MongoDB and Mongoose quick examples

Author: François Daoust

mongodb.js

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+var MongoClient = require('mongodb').MongoClient;
+
+MongoClient.connect('mongodb://127.0.0.1:27017/nodeintro', function (err, db) {
+  if (err) {
+    console.error('Oh no, connection troubles!', err);
+    return;
+  }
+
+  db.collection('testcol').insert({
+    nick: 'tidoust',
+    firstName: 'Francois',
+    lastName: 'Daoust'
+  }, function (err, result) {
+    if (err) {
+      console.error('Insertion failed', err);
+      process.exit(1);
+    }
+    console.log('Inserted', result);
+
+    db.collection('testcol').findOne({
+      nick: 'tidoust'
+    }, function (err, result) {
+      if (err) {
+        console.error('Could not read DB', err);
+        process.exit(1);
+      }
+      console.log('Found', result);
+
+      db.close(function (err) {
+        if (err) return console.error('WTF, no way to close the connection', err);
+        console.log('That\'s all folks!');
+      });
+    });
+  });
+});

mongoose.js

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+var mongoose = require('mongoose');
+var db = mongoose.createConnection('mongodb://localhost:27017/nodeintro');
+
+var userSchema = mongoose.Schema({
+  nick: String,
+  age: { type: Number, required: true }
+});
+
+userSchema.methods.sayHi = function () {
+  console.log(this.nick + ' says "Hi!"');
+};
+
+var User = db.model('User', userSchema);
+
+db.on('error', console.error.bind(console, 'connection error'));
+db.once('open', function callback() {
+  var user = new User({
+    nick: 'tidoust',
+    firstName: 'Francois',
+    lastName: 'Daoust'
+  });
+
+  user.save(function (err, user) {
+    if (err) return console.error('Oh no!');
+    user.sayHi();
+
+    console.log(user);
+
+    db.close();
+  });
+});