Mongoose Basic for Removing Data from Database

const mongoose = require('mongoose');

mongoose.Promise = global.Promise;

const schema = mongoose.Schema;

//connect

mongoose.connect('mongodb://localhost:27017/Myappy')

const db = mongoose.connection;

//check connection

db.once('open', function(){

console.log('Connection succesfull')

})

//check for error Db

db.on('error', function (err){

console.log('Error', err)

})

const carSchema = new schema({

brand: String,

model: String,

year: Number,

avail: Boolean

})

const Car = mongoose.model('Car', carSchema)

/*const addCar = new Car({

brand: "BMW",

model: "V2s",

year: 2018,

avail: true

})

addCar.save((err, doc)=>{

if(err) return console.log(err)

console.log(doc);

})*/

/*

Car.find((err, doc)=>{

if(err) return console.log(err);

console.log(doc)

})*/

/*

Car.find({brand:"BMW"},(err, doc)=>{

if(err) return console.log(err);

console.log(doc)

})*/

//using id

/*Car.find({_id:"5a9fa4288ad319259c62d1c2"},(err, doc)=>{

if(err) return console.log(err)

console.log(doc)

})*/

//findOne functon

/*Car.findOne({brand:"BMW"}, (err, doc)=>{

if(err) return console.log(err)

console.log(doc)

})*/

/* findById */

/*Car.findById("5a9fa4288ad319259c62d1c2",(err, doc)=>{

if(err) return console.log(err)

console.log(doc)

})*/

/*How to Removing Data*/

//findOneAndRemove

//findByIdAndRemove

//remove

/*Car.findOneAndRemove({brand:"BMW"},(err, doc)=>{ //only one document will be removed

if(err) return console.log(err)

console.log(doc)

})*/

/*

Car.findByIdAndRemove("5a9f9788be0e5c12905fbd84",(err, doc)=>{ //pass the Id

if(err) return console.log(err)

console.log(doc)

})*/

Car.remove({brand:"BMW"}, (err, doc)=>{

if(err) return console.log(err)

console.log(doc)

})