sequelize.define
应用该办法能够定义model，例子如下：
const Sequelize = require('sequelize');var sequelize = new Sequelize(config.database, config.username, config.password, { host: config.host, dialect: 'mysql', pool: { max: 5, min: 0, idle: 30000 }});var Website = sequelize.define('website', { id: { type: Sequelize.BIGINT, primaryKey: true, autoIncrement: true }, url: Sequelize.STRING(255), title: Sequelize.STRING(255), status: Sequelize.INTEGER, delete_mark: Sequelize.BOOLEAN}, { timestamps: false});该办法传入的第一个参数是数据表的复数模式，怎么了解呢？例如这里传入的是website其实是模型名，数据表默认是websites这样的复数模式，这种约定我在Laravel中也碰见过，
也就是常说的，约定大于定义，也就是说，如果咱们都依照约定的标准去开发，那么效率其实比从新定义，要高很多。
那么，定义好了模型，该怎么进行应用呢？
(async () => { let demo = await Website.create({ url:'http://www.xxxx.com/', title:'demo' }); console.log(demo);})();继承Model
const {Sequelize, DataTypes, Model} = require('sequelize');const config = require('../config');const sequelize = new Sequelize(config.database, config.username, config.password, { host: config.host, dialect: 'mysql', pool: { max: 5, min: 0, idle: 30000 }});/** * @author chaojilaji * 数据表websites的关系对象映射 */class WebSite extends Model {}WebSite.init({ id: { type: Sequelize.BIGINT, primaryKey: true, autoIncrement: true }, url: Sequelize.STRING(255), title: Sequelize.STRING(255), status: Sequelize.INTEGER, delete_mark: Sequelize.BOOLEAN}, { sequelize, modelName: 'Website', timestamps:false});(async () => { await sequelize.sync(); let x = await WebSite.create({ url: 'http://www.xxxxxxxx.com/', title: 'demo2' }); console.log(x);})();module.exports = WebSite;我比拟举荐应用继承Model这种形式，通过创立一个class，这样能够应用model.exports=模块名的形式，将该模型封装起来。供别的中央应用，只须要require进去即可。
具体如何对数据表进行操作，就比较简单了，只须要参考API即可。sequelize文档地址
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