install mangoose

npm install mongoose

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To connect to the mongodb by using mongoose
ex:app.js

const mongoose=require('mongoose');
mongoose
    .connect('url');
    .then(res=>app.listen(3000));
    .catch(err=>console.log(err));

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To create schema
ex:model folder student.js

const mongoose = require('mongoose');
const studentSchema = mongoose.Schema({
    name:{
        type:String,
        required:true
    },
    studentid:{
        type:Number,
        required:true
    }
});
module.exports=mongoose.model('students',studentSchema);

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To create a students
ex:controllers folder

console.log('hi')