good idea to rely on the order of keys in MongoDB: https://stackoverflow.com/questions/5046835/mongodb-field-order-and-document-position-change-after-update/6453755#6453755 – mickl Feb 06 '20 at 13:37

score 1 · Accepted Answer · answered Feb 06 '20 at 04:10

You are entering wrong key while creating new Project object. Change it to the correct key as per your schema and you'll be good to go.

//project schema
const schema = mongoose.Schema({
    projTitle: String,
    todos: []
});

const Project = mongoose.model('Project', schema);

//add a project
app.post('/addProject', (req, res) => {
    const collection = db.collection('projects')
    **const proj = new Project({projTitle: req.body.projTitle});** // changes are here
    collection.insertOne(proj, function(err, results) {
        if (err){
            console.log(err);
            res.send('');
            return
        }
        res.send(results.ops[0]) //retruns the new document
    })
})

score 1 · Answer 3 · edited Feb 07 '20 at 04:44

1

Please try to look at the code below.

const collection = db.collection('projects')
const proj = new Project({projTitle: req.body.projTitle}); //make changes here

edited Feb 07 '20 at 04:44

Juhil Somaiya

873
7
20

answered Feb 06 '20 at 11:40

competitive coder

21
5

MongoDB schema does not insert property when using with insertOne function

3 Answers3