mysql，sql server等数据库连接集成库

$3

``
$ npm install @fmfe/lib-sql

`

or

`
$ yarn add @fmfe/lib-sql
`

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有两种传入配置信息的方式:

##### 使用config来管理我们的配置文件.

假设我们的项目目录下有一个config目录,config目录里有一个dev.json文件.

> config/dev.json

`

{
"mysql": {
"host": "127.0.0.1",
"port": 3306,
"database": "test",
"user": "root",
"password": "123456"
},
"mssql": {
"user": "sa",
"password": "123456",
"server": "127.0.0.1",
"database": "test",
"port": 1433,
"pool": {
"min": 0,
"max": 10,
"idleTimeoutMillis": 3000
}
}
}

`

> mysql.js

`
const { mysql } = require('@fmfe/lib-sql');

const mysqlPool = mysql.init();

const _getNewSqlParamEntity = mysql._getNewSqlParamEntity;

// 执行单条sql语句
// mysql.exec(mysqlPool, sql, params);
async function exec() {
const sql1 = 'select * from ?? limit 2';
const data = await mysql.exec(mysqlPool, sql1, ['tbl_user']);
}

// 执行mysql事务,可以传入多条增/删/改sql语句
// mysql.exectrans(mysqlpool, sqlParamsEntity);
async function execTrans() {
const sqlParamsEntity = [];
const sql1 = 'insert into ?? (name, age, sex) values (?, ?, ?)';
const param1 = ['tbl_user', 'aaa', 20, 1];
sqlParamsEntity.push(_getNewSqlParamEntity(sql1, param1));

const sql2 = 'insert into ?? (name, age, sex) values (?, ?, ?)';
const param2 = ['tbl_user', 'bbb', 22, 0];
sqlParamsEntity.push(_getNewSqlParamEntity(sql2, param2));

const sql3 = 'update ?? set age = ? where id = ?';
const param3 = ['tbl_user', 10, 1];
sqlParamsEntity.push(_getNewSqlParamEntity(sql3, param3));
// ....
const data = await mysql.execTrans(mysqlPool, sqlParamsEntity);
}
`

> mssql.js

`
const { mssql } = require('@fmfe/lib-sql');
const _getNewSqlParamEntity = mssql._getNewSqlParamEntity;

// 执行单条语句
// mssql.exec(sql)
async function exec() {
const sql1 = 'select Top 3 name, age, sex from tbl_user order by age desc';
const data = await mssql.exec(sql1);
}

// 执行sql server 事务, 最好执行增/删/改语句,这里只是用select演示使用方法
// mssql.exectrans(sqlParamsEntity);
async function exectrans() {

const sqlParamsEntity = [];
const sql1 = 'select * from tbl_user where id = 1';
sqlParamsEntity.push(_getNewSqlParamEntity(sql1));

const sql2 = 'select * from tbl_user where id = 2';
sqlParamsEntity.push(_getNewSqlParamEntity(sql2));
// ...
const data = await mssql.execTrans(sqlParamsEntity);
}

`

由于使用config管理配置文件, 运行项目时通过使用命令: NODE_ENV=dev node ..., @fmfe/lib-sql即可自动获取到数据库相关配置.

##### 通过传入配置文件来调用库

我们引用上边的代码示例,只需做一点改动:

> mysql.js

只需在初始化时传入mysql数据库配置就好.

`
const { mysql } = require('@fmfe/lib-sql');

const mysqlPool = mysql.init({
host: '127.0.0.1',
port: 3306,
database: 'test',
user: 'root',
password: '123456'
});

......

`

> mssql.js

在每次调用方法时传入配置

`
const { mssql } = require('@fmfe/lib-sql');
const config = {
user: 'sa',
password: '123456',
server: '127.0.0.1',
database: 'test',
port: 1433,
pool: {
min: 0,
max: 10,
idleTimeoutMillis: 3000
}
}

async function exec() {
......
const data = await mssql.exec(sql1, config);
}

async function exectrans() {

......
const data = await mssql.execTrans(sqlParamsEntity, config);
}

`

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| 脚本 | 描述信息 |
|-------|----------|
|npm run lint| eslint检测代码|
|npm run lint:fix| 自动修复部分不符合eslint规范的代码|
|npm run test| 运行测试用例|
|npm run report| 生成html形式的测试报告 |

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git commit message 必须符合AngularJS Git Commit Message Conventions规范。

> 安装Commitizen工具

`
$ npm install -g commitizen
or
$ yarn global add commitizen
`

> 替换git commit 命令

`
$ git cz
``