avoid duplicates on MongoDB using Mongoose

Question

Hi I'm new to MongoDB and Moongoose I'm trying to avoid my api's users to store on the Mongo database duplicated contact's name but seems like it's not working at all.

This is how I'm trying to do it right now the name and the phone number are mandatory and also the name must be unique otherwise it should throw an error.

const contactSchema = new mongoose.Schema({
        name: {
            type: String,
            required: true,
            unique: true
        },
        number: {
            type: Number,
            required: true
        }
    });

app.post('/api/persons', (request, response) => {

    const body = request.body;

    const person = new Contact({
        name: body.name,
        number: +body.number
    });

    person.save()
        .then(saved => {
            response.json(saved);
        })
        .catch(error => {
            return response.status(400).json({
                error: 'content missing'
            });
        });

})

If I send a post request with missing name or number it already throws an error but seems like it's not gettin the unique value validation.

Answer 1

Finally found a package that allows me to avoid duplicted entries on Mongo. I used this package following the documentation instructions:

https://github.com/blakehaswell/mongoose-unique-validator#readme

This is the code I had to write:

const uniqueValidator = require('mongoose-unique-validator');

const contactSchema = new mongoose.Schema({
        name: {
            type: String,
            required: true,
            unique: true
        },
        number: {
            type: Number,
            required: true
        }
    });

    contactSchema.plugin(uniqueValidator);