mongoose setup

1. Import the mongoose module:

const mongoose = require('mongoose');

1. Connect to the MongoDB database:

mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true });

1. Create a connection to the database:

const db = mongoose.connection;

1. Handle the connection events:

db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
  // Connected to the database
});

1. Define a schema for your data:

const userSchema = new mongoose.Schema({
  name: String,
  age: Number,
  email: String
});

1. Create a model based on the schema:

const User = mongoose.model('User', userSchema);

1. Create a new instance of the model:

const newUser = new User({
  name: 'John',
  age: 25,
  email: '[email protected]'
});

1. Save the new user to the database:

newUser.save(function(err, user) {
  if (err) return console.error(err);
  console.log(user.name + ' saved to database.');
});

1. Query the database to retrieve data:

User.find(function(err, users) {
  if (err) return console.error(err);
  console.log(users);
});

1. Close the database connection when done:

db.close();