Basic Connected to MongoDB using Mongoose, node.js, and express.js

cover images

First of all, create a folder on your PC

mkdir anyFolderName
cd anyFolderName

Now initialization of some packages and dependencies.

npm init <initializer> can be used to set up a new or existing npm package.

npm init -y

npm init package

Now install some node packages like express, cors, dotenv, mongoose, MongoDB, and also install -g nodemon.

npm install express cors dotenv mongoose mongodb
npm install -g nodemon

Some dependencies will be installed in the package.json file

package.json file install dependencies

Now create some files like app.js, server.js, .env, and .gitignore

create a some files

.gitignore file write ignore files like node_modules, .env, etc

node_modules
.env

.gitignore file

Now write some line codes on app.js file

// app.js file
const express = require("express");
const cors = require("cors");
const mongoose = require("mongoose")
const app = express();

// middleware
app.use(cors());
app.use(express.json());


// root router
app.get("/", (req, res) => {
    res.status(200).json({
        status: "success",
        message: "project is running...."
    })
})

// not found router
app.all("*", (req, res) => {
    res.status(400).json({
        status: "failed",
        message: "not found router"
    })
})

module.exports = app;

Now write some line codes of the server.js file and connected Mongoose to the MonogoDB compass of a local database.

// server.js file
const app = require("./app");
require("dotenv").config()
const mongoose = require("mongoose");

// database connected
// database connect local of mongodb compass
 mongoose.connect('mongodb://127.0.0.1:27017/databaseNameHere').then(() => {
    console.log("successfully connected server")
}).catch((error) => {
    console.log(error.message)
})

// server
const port = process.env.PORT || 5000;
app.listen(port, () => {
    console.log(`listen port at : ${port}`)

The server.js file and connected Mongoose to the MonogoDB alter of an online database.

First of all, create a new cluster after already having a MongoDB account.

click + New Project

create a project and use any project name like (user-rendome-mongoose) here then click the next button

Now click Create Project button

Now create a database click Build a Database

Then select Free database of MongoDB and click Create

Now write a username and password must copy of userName and password then past of node pad or any here

then set the id address click like (ID Adress: 0.0.0.0/0) and Description write any message and click Add Entry button

Finally, click Finish and Close button

Click Go To Dashboses Button

now click connect button to find a MongoDB alter connection URL

Select Connect using MongoDB compass

2 Copy the connection string, then open MongoDB Compass URL:

Now edit server.js file with some line codes and it connected to online MongoDB alter database

const app = require("./app");
require("dotenv").config();
const mongoose = require("mongoose");

// database connected online
mongoose
  .connect(
    `mongodb+srv://userRandomeAdmin:${process.env.DATABASE_PASS}@cluster0.nmlzz1d.mongodb.net/databaseNameHere`
  )
  .then(() => {
    console.log("successfully connected server");
  })
  .catch((error) => {
    console.log(error.message);
  });

// server
const port = process.env.PORT || 5000;
app.listen(port, () => {
  console.log(`listen port at : ${port}`);
});

Now create a Mongoose schema and mode design

const mongoose = require("mongoose");
// mongoose schema deign
const userSchema = mongoose.Schema(
  {
    name: {
      type: String,
      required: [true, "please proved a name"],
      trim: true,
    },
    address: {
      type: String,
      trim: true,
    },
  },
  { timestamps: true }
);

// SCHEMA -> MODEL -> QUERY
// model design
const User = mongoose.model("User", userSchema);

// save a data of user example router
app.post("/user", async (req, res) => {
  const userInfo = new User(req.body);
  const result = await userInfo.save();
  res.status(200).json({
    status: "success",
    data: result,
  });
});

Now edit the package.json file and add 2-line codes of scripts.

"scripts": {
    "start":"node server.js", // line 1
    "start-dev":"nodemon server.js", // line 2
    "test": "echo \"Error: no test specified\" && exit 1"
  },

package.json file add 2-line codes

Now run the project using the command npm run start-dev of command PowerShell and see the output

output of terminal

Post data of Postman

Finally, store data from the MongoDB database