mysql, sql server database connectivity and other integrated library

Address: https://github.com/fmfe/lib-sql

Installation

1	$ npm install @fmfe/lib-sql

1	$ yarn add @fmfe/lib-sql

Usage

There are two ways of passing configuration information:

Use config to manage our profile.

Suppose you have a config directory under our project directory, config directory there is a dev.json file.

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;

// execute a single sql statement   
// mysql.exec (mysqlPool, sql, the params); 
the async function Exec () { 
    const SQL1 = 'SELECT * from limit ?? 2'; 
    const = Data mysql.exec the await (mysqlPool, SQL1, [ 'the tbl_user']); 
}

// Perform mysql transaction, it can be passed in a plurality of add / delete / change the sql statement 
// mysql.exectrans (mysqlpool, sqlParamsEntity); 
the async execTrans function () { 
    const sqlParamsEntity = []; 
    const SQL1 = 'INSERT INTO ?? ( name, Age, Sex) values (,,)??? '; 
    const the param1 = [' the tbl_user ',' AAA ', 20 is,. 1]; 
    sqlParamsEntity.push (_getNewSqlParamEntity (SQL1, the param1));

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

    SQL3 = const 'Update ?? SET ID = WHERE Age =??'; 
    const Param3 = [ 'the tbl_user', 10,. 1]; 
    sqlParamsEntity.push (_getNewS large column   mysql, sql server and the like connected to the integrated database library qlParamEntity (sql3, Param3)); 
    // .... 
    const = Data mysql.execTrans the await (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: