CRUD – MongoDB + NodeJS

crud-mongodb-nodejs.js

// CRUD create read update delete

const { MongoClient, ObjectID } = require('mongodb')

const connectionURL = 'mongodb://127.0.0.1:27017'
const databaseName = 'databaseName'


MongoClient.connect(connectionURL, { useNewUrlParser: true }, (error, client) => {
    if (error) {
        return console.log('Unable to connect to database!')
    }

    const db = client.db(databaseName)
    
    // CREATE

    db.collection('users').insertOne({
        name: 'Peter',
        age: 26
    }).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    db.collection('users').insertMany([
        {
            name: 'Daniel',
            age: 29
        }, {
            name: 'Günther',
            age: 50
        }
    ]).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    // READ

    db.collection('users').findOne({
        _id: new ObjectID('5ce0881d3b614fa9dc57835b'),
        age: 32
    }).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    db.collection('users').find({age: 18}).toArray().then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    // UPDATE

    db.collection('users').updateOne({
        name: 'Daniel'
    }, {
        $set: {
            age: 30
        }
    }).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    db.collection('users').updateMany( {
        age: 30
    }, {
        $set: {
            name: 'Finn',
            age: 18
        }
    }).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    // DELETE

    db.collection('tasks').deleteOne({
        description: 'Finish coding the giphy app'
    }).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

    db.collection('users').deleteMany({
        age: 50
    }).then((result) => {
        console.log(result)
    }).catch((error) => {
        console.log(error)
    })

})