Raspberry Pi: MongoDB with Node.js

Unfortunately, this script still works great on the web site, and It woked before on Raspberry Pi, but now…

Source: Node.js MongoDB Get Started

Create a file (by default index.js):

var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/mydb";

// // does nothing
// MongoClient.connect(url, function(err, db) {
//   if (err) throw err;
//   console.log("Database created!");
//   db.close();
// });

// does nothing
// MongoClient.connect(url, function(err, db) {
//     if (err) throw err;
//     var dbo = db.db("mydb");
//     dbo.createCollection("customers", function(err, res) {
//       if (err) throw err;
//       console.log("Collection created!");
//       db.close();
//     });
//   });

// remove all previously inserted documents
MongoClient.connect(url, function(err, db) {
  if (err) throw err;
  var dbo = db.db("mydb");
  dbo.collection("customers").deleteMany(function(err, res) {
    if (err) throw err;
    console.log("Collection emptied :-)!");
    db.close();
  });
});

// insert single document
  MongoClient.connect(url, function(err, db) {
    if (err) throw err;
    var dbo = db.db("mydb");
    var myobj = { name: "some name", address: "somebody's address" };
    dbo.collection("customers").insertOne(myobj, function(err, res) {
      if (err) throw err;
      console.log(`${res.insertedCount} document(s) inserted`);
      db.close();
    });
  });

  // insert multiple documents
MongoClient.connect(url, function(err, db) {
  if (err) throw err;
  var dbo = db.db("mydb");
  var myobj = [
    { name: "local business", address: "Lehigh Acres" },
    { name: "family", address: "Fort Myers" },
    { name: "friends", address: "Naples, FL" },
  ];
  dbo.collection("customers").insertMany(myobj, function(err, res) {
    if (err) throw err;
    console.log(`${res.insertedCount} document(s) inserted`);
    db.close();
  });
});

// show all records from the collection
MongoClient.connect(url, function(err, db) {
  if (err) throw err;
  var dbo = db.db("mydb");
  dbo.collection("customers").find().toArray(function(err, result) {
    if (err) throw err;
    console.log('-'.repeat(80));
    console.log(result);
    db.close();
  });
});

// conditional query
 MongoClient.connect(url, function(err, db) {
    if (err) throw err;
    var dbo = db.db("mydb");
    var query = { address: "Lehigh Acres" };
    dbo.collection("customers").find(query).toArray(function(err, result) {
      if (err) throw err;
      console.log('-'.repeat(80));
      console.log(result);
      db.close();
    });
  });

For Visual Code, go to terminal Ctrl+`, run “node .” and you should see add documents/records to the MongoDB. Some warning could be displayed 🙁