源码讲解 node+mongodb 建站攻略（一期）第二节

上一节，咱们完成了模拟数据，此次咱们来玩儿真正的数据库，mongodb。node

代码http://www.imlwj.com/download/nodejs/demo1.rarajax

首先给你们看看目录结构。mongodb

你们能够比对一下，跟第一节咱们加了那些内容。数据库

1，咱们新建文件夹schemas，新建文件movie.js，主要提供对数据模型，实例化，对数据的增删改查方法。express

var mongoose=require('mongoose');
var MovieSchema=new mongoose.Schema({
doctor:String,
title:String,
language:String,
summary:String,
flash:String,
poster:String,
year:Number,
meta:{
createAt:{
type:Date,
default:Date.now()
},
updateAt:{
type:Date,
default:Date.now()
}
}
});
MovieSchema.pre('save',function(next){
if(this.isNew){
this.meta.createAt=this.meta.updateAt=Date.now();
}else{
this.meta.updateAt=Date.now();
}
next();
});

MovieSchema.statics={
fetch:function(cb){
return this
.find({})
.sort('meta.updateAt')
.exec(cb);
},
findById:function(id,cb){
return this
.findOne({_id:id})
.exec(cb);
}
};

module.exports=MovieSchema;

2，咱们新建文件夹schemas，新建文件movie.js ，定义变量json

var mongoose=require('mongoose');
var MovieSchema=require('../schemas/movie');
var Movie=mongoose.model('Movie',MovieSchema);

module.exports=Movie;

3，准备工做作好了，开始页面上来操做数据了，仍是从入口文件开始app

var express = require('express');
var path = require('path');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var _ = require('underscore');//提供新的支持underscore
var Movie = require("./models/movie");
var port = process.PORT || 3000;
var app = express();

mongoose.connect("mongodb://localhost/demo1");

app.set('views', './views/pages');
app.set('view engine', 'jade');

// app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname,'bower_components')));
app.use(bodyParser.urlencoded({
extended: true
}));
app.locals.moment = require('moment');

app.listen(port);

console.log('demo1 started on port ' + port);

//index page
app.get('/', function(req, res) {
//查询全部数据，调用的是models-->movie.js里面的方法
Movie.fetch(function(err, movies) {
if (err) {
console.log(err);
}
//将查询的数据返回到index.jade页面
res.render('index', {
title: 'demo1 首页',
movies: movies
});
});
});

//detail page
app.get('/movie/:id', function(req, res) {
//详情页面，获取request里面的id，根据id查询一条数据
var id = req.params.id;
Movie.findById(id, function(err, movie) {
res.render('detail', {
title: 'demo1' + movie.title,
id: id,
movie: movie
});
})
});

//admin page
app.get('/admin/movie', function(req, res) {
res.render('admin', {
title: 'demo1 后台录入页',
movie: {
_id: '',
doctor: '',
country: '',
title: '',
year: '',
poster: '',
language: '',
flash: '',
summary: ''
}
});
});

//admin update movie
app.get('/admin/update/:id', function(req, res) {
//获取request里面的id，根据id判断是修改
var id = req.params.id;
if (id) {
Movie.findById(id, function(err, movie) {
res.render('admin', {
title: 'demo1 后台更新页',
movie: movie
});
});
}
});

//admin delete movie
app.delete('/admin/list',function(req,res){
//根据id删除一条数据
var id = req.query.id;
if(id){
Movie.remove({_id:id},function(err,movie){
if(err){
console.log(err);
}else{
res.json({success:1});
}
});
}

})

//admin post movie
app.post('/admin/movie/new', function(req, res) {
console.log(req.body);
console.log(req.body.movie);
//获取数据对象，保存数据，新增。
var id = req.body.movie._id;
var movieObj = req.body.movie;
var _movie;
if (id !== undefined) {
Movie.findById(id, function(err, movie) {
if (err) {
console.log(err);
}
_movie = _.extend(movie, movieObj);
_movie.save(function(err, movie) {
if (err) {
console.log(err);
}
res.redirect('/movie/' + movie._id);
});
});
} else {
_movie = new Movie({
doctor: movieObj.doctor,
title: movieObj.title,
language: movieObj.language,
country: movieObj.country,
year: movieObj.year,
poster: movieObj.poster,
flash: movieObj.flash,
summary: movieObj.summary
});
_movie.save(function(err, movie) {
if (err) {
console.log(err);
}
res.redirect('/movie/' + movie._id);
});
}
});

//list page
app.get('/admin/list', function(req, res) {
//跟首页同样。
Movie.fetch(function(err, movies) {
if (err) {
console.log(err);
}
res.render('list', {
title: 'demo1 列表页',
movies: movies
});
});
});

3，删除数据写的是button，因此要对button写一个事件，在处理删除。mongoose

在bower_components下面新建js文件夹，而后新建admin.js。同时在list.jade下面引入 script(src="/js/admin.js")，注意缩进。ide

$(function(){
$('.del').click(
function(e){
var target = $(e.target);
var id = target.data('id');
var tr = $('.item-id-'+ id);
$.ajax({
type:'DELETE',
url:'/admin/list?id='+id
})
.done(function(reaults){
if(reaults.success===1){
if(tr.length>0){
tr.remove();
}
}
})
}
)
})

最后直接在完整图片预览一下吧post

转载本站文章请注明出处：爱开发 http://www.imlwj.com/blog/?p=66