Mongoose Connection

Question

I read the quick start from the Mongoose website and I almost copy the code, but I cannot connect the MongoDB using Node.js.

var mongoose = require(\'mongoos         


        

Answer 1

Mongoose's default connection logic is deprecated as of 4.11.0. It is recommended to use the new connection logic:

• useMongoClient option
• native promise library

---

Here is the example from npm module: mongoose-connect-db

// Connection options
const defaultOptions = {
  // Use native promises (in driver)
  promiseLibrary: global.Promise,
  useMongoClient: true,
  // Write concern (Journal Acknowledged)
  w: 1,
  j: true
};

function connect (mongoose, dbURI, options = {}) {
  // Merge options with defaults
  const driverOptions = Object.assign(defaultOptions, options);

  // Use Promise from options (mongoose)
  mongoose.Promise = driverOptions.promiseLibrary;

  // Connect
  mongoose.connect(dbURI, driverOptions);

  // If the Node process ends, close the Mongoose connection
  process.on('SIGINT', () => {
    mongoose.connection.close(() => {
      process.exit(0);
    });
  });

  return mongoose.connection;
}