write mongo db schema and connect to mongo db serve, create collection in databse using api | node js tutorials

 create collection of models in nodejs app

create a table in mongodb

create personSchema,js in models app

var mongoose= require("mongoose");

const PERSON_SCHEMA = new mongoose.Schema(

{

fname:{type:String},

lname:{type:String},

mno:{type:String},

addr:{type:String},

}

)

module.exports = mongoose.model("persons",PERSON_SCHEMA);

import mongoose

write schema

export this schema

after write this schema

insert data into table using api post create method

let bodyParser = require('body-parser');

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({ extended: true }));

var PERSON_SCHEMA=require("./models/personSchema,js");

app.post('/create',async (req, res, next)=> {

let body = req.body;

let new_body={

fname: body.firstname,

lname: body.lastname,

mno: body.mobilenum,

addr:body.address

}

let new_person = new PERSON_SCHEMA(new_body);

new_person.save().then(result =>

{

res.send("success")

}).catch(err => {

res.send("faile")

})

})

ist import this schema into third.js file 

and

create api post method

name is create

get data from api or postman

if u send like this -> it wil show sucess on api output

after sucesfful 

in atabse if not created databse - it will create

if not createc collection, it will create collection

third.js

const express = require('express');

const app = express();

var user_routing= require("./controller/usercontroller");

var role_routing= require("./controller/rolecontroller");

var PERSON_SCHEMA=require("./models/personSchema,js");

var mongoose= require("mongoose");

mongoose.connect('mongodb://localhost:27017/mydatabase' ,

{

useNewUrlParser: true,

useUnifiedTopology: true

})

.then((res) => {

console.log(

'connected'

);

})

.catch((err) => {

console.log(

`not connected`,

err

);

});

let bodyParser = require('body-parser');

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({ extended: true }));

app.post('/create',async (req, res, next)=> {

let body = req.body;

let new_body={

fname: body.firstname,

lname: body.lastname,

mno: body.mobilenum,

addr:body.address

}

let new_person = new PERSON_SCHEMA(new_body);

new_person.save().then(result =>

{

res.send("success")

}).catch(err => {

res.send("faile")

})

})

const PORT=3000;

app.use(express.json());

app.use("/user",user_routing);

app.use("/role",role_routing);

app.listen(PORT,() =>

{

console.log("server on::"+PORT)

})

models/personschema.js

var mongoose= require("mongoose");

const PERSON_SCHEMA = new mongoose.Schema(

{

fname:{type:String},

lname:{type:String},

mno:{type:String},

addr:{type:String},

}

)

module.exports = mongoose.model("persons",PERSON_SCHEMA);