how to use mongodb and mongoose in node js code example

Example 1: 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

Example 2: node js + mongoose

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

Example 3: node js + mongoose

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
  // we're connected!
});

Example 4: setup mongoose locally

mongoose.connect('mongodb://username:password@host:port/database?options...', {useNewUrlParser: true});