https://github.com/ubuntuvim/todos_server_v2
Todos project server program
https://github.com/ubuntuvim/todos_server_v2
Last synced: about 1 month ago
JSON representation
Todos project server program
- Host: GitHub
- URL: https://github.com/ubuntuvim/todos_server_v2
- Owner: ubuntuvim
- Created: 2015-11-22T16:49:39.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2015-12-10T17:56:18.000Z (over 10 years ago)
- Last Synced: 2023-02-27T03:32:36.224Z (over 3 years ago)
- Language: JavaScript
- Size: 45.9 KB
- Stars: 2
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
## 如何运行
Just clone the repository, run `npm install` and then `node server.js`. That's it :).
If you want to run it on another port, just run `PORT=3001 node server.js` to run it on port 3001 for example
## 项目目录
* app 后台程序文件夹
* test 单元测试
## 安装单元测试工具
```shell
npm install -g mocha
npm install supertest
```
**工具简介**
>Mocha是一个基于node.js和浏览器的集合各种特性的Javascript测试框架，并且可以让异步测试也变的简单和有趣。Mocha的测试是连续的，在正确的测试条件中遇到未捕获的异常时，会给出灵活且准确的报告。
### 运行测试
```shell
mocha fileName.js
```
### 参考网址
* https://github.com/ubuntuvim/node-mysql
* https://www.npmjs.com/package/mysql-wrapper
nodejs是如此强大！！！直接操作数据库也非常简单、快……
### 使用实例
#### 测试使用的数据库
```sql
SET NAMES utf8;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for `user`
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`timestamp` timestamp NULL DEFAULT NULL
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of `user`
-- ----------------------------
BEGIN;
INSERT INTO `user` VALUES ('1', 'ubuntuvim', '2015-11-22 17:50:30');
COMMIT;
SET FOREIGN_KEY_CHECKS = 1;
```
#### 测试代码
##### 获取数据库链接
```javascript
/**
* 后台服务，链接MySQL获取项目数据
*/
var mysql = require('mysql'); // 引入MySQL模块
var conn = mysql.createConnection({
host: '127.0.0.1',
user: 'root',
password: '',
// debug: true,
debug: ['RowDataPacket'],
database: 'todos'
});
```
##### 使用连接池
```javascript
// 使用连接池
var pool = mysql.createPool({
host: '127.0.0.1',
user: 'root',
password: '',
// debug: true,
database: 'todos'
});
pool.getConnection(function(err, conn) {
conn.query('select * from user', function(err, rows) {
console.log('>>>>>>>>>>> 使用连接池 >>>>>>>>>>>>>>>>>');
for (var i = 0; i < rows.length; i++) {
console.log('rows[i].id = ' + rows[i].id);
console.log('rows[i].username = ' + rows[i].username);
console.log('rows[i].timestamp = ' + rows[i].timestamp);
}
conn.release(); //释放连接，放回到连接池
// 甚至可以直接关闭连接池
conn.destroy();
});
});
```
##### 查询所有数据
```javascript
conn.connect(); //打开链接
conn.query('select * from user', function(err, rows, fields) {
if (err) throw err;
console.log('========= 查询所有数据 ===========');
for (var i = 0; i < rows.length; i++) {
console.log('rows[i].id = ' + rows[i].id);
console.log('rows[i].username = ' + rows[i].username);
console.log('rows[i].timestamp = ' + rows[i].timestamp);
}
// console.log('rows ' + rows[0].username);
// console.log('fields ' + fields);
});
conn.end(); //关闭连接
```
##### 多表关联查询
```javascript
// 多表连接查询
var options = { sql: 'select * from user u, todoItem td where u.id = td.user', nestTables: '_' };
conn.connect(); //打开链接
conn.query(options, function(err, results) {
if (err) throw err;
console.log('---------------- 多表连接查询 -------------------');
// console.log('results = ' + results);
// console.log('results[0] = ' + results[0]);
// 如果查询的时候使用nestTables: '_'分割属性名，那么查询也需要带表明前缀
// debug: ['RowDataPacket'] 连接时打开debug可以看到 打印的RowDataPacket信息
console.log('results[0].username = ' + results[0].u_username);
});
conn.end();
```
##### 查询某个字段值
```javascript
// 根据属性查
conn.connect(); //打开数据库连接
// 与jdbc操作数据库类似，也可以使用占位符
conn.query('select username from user where id = ?', [1], function(err, results, fields) {
if (err) throw err;
console.log("-------------- 查询某个字段值 ----------------");
for (var i = 0; i < results.length; i++) {
console.log('username = ' + results[i].username);
}
// field 包含的属性
// [ { catalog: 'def',
// db: 'todos',
// table: 'user',
// orgTable: 'user',
// name: 'username',
// orgName: 'username',
// charsetNr: 33,
// length: 150,
// type: 253,
// flags: 0,
// decimals: 0,
// default: undefined,
// zeroFill: false,
// protocol41: true } ]
//
console.log("-------------- 字段名称----------");
for (var i = 0; i < fields.length; i++) {
console.log('fields = ' + fields[i].name);
}
});
conn.end(); //关闭MySQL连接
```
##### 插入数据
```javascript
// 插入数据
console.log('------------- 插入数据 ------------');
conn.connect(); //打开连接
var user = { username: 'add test', timestamp: new Date() };
var query = conn.query('insert into user SET ?', user, function(err, result) {
if (err) throw err;
// 返回记录的id值
console.log('result = ' + result.insertId);
});
// 执行的sql为：insert into user SET `username` = 'add test', `timestamp` = '2015-11-22 22:23:36.768'
// 注意与常规insert语句语法的区别
console.log('sql: ' + query.sql); //
conn.end(); //关闭连接
```
##### 更新数据
```javascript
console.log('------------- 更新数据 ------------');
conn.connect(); //打开连接
var data = [ 'update test', 4 ]; //需要跟占位符的顺序一致
var query = conn.query('UPDATE user SET username = ? where id = ?', data, function(err, result) {
if (err) throw err;
// 返回被更新的行数
console.log('成功更新【' + result.changedRows + "】行数据。");
});
// 执行的sql为：UPDATE user SET username = 'update test' where id = 4
console.log('sql: ' + query.sql); //
conn.end(); //关闭连接
```
##### 删除数据
```javascript
console.log('------------- 删除数据 ------------');
conn.connect(); //打开连接
var data = [ 4 ]; //需要跟占位符的顺序一致
var query = conn.query('delete user where id = ?', data, function(err, result) {
if (err) throw err;
// 返回被更新的行数
console.log('成功删除【' + result.affectedRows + "】行数据。");
});
// 执行的sql为：delete from user where id = 4
console.log('sql: ' + query.sql); //
conn.end(); //关闭连接
```
**注意更新和删除获取的影响行数所使用的属性是不一样的。更新使用_changeRows_而删除使用_affectedRows_。**