How to add save another Schema data to a model?

Question

I am using mongoose with Mongodb v3.4.3

Below is my image model code

const mongoose = require("mongoose");
const CoordinateSchema = require("./coordinate");

const ImageSchema = new mongoose.Schema({
    image_filename: {
        type: String,
        required: true
    },
    image_url: {
        type: String,
        required: true
    },
    coordinates: [CoordinateSchema],
});

Below is my CoordinateSchema code

const mongoose = require("mongoose");

const CoordinateSchema = new mongoose.Schema({
    coordinates : {
        type: Array,
        default: [],
    }
});

module.exports =  CoordinateSchema;

Below is my api js code running on express,

    router.post('/receiveCoordinates.json', (req, res, next) => {

        Image.findOneAndUpdate({image_filename:req.body.file_name}).then((image) =>    {


       })
    });

How to finish this code so I can store coordinates data in Image model.

Thanks.

Answer 1

UPDATE

To update the coordinates inside of findOneAndUpdate, you simply check that the returned document isn't undefined (which would mean your image wasn't found). Modify your api.js code like so:

router.post('/receiveCoordinates.json', (req, res, next) => {
    Image.findOneAndUpdate({image_filename:req.body.file_name}).then((image) => {
        if (!image) return Promise.reject(); //Image not found, reject the promise
        image.where({_id: parent.children.id(_id)}).update({coordinates: req.body.coordinates}) //Needs to be an array
            .then((coords) => {
                if (!coords) return Promise.reject();
                //If you reach this point, everything went as expected
            });
    }).catch(() => {
        console.log('Error occurred');
    );
});

---

Here's my guess why it isn't working.

In ImageSchema , you are sub-nesting an array of CoordinateSchema . But CoordinateSchema is a document which already contains an array .

This is probably not what you're looking for. If you're using mongoose version 4.2.0 or higher , you can nest CoordinateSchema inside of ImageSchema as a single document. Re-write your ImageSchema like this:

// ...

const ImageSchema = new mongoose.Schema({
    // ...
    coordinates: CoordinateSchema,
});

If this didn't work or doesn't resolve your issue, please let me know so we can work together to find a solution.