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MongoDB and Node.js

Norberto Leite
Norberto Leite

The document provides a comprehensive guide on how to build a web application using MongoDB and Node.js, highlighting key concepts such as event-driven architecture, CRUD operations, and MongoDB's flexible schema. It includes practical examples for setting up a project, managing various database operations, and employing different write concerns and read preferences. Additionally, it emphasizes the importance of the MongoDB Node.js driver and offers code snippets for connecting, inserting, updating, and deleting documents.

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MongoDB + Node.js Building first app with MongoDB and Node.js
2 Agenda MongoDB + Node.js Driver ODM's MEAN Stack Meteor
3 Ola, I'm Norberto! Norberto Leite Technical Evangelist Madrid, Spain @nleite norberto@mongodb.com http://www.mongodb.com/norberto
MongoDB Node.js
INFACT
MongoDB JavaScript
7 Few reasons why Flexible Agile Web Language
8 MongoDB + Javascript •  MongoDB Shell –  JS interperter •  MongoDB MapReduce –  Runs on top of V8 –  Map and Reduce functions are JS functions •  Native support for Node.js –  One of the most used Drivers out there! –  https://www.npmjs.com/package/mongodb
Node.js
10 2 Foundations Events Streams
11 2 Foundations •  Events / Event Loop –  Single Thread Applications –  No threads –  Events Emitter –  Event Queue –  Known Events •  Streams –  Read, Write, Both –  Unix Pipes –  We use it extensively!
Install
npm package $ npm install mongodb
Compatibility http://docs.mongodb.org/ecosystem/drivers/node-js/#compatibility
15 Compatibility w/ MongoDB
Initialize Project
package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init
package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init ... { "name": "firstappnodejs", "version": "0.0.1", "description": "Small demo webinar application", "main": "index.js", "scripts": { "test": "workitout" }, "repository": { "type": "git", "url": "git://github.com/nleite/firstappnodejs" }, "dependencies": { "mongodb": "~2.0" }, "keywords": [http://docs.mongodb.org/ecosystem/drivers/node-js/#compatibility "demo", "nodejs", "mongodb" ], "author": "Norberto Leite", "license": "Apache 2.0", "bugs": { "url": "https://github.com/nleite/firstappnodejs/issues" }, "homepage": "https://github.com/nleite/firstappnodejs"
package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init ... { "name": "firstappnodejs", "version": "0.0.1", "description": "Small demo webinar application", "main": "index.js", "scripts": { "test": "workitout" }, "repository": { "type": "git", "url": "git://github.com/nleite/firstappnodejs" }, "dependencies": { "mongodb": "~2.0" }, "keywords": [ "demo", "nodejs", "mongodb" ], "author": "Norberto Leite", "license": "Apache 2.0", "bugs": { "url": "https://github.com/nleite/firstappnodejs/issues" }, "homepage": "https://github.com/nleite/firstappnodejs"
Install our new firstappnodejs app! $ npm install > kerberos@0.0.10 install … … > bson@0.3.1 install > mongodb@2.0.28 node_modules/mongodb ├── readable-stream@1.0.31 (isarray@0.0.1, inherits@2.0.1, string_decoder@0.10.31, core-util-is@1.0.1) └── mongodb-core@1.1.25 (kerberos@0.0.10, bson@0.3.1) firstappnodejs/ $ ls node_modules package.json
Connect
boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb
boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb --auth --keyfile ~/n.pem https://www.mongodb.com/products/mongodb-enterprise-advanced
boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb --auth --keyfile ~/n.pem https://www.mongodb.com/products/mongodb-enterprise-advanced
var MongoClient = require('mongodb').MongoClient, assert = require('assert'); Connect
var MongoClient = require('mongodb').MongoClient, assert = require('assert'); //connection uri var uri = "mongodb://localhost:27017/firstapp" Connect
var MongoClient = require('mongodb').MongoClient, assert = require('assert'); //connection uri var uri = "mongodb://localhost:27017/firstapp" //connect to MongoDB MongoClient.connect(uri, function(err, db){ assert.equal(null, err); console.log("Connected correctly to server"); db.close(); }); Connect
28 Connection Pooling •  No traditional Pooling mechanism –  Single thread process •  Sockets to pipeline operations •  Failover –  Buffering up operations –  bufferMaxEntries –  numberOfRetries –  retryMiliSeconds http://mongodb.github.io/node-mongodb-native/2.0/api/Db.html
CRUD
var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Sweet! Talking to Server"); insertDocuments(db, function() { db.close(); }); }); Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Sweet! Talking to Server"); insertDocuments(db, function() { db.close(); }); }); Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Ok, I can now update!"); updateDocuments(db, function() { db.close(); }); }); Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
Remove MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Ok, I can now delete!"); removeDocuments(db, function() { db.close(); }); }); http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find
Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find
Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find
Flexibility
Schema Flexibility
Different Schemas var insertDifferentShapes = function(db, cb){ var doc1 = {"name": "Norberto", "talks": [ {"nodejs":10}, {"java":15}, "python":11]}; var doc2 = {"name": "Bryan", "webinars": 30}; var coll = db.collection("content") coll.insertMany( [doc1, doc2], function(err, result){ assert.equal(err, null); assert.equal(2, result.insertedCount); console.log("Sweet, inserted "+ result.insertedCount); cb(result); }); } http://docs.mongodb.org/manual/data-modeling/
Different Schemas var insertDifferentShapes = function(db, cb){ var doc1 = {"name": "Norberto", "talks": [ {"nodejs":10}, {"java":15}, "python":11]}; var doc2 = {"name": "Bryan", "webinars": 30}; var coll = db.collection("content") coll.insertMany( [doc1, doc2], function(err, result){ assert.equal(err, null); assert.equal(2, result.insertedCount); console.log("Sweet, inserted "+ result.insertedCount); cb(result); }); } http://docs.mongodb.org/manual/data-modeling/
WriteConcerns
WriteConcern w:1
WriteConcern w:2
WriteConcern j:true
Different WriteConcerns var insertSuperImportant = function(db, cb){ var customer = {"name": "Manny Delgado", "age": 14}; var coll = db.collection("customers"); var writeConcern = {"w": "majority"}; col.insertOne( customer, writeConcern, function(err, result){ assert.equal(err, null); assert.equal(1, result.insertedCount); console.log("Inserted super important record"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/WriteConcernError.html
Different WriteConcerns var insertSuperImportant = function(db, cb){ var customer = {"name": "Manny Delgado", "age": 14}; var coll = db.collection("customers"); var writeConcern = {"w": "majority"}; col.insertOne( customer, writeConcern, function(err, result){ assert.equal(err, null); assert.equal(1, result.insertedCount); console.log("Inserted super important record"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/WriteConcernError.html
Read Preference
59 Read Preference •  Read from Primary (default) ReadPreference.PRIMARY •  Read from Primary Preferably ReadPreference.PRIMARY_PREFERRED •  Read from Secondary ReadPreference.SECONDARY •  Read from Secondary Preferably ReadPreference.SECONDARY_PREFERRED •  Read from Nearest Node ReadPreference.NEAREST http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {ReadPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {ReadPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {readPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
Aggregation
Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$match:{"age": $gt: 18}}, {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, {$project:{"ID": "$_id", "average": "$avg_age" }} ]; var cursor = coll.aggregate(pipeline); var coll = db.collection("users"); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); });} http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
ODM's
Mongoose
70 Mongoose •  Schema Validation •  Casting •  Business Logic Wrapper •  http://mongoosejs.com/
Simple Mongoose var mongoose = require('mongoose'), assert = require('assert') var Schema = mongoose.Schema; //define a schema var userSchema = new Schema({ name: String, age: Number}) //create static members userSchema.statics.findByName = function( name, cb){ return this.find( {"name": name}, cb); } …
Simple Mongoose … //generate a model var User = mongoose.model('User', userSchema); //initiate the new user, validates the given arguments var u1 = User({name:"Many Delgado", age:14}); //just save it u1.save(function(err){ assert.equal(null, err); });
73 Other Projects Project Repository MongoSkin https://github.com/kissjs/node-mongoskin Mongolia https://github.com/masylum/mongolia Mongojs https://github.com/mafintosh/mongojs MongoSmash https://github.com/bengl/mongosmash
MEAN Stack
75 MEAN Stack •  MongoDB •  Express.js •  Angular JS •  Node.js
Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.
AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop
Building your first app with MongoDB: Creating a RESTAPI using the MEAN Stack https://www.mongodb.com/blog/post/building- your-first-application-mongodb-creating-rest- api-using-mean-stack-part-1
Meteor
Meteor is a complete open source platform for building web and mobile apps in pure JavaScript.
81 Meteor •  Responsiveness •  Reactiveness •  Multiplatform •  Unified Package System •  Hot Deploys https://www.meteor.com/try
METEOR: Build IOS andAndroidApps that are a delight to use http://www.mongodb.com/blog/post/meteor- build-ios-and-android-apps-are-delight-use
Recap
84 What we talked about today… •  Node.js is a very productive language –  Our driver is highly adopted –  Updated –  Fully compatible •  CRUD Operations –  Insert, Update, Remove, Delete •  Write Concerns –  Flexible to write •  Read Preferences –  Flexible to read •  Aggregation Framework –  Analytics at your fingertips
85 Large Ecosystem •  Mongoose •  Mean Stack •  Meteor •  Many other projects
86 Where to next? •  Questions on the driver: –  https://groups.google.com/forum/#!forum/node-mongodb-native •  Issues: –  https://jira.mongodb.org/browse/NODE/? selectedTab=com.atlassian.jira.jira-projects-plugin:summary- panel •  Tutorial: –  http://mongodb.github.io/node-mongodb-native/2.0/ •  Todays code: –  https://github.com/nleite/firstappnodejs •  Other: –  http://www.mongodb.com/norberto
87 For More Information Resource Location Case Studies mongodb.com/customers Presentations mongodb.com/presentations Free Online Training education.mongodb.com Webinars and Events mongodb.com/events Documentation docs.mongodb.org MongoDB Downloads mongodb.com/download Additional Info info@mongodb.com Blog blog.mongodb.com
88 Register now: mongodbworld.com! ! Use Code NorbertoLeite for additional 25% Off! *Come as a group of 3 or more – Save another 25%!
http://cl.jroo.me/z3/v/D/C/e/a.baa-Too-many-bicycles-on-the-van.jpg Questions? @nleite norberto@mongodb.com http://www.mongodb.com/norberto
MongoDB and Node.js

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MongoDB and Node.js

  • 1. MongoDB + Node.js Building first app with MongoDB and Node.js
  • 3. 3 Ola, I'm Norberto! Norberto Leite Technical Evangelist Madrid, Spain @nleite [email protected] http://www.mongodb.com/norberto
  • 7. 7 Few reasons why Flexible Agile Web Language
  • 8. 8 MongoDB + Javascript •  MongoDB Shell –  JS interperter •  MongoDB MapReduce –  Runs on top of V8 –  Map and Reduce functions are JS functions •  Native support for Node.js –  One of the most used Drivers out there! –  https://www.npmjs.com/package/mongodb
  • 11. 11 2 Foundations •  Events / Event Loop –  Single Thread Applications –  No threads –  Events Emitter –  Event Queue –  Known Events •  Streams –  Read, Write, Both –  Unix Pipes –  We use it extensively!
  • 13. npm package $ npm install mongodb
  • 17. package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init
  • 18. package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init ... { "name": "firstappnodejs", "version": "0.0.1", "description": "Small demo webinar application", "main": "index.js", "scripts": { "test": "workitout" }, "repository": { "type": "git", "url": "git://github.com/nleite/firstappnodejs" }, "dependencies": { "mongodb": "~2.0" }, "keywords": [http://docs.mongodb.org/ecosystem/drivers/node-js/#compatibility "demo", "nodejs", "mongodb" ], "author": "Norberto Leite", "license": "Apache 2.0", "bugs": { "url": "https://github.com/nleite/firstappnodejs/issues" }, "homepage": "https://github.com/nleite/firstappnodejs"
  • 19. package.json file $ mkdir firstappnodejs $ cd firstappnodejs $ npm init ... { "name": "firstappnodejs", "version": "0.0.1", "description": "Small demo webinar application", "main": "index.js", "scripts": { "test": "workitout" }, "repository": { "type": "git", "url": "git://github.com/nleite/firstappnodejs" }, "dependencies": { "mongodb": "~2.0" }, "keywords": [ "demo", "nodejs", "mongodb" ], "author": "Norberto Leite", "license": "Apache 2.0", "bugs": { "url": "https://github.com/nleite/firstappnodejs/issues" }, "homepage": "https://github.com/nleite/firstappnodejs"
  • 20. Install our new firstappnodejs app! $ npm install > [email protected] install … … > [email protected] install > [email protected] node_modules/mongodb ├── [email protected] ([email protected], [email protected], [email protected], [email protected]) └── [email protected] ([email protected], [email protected]) firstappnodejs/ $ ls node_modules package.json
  • 22. boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb
  • 23. boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb --auth --keyfile ~/n.pem https://www.mongodb.com/products/mongodb-enterprise-advanced
  • 24. boot up MongoDB Server $ mkdir ~/firstappdb $ mongod --dbpath ~/firstappdb --auth --keyfile ~/n.pem https://www.mongodb.com/products/mongodb-enterprise-advanced
  • 25. var MongoClient = require('mongodb').MongoClient, assert = require('assert'); Connect
  • 26. var MongoClient = require('mongodb').MongoClient, assert = require('assert'); //connection uri var uri = "mongodb://localhost:27017/firstapp" Connect
  • 27. var MongoClient = require('mongodb').MongoClient, assert = require('assert'); //connection uri var uri = "mongodb://localhost:27017/firstapp" //connect to MongoDB MongoClient.connect(uri, function(err, db){ assert.equal(null, err); console.log("Connected correctly to server"); db.close(); }); Connect
  • 28. 28 Connection Pooling •  No traditional Pooling mechanism –  Single thread process •  Sockets to pipeline operations •  Failover –  Buffering up operations –  bufferMaxEntries –  numberOfRetries –  retryMiliSeconds http://mongodb.github.io/node-mongodb-native/2.0/api/Db.html
  • 29. CRUD
  • 30. var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
  • 31. var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
  • 32. var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
  • 33. var insertDocuments = function(db, cb){ //we don't need to explicitly create a collection var collection = db.collection('myCollection'); collection.insertMany([ {"mongodb": "is just awesome"}, {"nodejs": "so awesome"} ], function(err, result){ assert.equal(null, err); //inserted 2 documents assert.equal(2, result.insertedCount); //invoke callback cb(result); }); } Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
  • 34. MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Sweet! Talking to Server"); insertDocuments(db, function() { db.close(); }); }); Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
  • 35. MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Sweet! Talking to Server"); insertDocuments(db, function() { db.close(); }); }); Insert http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#insert
  • 36. var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
  • 37. var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
  • 38. var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
  • 39. var updateDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.updateOne( {"mongodb": "is just awesome"}, {$set: {"users": ["nleite"]}}, function( err, result){ assert.equal(null, err); assert.equal(1, result.modifiedCount); console.log("Cool, just updated"); cb(result); }); } Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
  • 40. MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Ok, I can now update!"); updateDocuments(db, function() { db.close(); }); }); Update http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#update
  • 41. Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
  • 42. Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
  • 43. Remove var removeDocument = function(db, cb){ var collection = db.collection("myCollection"); collection.deleteOne( {"users": "nleite"}, function( err, result){ assert.equal(null, err); assert.equal(1, result.deletedCount); console.log("purged the @nleite contaminated data!"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
  • 44. Remove MongoClient.connect(uri, function(err, db) { assert.equal(null, err); console.log("Ok, I can now delete!"); removeDocuments(db, function() { db.close(); }); }); http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#remove
  • 45. Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find
  • 46. Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find
  • 47. Find var findAllDocuments = function(db, cb){ var collection = db.collection('myDocuments'); //or collection.find() collection.find({}).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("Gotcha! found "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#find
  • 50. Different Schemas var insertDifferentShapes = function(db, cb){ var doc1 = {"name": "Norberto", "talks": [ {"nodejs":10}, {"java":15}, "python":11]}; var doc2 = {"name": "Bryan", "webinars": 30}; var coll = db.collection("content") coll.insertMany( [doc1, doc2], function(err, result){ assert.equal(err, null); assert.equal(2, result.insertedCount); console.log("Sweet, inserted "+ result.insertedCount); cb(result); }); } http://docs.mongodb.org/manual/data-modeling/
  • 51. Different Schemas var insertDifferentShapes = function(db, cb){ var doc1 = {"name": "Norberto", "talks": [ {"nodejs":10}, {"java":15}, "python":11]}; var doc2 = {"name": "Bryan", "webinars": 30}; var coll = db.collection("content") coll.insertMany( [doc1, doc2], function(err, result){ assert.equal(err, null); assert.equal(2, result.insertedCount); console.log("Sweet, inserted "+ result.insertedCount); cb(result); }); } http://docs.mongodb.org/manual/data-modeling/
  • 56. Different WriteConcerns var insertSuperImportant = function(db, cb){ var customer = {"name": "Manny Delgado", "age": 14}; var coll = db.collection("customers"); var writeConcern = {"w": "majority"}; col.insertOne( customer, writeConcern, function(err, result){ assert.equal(err, null); assert.equal(1, result.insertedCount); console.log("Inserted super important record"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/WriteConcernError.html
  • 57. Different WriteConcerns var insertSuperImportant = function(db, cb){ var customer = {"name": "Manny Delgado", "age": 14}; var coll = db.collection("customers"); var writeConcern = {"w": "majority"}; col.insertOne( customer, writeConcern, function(err, result){ assert.equal(err, null); assert.equal(1, result.insertedCount); console.log("Inserted super important record"); cb(result); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/WriteConcernError.html
  • 59. 59 Read Preference •  Read from Primary (default) ReadPreference.PRIMARY •  Read from Primary Preferably ReadPreference.PRIMARY_PREFERRED •  Read from Secondary ReadPreference.SECONDARY •  Read from Secondary Preferably ReadPreference.SECONDARY_PREFERRED •  Read from Nearest Node ReadPreference.NEAREST http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
  • 60. Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {ReadPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
  • 61. Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {ReadPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
  • 62. Read From Nearest var readNearestWaterMelonColor = function(db, cb){ var rp = ReadPreference.NEAREST; var coll = db.collection("products", {readPreference:rp}); var query = {"color": "water melon green"}; collection.find(query).toArray(function(err, docs){ assert.equal(err, null); assert.equal(1, docs.length); console.log("So many products: "+ docs.length); console.dir(docs); cb(docs); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/ReadPreference.html
  • 64. Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
  • 65. Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
  • 66. Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, ]; var coll = db.collection("users"); var cursor = coll.aggregate(pipeline); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); }); } http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
  • 67. Aggregation var aggregateAvgAgeGender = function( db, cb){ //{age:XX, name:"user name", gender: "M/F"} var pipeline = [ {$match:{"age": $gt: 18}}, {$group: { "_id": "$gender", avg_age: {$avg: "$age"}}}, {$project:{"ID": "$_id", "average": "$avg_age" }} ]; var cursor = coll.aggregate(pipeline); var coll = db.collection("users"); cursor.forEach( function(x){ console.log("Gender " + x._id + " age average " + x.avg_age) }, function(x) { cb(cursor); });} http://mongodb.github.io/node-mongodb-native/2.0/api/Collection.html#aggregate
  • 68. ODM's
  • 70. 70 Mongoose •  Schema Validation •  Casting •  Business Logic Wrapper •  http://mongoosejs.com/
  • 71. Simple Mongoose var mongoose = require('mongoose'), assert = require('assert') var Schema = mongoose.Schema; //define a schema var userSchema = new Schema({ name: String, age: Number}) //create static members userSchema.statics.findByName = function( name, cb){ return this.find( {"name": name}, cb); } …
  • 72. Simple Mongoose … //generate a model var User = mongoose.model('User', userSchema); //initiate the new user, validates the given arguments var u1 = User({name:"Many Delgado", age:14}); //just save it u1.save(function(err){ assert.equal(null, err); });
  • 73. 73 Other Projects Project Repository MongoSkin https://github.com/kissjs/node-mongoskin Mongolia https://github.com/masylum/mongolia Mongojs https://github.com/mafintosh/mongojs MongoSmash https://github.com/bengl/mongosmash
  • 75. 75 MEAN Stack •  MongoDB •  Express.js •  Angular JS •  Node.js
  • 76. Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.
  • 77. AngularJS lets you extend HTML vocabulary for your application. The resulting environment is extraordinarily expressive, readable, and quick to develop
  • 78. Building your first app with MongoDB: Creating a RESTAPI using the MEAN Stack https://www.mongodb.com/blog/post/building- your-first-application-mongodb-creating-rest- api-using-mean-stack-part-1
  • 80. Meteor is a complete open source platform for building web and mobile apps in pure JavaScript.
  • 81. 81 Meteor •  Responsiveness •  Reactiveness •  Multiplatform •  Unified Package System •  Hot Deploys https://www.meteor.com/try
  • 82. METEOR: Build IOS andAndroidApps that are a delight to use http://www.mongodb.com/blog/post/meteor- build-ios-and-android-apps-are-delight-use
  • 83. Recap
  • 84. 84 What we talked about today… •  Node.js is a very productive language –  Our driver is highly adopted –  Updated –  Fully compatible •  CRUD Operations –  Insert, Update, Remove, Delete •  Write Concerns –  Flexible to write •  Read Preferences –  Flexible to read •  Aggregation Framework –  Analytics at your fingertips
  • 85. 85 Large Ecosystem •  Mongoose •  Mean Stack •  Meteor •  Many other projects
  • 86. 86 Where to next? •  Questions on the driver: –  https://groups.google.com/forum/#!forum/node-mongodb-native •  Issues: –  https://jira.mongodb.org/browse/NODE/? selectedTab=com.atlassian.jira.jira-projects-plugin:summary- panel •  Tutorial: –  http://mongodb.github.io/node-mongodb-native/2.0/ •  Todays code: –  https://github.com/nleite/firstappnodejs •  Other: –  http://www.mongodb.com/norberto
  • 87. 87 For More Information Resource Location Case Studies mongodb.com/customers Presentations mongodb.com/presentations Free Online Training education.mongodb.com Webinars and Events mongodb.com/events Documentation docs.mongodb.org MongoDB Downloads mongodb.com/download Additional Info [email protected] Blog blog.mongodb.com
  • 88. 88 Register now: mongodbworld.com! ! Use Code NorbertoLeite for additional 25% Off! *Come as a group of 3 or more – Save another 25%!