Elegant use of MongoDB instances from scratch

Basic connection

First, create Express project Testmon

Express Testmon

Second, streamline App.js

var express = Require ("Express"); var app = Express (); App.get (function(req, res) {     res.send (' Add one piece of data at a time ') ; }); var server = App.listen (,function() {    console.log ("Please visit in Browser: http://localhost : (");});

Three: Enter the engineering directory to install Mongoose and introduce dependencies:

NPM Install--save Mongoose

Iv. Modification of App.js

varExpress = Require ("Express");varApp =Express (); App.get (‘/‘,function(req, res) {Res.send (' Hello, tinyphp '); });varServer = App.listen (3000,function() {Console.log ("Please visit in Browser: http://localhost:3000");});//Introducing the Mongoose modulevarMongoose = require (' Mongoose '));//Create a database connectionvarDb=mongoose.connect (' Mongodb://localhost:27017/test ');//Check if the connection is successfulDb.connection.on ("Error",function(Error) {Console.log ("Database connection failed:" +( error);}); Db.connection.on ("Open",function(Error) {Console.log ("++++++ Database successfully ++++++");});/*****schema Use * * * **///define the Kitty propertyvarKittyschema =Mongoose. Schema ({name:string});//publish the schema as model, the first parameter is a collection namevarKittymodel = Mongoose.model (' Kitty ', Kittyschema);//create a kitty entity with modulevarKittyentity =NewKittymodel ({name: ' tinyphp99 ') });//Save DataKittyentity.save (function(err) {if(Err) {Console.log (err); } Else{Console.log (' successfully inserting data '); }});/************/

Open another CMD window, first query the data once, then restart the project, and then query the data discovery data successfully added

Separation and transformation

Let's convert it to a visit Http://localhost:3000/add automatically add data, ideas

Config.js Database configuration information

module.exports={    MongoDB:"Mongodb://localhost:27017/test"}

Mongoose.js Database Connection File

//Introducing the Mongoose modulevarMongoose = require (' Mongoose '));varConfig=require ('./config.js ')); Module.exports=function(){    //Create a database connectionvardb=Mongoose.connect (CONFIG.MONGODB);//Check if the connection is successfulDb.connection.on ("Error",function(Error) {Console.log ("Database connection failed:" +( error);}); Db.connection.on ("Open",function(Error) {Console.log ("++++++ Database successfully ++++++");}); Require (‘.. /models/kitty.model.js ');returnDB;}

Kitty.model.js export model for generating entities

var mongoose =require (' Mongoose '); /* ****schema Use * * * * */ // define the Kitty property var kittyschema = Mongoose. Schema ({    name:string  }); Mongoose.model (' Kitty ', Kittyschema);

App.js

var express = Require ("Express"); var mongoose = require ('./config/mongoose.js 'var db=Mongoose (); var app = Express (); var add=require ('./routes/add '); App.use ('/add ', add); var server = App.listen (,function() {    console.log ("Please visit in Browser:/http localhost:3000 ");});

Add.js Control Access once http://localhost:3000/add insert data once

varExpress = require (' Express ');varRouter =Express. Router ();varMongoose =require (' Mongoose '));varKittymodel=mongoose.model (' Kitty '));/*GET home page.*/Router.get (‘/‘,function(req, res, next) {Res.send (' Add another piece of data ');//publish the schema as model, the first parameter is a collection namevarKittymodel = Mongoose.model (' Kitty ');//create a kitty entity with modulevarKittyentity =NewKittymodel ({name: ' new ') });//Save DataKittyentity.save (function(err) {if(Err) {Console.log (err); } Else{Console.log (' successfully inserting data '); }});}); Module.exports= Router;

In the route because of the use of Kittymodel so introduced to the mongoose initialization, otherwise it will prompt the error "Schema hasn ' t been registered ...", you put the above in the order of the test more profound Oh ~

Warm tip: More testing, you may wish to use Db.table.drop () to remove the entire collection OH

Related articles:

Install Express and create a project

Windows Platform Installation MongoDB

Elegant use of MongoDB instances from scratch