According to the changelog for 3.0 you now get a client object containing the database object instead:
MongoClient.connect('mongodb://localhost:27017', (err, client) => {
// Client returned
var db = client.db('mytestingdb');
});The close() method has also been moved to the client. The code in the question can therefore be translated to:
MongoClient.connect('mongodb://localhost', function (err, client) {
if (err) throw err;
var db = client.db('mytestingdb');
db.collection('customers').findOne({}, function (findErr, result) {
if (findErr) throw findErr;
console.log(result.name);
client.close();
});
}); -----------------------------------------------------------------------------------------------------------------------------------------------------------------
const {MongoClient} = require("mongodb");
const url = "mongodb://localhost:27017/";
const findDocuments = (client, callback) => {
var db = client.db('learning_mongo');
var collection = db.collection('tours');
collection.find({"tourPackage": "Snowboard Cali"}).toArray((err, docs) => {
console.log(docs);
callback();
});
}
MongoClient.connect(url,{ useNewUrlParser: true }, (err, client) => {
console.log("MongoDB: you now get a client object containing the database object");
findDocuments(client, () => {
client.close();
})
// db.close();
})
terminal 1: mongod
terminal 2: node index.js
terminal 3: http http://localhost:8080/api/tours
