Nodejs+Mongo+WebAPI

Nodejs+Mongo+WebAPI集成

1.【 目录】：

|- models/bear.js

|- node_modules/

　　　　　　　　|- express

　　　　　　　　|- mongoose

　　　　　　　　|- body-parser

|- Server.js

|- package.json

2. 【代码】：

//Server.js

// server.js

// base setup
// ===========================================================

// call the package we need
var express     = require('express');    // call expreess
var app            = express();            // define our app using express
var bodyParser    = require('body-parser');

// mongoose setup
var mongoose    = require('mongoose');
mongoose.connect('mongodb://localhost:27017/myDatabase')    // connect to database 'myDatabase'

// models setup
var Bear = require('./models/bear')

// configure app to use bodyParser()
// this will let us get the data from a POST
app.use( bodyParser.urlencoded({ extended: true}));
app.use( bodyParser.json());

var port = process.env.PORT || 3000;



// routes for our API
// ==============================================================
var router = express.Router();


// 1. middle ware 
router.use( function(req, res, next){
    // do logging
    console.log('Something is happening.');
    next();
});

// 2. test route to make sure everything is work 
router.get('/', function(req, res){
    res.json( { message: 'Horray! Welcome to our api!'});
});

// 3. routes end in: /bears
router.route('/bears')

    // 3-1. create a bear (accessed at POST http://localhost:3000/api/bears)
    .post( function(req, res){        
        var newBear = new Bear();        // create a new instance of the Bear model
        newBear.name = req.body.name;    // set the bears name ( comes from the request )
        
        // save the bear and check for errors
        newBear.save ( function(err){
            if(err)
                res.send(err);
            res.json({ message: 'Bear created!'});            
         });
    })
    
    // 3-2. get all the bears (accessed at GET http://localhost:3000/api/bears)
    .get( function(req, res){
        Bear.find( function(err, bears){
            if(err)
                res.send(err);
            res.json(bears);
        })
    } );  

// 4. routes end in: /bears/:bears_id
router.route('/bears/:bear_id')

    //4-1. get the bear with this id (accessed at GET http://localhost:3000/api/bears/:bear_id)
    .get(function(req, res){
        Bear.findById(req.params.bear_id, function(err, bear){
            if(err)
                res.send(err);
            res.json(bear);
        });
    })
    
    // 4-2. update the bear with this id (accessed at PUT http://localhost:3000/api/bears/:bear_id)
    .put(function(req, res){
        
        // use bear model to find the bear we want
        Bear.findById(req.params.bear_id, function(err, bear){
            if(err)
                res.send(err);
            bear.name = req.body.name; // update the bears info
            
            // save the bear
            bear.save(function(err){
                if(err)
                    res.send(err);
                res.json({message: 'Bear updated!'});
            });
        });
    })
    
    // 4-3. delete the bear with this id (accessed at DELETE http://localhost:3000/api/bears/:bear_id)
    .delete(function(req, res){
        Bear.remove(
            {
                _id: req.params.bear_id
            }, function(err, bear){
                if(err)
                    res.send(err);
                res.json({ message: 'Successfully deleted!'});
            }
        )
    });

// more routes for our API will happen here

// REGISTER OUR ROUTES

// all of our routes will be prefixed with /api
app.use('/api', router);


// start the server
// ==============================================
app.listen(port);
console.log('Magic happens on port : ' + port);

// models/bear.js

var mongoose    = require('mongoose');
var Schema        = mongoose.Schema;

var BearSchema    = new Schema( {
    name:    String
});

module.exports = mongoose.model('Bear', BearSchema);