安装egg-mysql
npm install egg-mysql -S
在src/config/plugin.ts
添加配置代码如下
export default {
……
mysql: {
enable: true,
package: ‘egg-mysql‘,
}
……
} as EggPlugin;
在src/config/config.default.ts
添加配置代码如下
import { EggAppConfig, EggAppInfo, PowerPartial } from ‘midway‘;
export type DefaultConfig = PowerPartial<EggAppConfig>
export default (appInfo: EggAppInfo) => {
const config = <DefaultConfig> {};
……
config.mysql = {
// database configuration
client: {
// host
host: ‘127.0.0.1‘,
// port
port: ‘3306‘,
// username
user: ‘root‘,
// password
password: ‘123456‘,
// database
database: ‘yoye‘,
},
//load into app,default is open //加载到应用程序,默认为打开
app:true,
//load into agent,default is close //加载到代理中,默认值为“关闭”
agent:false,
}
……
return config;
};
在这里我们的mysql
里是存在名为yoye
的数据库,并且通过sql
语句新建了test
表,且存在一个name
字段,新建数据库并初始化测试表SQL
语句如下:
创建数据库,且编码为utf8
CREATE DATABASE `yoye` CHARACTER SET utf8 COLLATE utf8_general_ci;
创建数据表,且存在自增主键id
、字符串字段name
create table test(
id int not null auto_increment primary key,
name varchar(100) not null
);
向表中新增一条测试数据
insert into test (name) values(‘yoye‘);
在controller
中注入,代码如下
import { get, post } from ‘midway‘;
import { Context, controller, inject, provide, plugin } from ‘midway‘;
@provide()
@controller(‘/auth‘)
export class AuthController {
……
@plugin()
mysql;
……
}
接下来就可以通过this.mysql
愉快的使用了
条件查询,方法一
const result = await this.mysql.get("test", { id: 1 })
if (result != null) {
console.log(result.name);
}
条件查询,方法二
const result = await this.mysql.select("test", {
where: {
name: [‘yoye‘, ‘test‘], // 相当于 in
},
order: [[‘id‘, ‘desc‘], [‘name‘, ‘desc‘]]
})
if (result.length) {
console.log(result[0].name);
}
新增
const result = await this.mysql.insert("test", { name: "lisa" })
修改,方法一
const result = await this.mysql.update(‘test‘, { id: 2, name: ‘ella‘ });
console.log(result);
修改,方法二
const result = await this.mysql.query(‘update test set name = ? where id = ?‘, ["yooyea", 2]);
console.log(result);
删除
let result = await this.mysql.delete(‘test‘, { id: 2 });
console.log(result);
执行原生SQL
const sql = ‘select * from test limit ?‘
const values = [10]
this.mysql.query(sql, values).then((res:any)=>{
console.log(res);
})
Mysql事务
const conn = await this.mysql.beginTransaction();
try {
await conn.insert(‘test‘, { ‘name‘: ‘lisa‘ });
await conn.update(‘test‘, { id: 2, name: ‘ella‘ });
await conn.commit(); //提交事务
const result = await this.mysql.select("test", {})
console.log(result);
} catch (err) {
await conn.rollback();//回滚事务
throw err;
}
原文:https://www.cnblogs.com/sexintercourse/p/15268519.html