Adding multiple items to mongodb

Question

I have this schema with

const userSchema = new mongoose.Schema(
{
    skills: [{ name: { type: String, unique: true }, level: { type: Number } }],

and I am trying, after getting an array of objects from the client, to add all of them at once under a user in MongoDB

my old implementation when it was only an array is this one below. I have no idea how to go about it now tho. Could anyone help me?

const { email } = session;
const { skill } = req.body;
if (req.method === 'POST') {
    try {
        const user = await User.findOne({ email });

        const updatedUser = await User.findOneAndUpdate(
            { email },
            { skills: [...user.skills, { name: skill }] }
        );

Marco Bertelli · Accepted Answer · 2021-11-25 18:59:52Z

1

const { email } = session;
// object from the client
const { skills } = req.body;
if (req.method === 'POST') {
    try {

        const updatedUser = await User.findOneAndUpdate(
            { email },
            { $set: {skills} }
        );

the best is getting the array correctly formatted from front-end, if not use a map before call findOneAndUpdate

answered Nov 25, 2021 at 18:59

Marco Bertelli

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2 Comments

illyria Over a year ago

So I tried till now and I couldn't manage to spread the existing array, and add the new elements to it with $set, but I found $addToSet fixed that for me, So I basically did

const { skill: skills } = req.body; 	if (req.method === 'POST') { 		try { 			const user = await User.findOne({ email });  			const updatedUser = await User.findOneAndUpdate( 				{ email }, 				{ $addToSet: { skills } } 			);

Your answer tho put me on the right track, and probably there is a way to do it with $set that I couldn't manage to find. Thank you

Marco Bertelli Over a year ago

nice to hear it man!

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