Nodejs Operation MongoDB Simple Example

Database operations

Mongo

Use TEST3;

Db.users.insert ({"Name": "AAA", "Email": "[email protected]"});

Nodejs Code Writing

Create a new test3 directory and edit the following file:

Package.json

{    "name": "Application-name",    "version": "0.0.1",    true,    "Scripts": {        "start": "Node App.js"    },    "dependencies": {        " Express ":" 3.4.4 ",        " Jade ":" * ",        " MongoDB ":" * ",        " Monk ":" * "     }}

App.js

varExpress = require (' Express ');varRoutes = require ('./routes '));varuser = require ('./routes/user '));varHTTP = require (' http ');varPath = require (' path ');varMONGO = require (' MongoDB ');varMonk = require (' Monk '));//vardb = Monk (' Localhost:27017/test3 ');//varApp =Express ();//All environmentsApp.set (' Port ', Process.env.PORT | | 3000); App.set (' Views ', Path.join (__dirname, ' views '))); App.set (' View engine ', ' Jade '); App.use (Express.logger (' Dev ') ; App.use (Express.bodyparser ()); App.use (Express.methodoverride ()); App.use (App.router); App.use ( Express.static (Path.join (__dirname,' Public ')));//Development Onlyif(' development ' = = = = App.get (' env ')) {app.use (Express.errorhandler ());}//App.get ('/', Routes.index); App.get ('/users ', user.list);//Create serverHttp.createserver (APP). Listen (App.get (' Port '),function() {Console.log (' Express server listening on port ' + app.get (' Port '));});//Hello WorldApp.get ('/hello ', Routes.hello);//User ListApp.get ('/userlist ', Routes.userlist (db));//New UserApp.get ('/newuser ', routes.newuser);//Add UserApp.post ('/adduser ', Routes.adduser (db));

Routes/index.js

Exports.index =function(req, res) {Res.render (' Index ', {title: ' Express '});} Exports.hello=function(req, res) {Res.render (' Hello ', {title: ' Hello, World '});} Exports.userlist=function(db) {return function(req, res) {varCollection = Db.get (' users '); Collection.find ({}, {},function(E, Docs) {Res.render (' UserList ', {                ' UserList ': Docs});    }); };} Exports.newuser=function(req, res) {Res.render (' NewUser ', {title: ' Add New User '});} Exports.adduser=function(db) {return function(req, res) {varUsername =Req.body.username; varUserEmail =Req.body.useremail; varCollection = Db.get (' users '); Collection.insert ({"Name": Username,"Email": UserEmail},function(err, doc) {if(Err) {Res.send (' There is a problem adding the information to the DB. '); } Else{res.location (' UserList '); Res.redirect (' UserList ');    }        }); };}

Routes/user.js

function (req, res) {    res.send (' respond with a resource ');}

Views/index.jade

extends Layoutblock content    h1= title    p Welcome to #{title}

Views/hello.jade

extends Layoutblock content    h1= title    p Welcome to #{title}

Views/userlist.jade

extends Layoutblock content    H1.        User List    ul        in  userlist            li                A (href= "Mailto:#{user.email}") = User.Name

Views/newuser.jade

extends Layoutblock content    h1= title    form#formadduser (Name= "AddUser", method= "POST", action= "/adduser")        input#inputusername (Type= "text", placeholder= "username", name= "username")        input#inputuseremail (Type= "text", placeholder= "UserEmail", name= "UserEmail")        Button#btnsubmit ( Type= "Submit") submit

Views/layout.jade

doctype htmlhtml    head        title= title        link (rel= ' stylesheet ', href= '/stylesheets /style.css ')    body        block content

Software run

CD Test3

NPM Install

Node App.js

Nodejs Operation MongoDB Simple Example