Node.js简单的 MYSQL CRUD
直接进入主题了，使用Node.js 对mysql数据库表，进行增删改查。
在开始之前，说下开发环境
Ubuntu NPM,Express MYSQL For Node
以上环境搭建完成以后
来建立项目目录：
ubuntu@AcerXtimeline:~$ express hello_world
安装mysql支持：
ubuntu@AcerXtimeline:~/hello_world$ npm install mysql
安装 Express：
ubuntu@AcerXtimeline:~/hello_world$ npm install express-myconnection
下面就来写我们的CRUD了
-
创建mysql数据库表。这里例子就用 customer 字段有：id、name、address、email、phone;
-
打开app.js 添加上一些代码：
/** * Module dependencies. */ var express = require('express'); var routes = require('./routes'); var http = require('http'); var path = require('path'); //load customers route var customers = require('./routes/customers'); var app = express(); var connection = require('express-myconnection'); var mysql = require('mysql'); // all environments app.set('port', process.env.PORT || 4300); app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'ejs'); //app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.json()); app.use(express.urlencoded()); app.use(express.methodOverride()); app.use(express.static(path.join(__dirname, 'public'))); // development only if ('development' == app.get('env')) { app.use(express.errorHandler()); } /*------------------------------------------ connection peer, register as middleware type koneksi : single,pool and request -------------------------------------------*/ app.use( connection(mysql,{ host: 'localhost', user: 'root', password : '', port : 3306, //port mysql database:'nodejs' },'request') ); //route index, hello world app.get('/', routes.index); //route customer list app.get('/customers', customers.list); //route add customer, get n post app.get('/customers/add', customers.add); app.post('/customers/add', customers.save); //route delete customer app.get('/customers/delete/:id', customers.delete_customer); //edit customer route , get n post app.get('/customers/edit/:id', customers.edit); app.post('/customers/edit/:id',customers.save_edit); app.use(app.router); http.createServer(app).listen(app.get('port'), function(){ console.log('Express server listening on port ' + app.get('port')); });
下面就是 简单的增删改查操作，放在 routes/customers.js文件中
/*
* GET customers listing.
*/
exports.list = function(req, res){
req.getConnection(function(err,connection){
connection.query('SELECT * FROM customer',function(err,rows) {
if(err)
console.log("Error Selecting : %s ",err );
res.render('customers',{page_title:"Customers - Node.js",data:rows});
});
});
};
exports.add = function(req, res){
res.render('add_customer',{page_title:"Add Customers-Node.js"});
};
exports.edit = function(req, res){
var id = req.params.id;
req.getConnection(function(err,connection){
connection.query('SELECT * FROM customer WHERE id = ?',[id],function(err,rows)
{
if(err)
console.log("Error Selecting : %s ",err );
res.render('edit_customer',{page_title:"Edit Customers - Node.js",data:rows});
});
});
};
/*Save the customer*/
exports.save = function(req,res){
var input = JSON.parse(JSON.stringify(req.body));
req.getConnection(function (err, connection) {
var data = {
name : input.name,
address : input.address,
email : input.email,
phone : input.phone
};
var query = connection.query("INSERT INTO customer set ? ",data, function(err, rows)
{
if (err)
console.log("Error inserting : %s ",err );
res.redirect('/customers');
});
// console.log(query.sql); get raw query
});
};
exports.save_edit = function(req,res){
var input = JSON.parse(JSON.stringify(req.body));
var id = req.params.id;
req.getConnection(function (err, connection) {
var data = {
name : input.name,
address : input.address,
email : input.email,
phone : input.phone
};
connection.query("UPDATE customer set ? WHERE id = ? ",[data,id], function(err, rows)
{
if (err)
console.log("Error Updating : %s ",err );
res.redirect('/customers');
});
});
};
exports.delete_customer = function(req,res){
var id = req.params.id;
req.getConnection(function (err, connection) {
connection.query("DELETE FROM customer WHERE id = ? ",[id], function(err, rows)
{
if(err)
console.log("Error deleting : %s ",err );
res.redirect('/customers');
});
});
};
html 代码
<%- include layouts/header.ejs %>
<div class="page-data">
<div class="data-btn">
<button onClick="addUser();">+ Add</button>
</div>
<div class="data-table">
<table border="1" cellpadding="7" cellspacing="7">
<tr>
<th width="50px">No</th>
<th>Name</th>
<th>Address</th>
<th>Phone</th>
<th>Email</th>
<th width="120px">Action</th>
</tr>
<% if(data.length){
for(var i = 0;i < data.length;i++) { %>
<tr>
<td><%=(i+1)%></td>
<td><%=data[i].name%></td>
<td><%=data[i].address%></td>
<td><%=data[i].phone%></td>
<td><%=data[i].email%></td>
<td>
<a class="a-inside edit" href="../customers/edit/<%=data[i].id%>">Edit</a>
<a class="a-inside delete" href="../customers/delete/<%=data[i].id%>">Delete</a>
</td>
</tr>
<% }
}else{ %>
<tr>
<td colspan="3">No user</td>
</tr>
<% } %>
</table>
</div>
</div>
<%- include layouts/footer.ejs %>
启动项目
ubuntu@AcerXtimeline:~/hello_world$ node app.js
http://localhost:4300/customers