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 || ;

 // 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);