express+jade+bootstrap+mongdb simple CRUD test

１：当前环境

y@y:~$ node --version && express -V && mongo --version
v0.12.2
4.9.0
MongoDB shell version: 2.4.9
y@y:~$ 

２：新建工程目录

y@y:express-test$ express demo01
y@y:express-test$ cd demo01 && npm install

使用bower下载bootstrap：
y@y:public$ bower install bootstrap

在package.json中加入mongodb依赖：

{
  "name": "demo01",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "start": "node ./bin/www"
  },
  "dependencies": {
    "express": "~4.9.0",
    "body-parser": "~1.8.1",
    "cookie-parser": "~1.3.3",
    "morgan": "~1.3.0",
    "serve-favicon": "~2.1.3",
    "debug": "~2.0.0",
    "jade": "~1.6.0",
    "mongodb":  "~2.0.33",
    "monk": "~1.0.1"
  }
}

再次执行：npm install

３：工程代码结构

（１）app.js

// 加载依赖库
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

//mongodb config
//var mongo = require('mongodb');
var monk = require('monk');
var db = monk('localhost:27017/test');


// 加载路由控制
var routes = require('./routes/index');
var users = require('./routes/users');

// 创建项目实例
var app = express();

// 定义jade模板引擎和模板文件位置
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// 定义网站图标
//app.use(favicon(__dirname + '/public/favicon.ico'));

// 定义日志和输出级别
app.use(logger('dev'));

// 定义数据解析器
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// 定义cookie解析器
app.use(cookieParser());

// 定义静态文件目录
app.use(express.static(path.join(__dirname, 'public')));

//让db访问路由
app.use(function(req,res,next){
    req.db = db;
    next();
});

// 匹配路径和路由
app.use('/', routes);
app.use('/user', users);


// 404错误处理
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});


// 开发环境，500错误处理和错误堆栈跟踪
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// 生产环境，500错误处理
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

// 输出模型app
module.exports = app;

（２）路由users.js

var express = require('express');
var router = express.Router();

/**
 * 用户列表
 * http://127.0.0.1:3000/user/list
 */
router.get('/list', function(req, res) {
  var db = req.db;

  db.get('user').find({},{},function(err,docs){
    if(err){
      errHandler(res,err);
    }else{
      res.render('users/list',{
        title: '用户列表',
        userlist: docs
      });
    }
  });
});

/**
 * 添加新用户操作界面
 * http://127.0.0.1:3000/user/add
 */
router.get('/add', function(req, res) {
  res.render('users/add');
});

/**
 * 修改用户信息界面
 */
router.get('/edit/:id', function(req,res){
  var db = req.db;
  db.get('user').findOne({_id:req.params.id},{},function(err,doc){
    if(err){
      errHandler(res,err);
    }else{
      res.render('users/edit', {user: doc});
    }
  });
});

/**
 * 修改用户信息
 */
router.post('/update', function(req,res){
  var db = req.db;

  var _id = req.body._id;
  var name = req.body.name;
  var email = req.body.email;

  db.get('user').updateById(_id,
      {'name':name,'email':email},
      function(err,doc){
        if(err){
          errHandler(res,err);
        }else{
          res.redirect('list');
        }
      });
});

/**
 * 保存新添加的用户信息
 */
router.post('/save', function(req,res){
  var db = req.db;

  var name = req.body.name;
  var email = req.body.email;

  db.get('user').insert(
      {
        'name': name,
        'email': email
      },
      function(err,doc){
        if(err){
          errHandler(res,err);
        }else{
          res.redirect('list');
        }
      }
  );
});

/**
 * 根据_id删除
 */
router.get('/delete/:id', function(req,res){
  var db = req.db;

  db.get('user').remove({_id:req.params.id},function(err,doc){
    if(err){
      errHandler(res,err);
    }else{
      res.render('info',{info:'删除成功!',url:'http://127.0.0.1:3000/user/list'});
    }
  });
});

/**
 *  错误处理
 * @param res
 * @param err
 */
function errHandler(res,err){
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: err
  });
};


module.exports = router;

（３）users/list.jade

extends ../layout

block content
   div.container
      h3.text-center.text-primary 用户列表
      hr
      a.btn.btn-primary.btn-sm(href='add') 增加
      table.table.table-bordered.table-condensed.table-hover
         thead
            tr.bg-info
               th.text-center.col-xs-4 用户名
               th.text-center.col-xs-5 邮箱
               th.text-center.col-xs-3 操作
         tbody
            each user, i in userlist
               tr.text-center
                  td= user.name
                  td= user.email
                  td
                     a.btn.btn-danger.btn-sm.margin-left(href='delete/'+user._id) 删除
                     a.btn.btn-warning.btn-sm.margin-left(href='edit/'+user._id) 修改

（４）users/add.jade

extends ../layout

block content
    div.container
        h3.text-center.text-primary 添加用户
        hr
        form(name="addUserForm",method="post",action="/user/save")
            div.form-group
                label(for='name') 用户名
                input#name.form-control(name='name',placeholder='用户名')
            div.form-group
                label(for='email') 邮箱
                input#email.form-control(name='email',type='email',placeholder='邮箱地址')
            div.text-center
                button.btn.btn-primary.margin-right(type='submit') 保存
                button.btn.btn-default.margin-left(type='reset') 重置

（５）users/edit.jade

extends ../layout
block content
    div.container
        h3.text-center.text-primary 修改用户信息
        hr
        form(name="editUserForm",method="post",action="/user/update")
            input(type='hidden',name='_id',value=user._id)
            div.form-group
                label(for='name') 用户名
                input#name.form-control(name='name',placeholder='用户名', value=user.name)
            div.form-group
                label(for='email') 邮箱
                input#email.form-control(name='email',type='email',placeholder='邮箱地址', value=user.email)
            div.text-center
                button.btn.btn-primary.margin-right(type='submit') 保存
                button.btn.btn-default.margin-left(type='reset') 重置

（６）info.jade

extends layout
block content
   div.container.text-center
      h1.text-warning=info
      a.btn.btn-primary(href=url) 返回