mongoose npm

1$ npm install mongoose

1$ npm install mongoose

1npm install -g mongodb
2
3npm install -g mongoose

1const mongoose = require('mongoose');
2mongoose.connect('mongodb://localhost/my_database', {
3    useNewUrlParser: true,
4    useUnifiedTopology: true,
5    useFindAndModify: false,
6    useCreateIndex: true
7  })
8  .then(()=> console.log('connect'))
9  .catch((error) => console.error(error));

1$ npm install mongoose --save

1const mongoose = require('mongoose');
2
3mongoose.connect('mongodb://localhost:27017/twitter', {
4    useNewUrlParser: true,
5    useUnifiedTopology: true
6});
7
8const db = mongoose.connection;
9
10db.on('error', console.error.bind(console, 'connection error:'));
11db.once('open', function () {
12    console.log("Database Connected !!!");
13});
14
15module.exports = db;