[Node.js基础]学习①⑦--使用sequelize

http://www.liaoxuefeng.com/wiki/001434446689867b27157e896e74d51a89c25cc8b43bdb3000/001471955049232be7492e76f514d45a2180e2c224eb7a6000

mysql -u root -p

创建数据库

create database test;

show databases;

grant命令是创建MySQL的用户名和口令，均为www，并赋予操作test数据库的所有权限。

grant all privileges on test.* to 'www'@'%' identified by 'www';

use test;

创建表

create table pets (
    id varchar(50) not null,
    name varchar(100) not null,
    gender bool not null,
    birth varchar(10) not null,
    createdAt bigint not null,
    updatedAt bigint not null,
    version bigint not null,
    primary key (id)
) engine=innodb;

package.json

{
    "name": "hello-sequelize",
    "version": "1.0.0",
    "description": "Hello Sequelize example with async",
    "main": "app.js",
    "scripts": {
        "start": "node --use_strict app.js"
    },
    "keywords": [
        "sequelize",
        "async"
    ],
    "author": "Michael Liao",
    "license": "Apache-2.0",
    "repository": {
        "type": "git",
        "url": "https://github.com/michaelliao/learn-javascript.git"
    },
    "dependencies": {
        "sequelize": "3.24.1",
        "mysql": "2.11.1"
    }
}

config.js

var config={
    database:'test',
    username:'www',
    password:'www',
    host:'localhost',
    port:3306
};

module.exports=config;

app.js

const Sequelize = require('sequelize');
const config = require('./config');

var sequelize = new Sequelize(config.database, config.username, config.password, {
    host: config.host,
    dialect: 'mysql',
    pool: {
        max: 5,
        min: 0,
        idle: 300000
    }
});

var Pet = sequelize.define('pet', {
    id: {
        type: Sequelize.STRING(50),
        primaryKey: true
    },
    name: Sequelize.STRING(100),
    gender: Sequelize.BOOLEAN,
    birth: Sequelize.STRING(10),
    createdAt: Sequelize.BIGINT,
    updatedAt: Sequelize.BIGINT,
    version: Sequelize.BIGINT
}, {
        timestamps: false
    });

var now = Date.now();

Pet.create({
    id: 'g-' + now,
    name: 'Gaffey',
    gender: false,
    birth: '2007-07-07',
    createdAt: now,
    updatedAt: now,
    version: 0
}).then(function (p) {
    console.log('created.' + JSON.stringify(p));
}).catch(function (err) {
    console.log('failed:' + err);
});

(async () => {
    var dog = await Pet.create({
        id: 'd-' + now,
        name: 'Odie',
        gender: false,
        birth: '2008-08-08',
        createdAt: now,
        updatedAt: now,
        version: 0
    });
    console.log('created:' + JSON.stringify(dog));
})();

(async () => {
    var pets = await Pet.findAll({
        where: {
            name: 'Gaffey'
        }
    });
    console.log(`find ${pets.length} pets:`);
    for (let p of pets) {
        console.log(JSON.stringify(p));
        console.log('update pet...');
        p.gender = true;
        p.updatedAt = Date.now();
        p.version++;
        await p.save();
        if (p.version === 3) {
            await p.destroy();
            console.log(`${p.name} was destroyed.`);
        }
    }
})();

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