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how to connect mongoose database with nodejs Code Example
connecting to mongoDB using mongoose 
//Import the mongoose module
var mongoose = require('mongoose');

//Set up default mongoose connection
var mongoDB = 'mongodb://127.0.0.1/my_database';
mongoose.connect(mongoDB, {useNewUrlParser: true, useUnifiedTopology: true});

//Get the default connection
var db = mongoose.connection;

//Bind connection to error event (to get notification of connection errors)
db.on('error', console.error.bind(console, 'MongoDB connection error:'));
Source: developer.mozilla.org
mongoose connection nodejs 
const mongoose = require('mongoose');

const connectDB = async () => {
    mongoose
        .connect('mongodb://localhost:27017/playground', {
            useCreateIndex: true,
            useNewUrlParser: true,
            useUnifiedTopology: true,
            useFindAndModify: false
        })
        .then(() => console.log('Connected Successfully'))
        .catch((err) => console.error('Not Connected'));
}

module.exports = connectDB;
node js connect to mongodb using mongoose 

//connect with mongodb
mongoose.connect('mongodb://localhost:27017/your_db_name', {useNewUrlParser: true});
//you can also specify with user and pass
mongoose.connect('mongodb://username:password@host:port/database?options...', {useNewUrlParser: true});
//or goto docs https://mongoosejs.com/docs/connections.html
Source: mongoosejs.com
how to connect mongoose database with nodejs 
const mongoose = require("mongoose");

const databaseConnection = () => {
  const dbUri = process.env.DB_URI || "mongodb://localhost:27017/codershouse";
  mongoose
    .connect(dbUri, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    })
    .then((data) => {
      console.log(
        `MongoDb Database Connected to the Server : ${data.connection.host}`
      );
    })
    .catch((err) => {
      console.log(`Some Database Connection Error Occured :- ${err}`);
    });
};

module.exports = databaseConnection;



Javascript

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