nodejs使用Sequelize框架操做數據庫

sequelize.define

使用該方法能夠定義model，例子以下：html

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
});

該方法傳入的第一個參數是數據表的單數形式，怎麼理解呢？例如這裏傳入的是website實際上是模型名，數據表默認是websites這樣的複數形式，這種約定我在Laravel中也遇見過，也就是常說的，約定大於定義，也就是說，若是咱們都按照約定的規範去開發，那麼效率其實比從新定義，要高不少。那麼，定義好了模型，該怎麼進行使用呢？mysql

(async () => {
    let demo = await Website.create({
       url:'http://www.xxxx.com/',
       title:'demo'
    });
    console.log(demo);
})();

繼承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
 * 數據表websites的關係對象映射
 */
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;

我比較推薦使用繼承Model這種方式，經過建立一個class，這樣能夠使用model.exports=模塊名的方式，將該模型封裝起來。供別的地方使用，只須要require進去便可。web

具體如何對數據表進行操做，就比較簡單了，只須要參考API便可。sequelize文檔地址sql

炒雞辣雞原創文章，轉載請註明來源async