mongodb mongoose js update not inserting new field

Question

I am trying to insert a new field 'description' with a findOneAndUpdate statement using Mongoose js. It is not working. The code works fine when the field already exists and updates it with the given value. According to the Mongodb documentation $set should create this field automatically if it does not exist.

Any ideas appreciated.

Course.findOneAndUpdate({'_id': CourseId},{$set:{'description':courseDescription}},function(err, course) {
        if (err)
            res.jsonp({response:'err'});

        res.jsonp(course);
    });

possible duplicate of how to get the return value of findAndModify func in MongoDB with mongoose? — Blakes Seven
– Blakes Seven, Commented Jul 13, 2015 at 7:59

real_ate · Accepted Answer · 2015-07-13 20:14:43Z

14

With mongoose you cannot set arbitrary fields, at least not in the way your trying to in your example.

You need to add the description to your Course Schema and then your code example will work.

answered Jul 13, 2015 at 20:14

real_ate

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4 Comments

noobie Over a year ago

I actuallly thought I had this field defined in my schema. When I double checked, I noticed it was not there at all. Thanks

Jarrett GXZ Over a year ago

Wow what a simple but dumb mistake, thanks anyway!

Mohammad Jawad Barati Over a year ago

@real_ate, @noobie @jarret I faced a very weird behavior from the mongoose. Even I defined the new fields in the schema and ModelName.findByIdAndUpdate(id, { $set: { desc: 'val' } }, { new: true, lean: true }) but it does not work. The generated mongodb query has no desc field. IDK what is wrong. Do you have any thought?

real_ate Over a year ago

you should double-check your schema, the point of this answer is that if you don't have things updating then it's likely that your schema is missing something

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