koa+squelize连接数据库

准备连接数据库：

const Sequelize = require("sequelize");
const {dbName,host,user,password,port} = require("./config/index").database;
const sequelize = new Sequelize(dbName,user,password,{
    dialect:"mysql",
    port,
    host,
    logging:console.log,
    timezone:"+08:00"
});
sequelize.authenticate().then(()=>{
    console.log("数据库连接成功");
}).catch(()=>{
    console.log(‘数据库连接失败‘)
})
module.exports=sequelize;

建立模型：

1.使用sequelize.define:

const { Sequelize, DataTypes } = require(‘sequelize‘);

const sequelize = new Sequelize(‘sqlite::memory:‘);

const User = sequelize.define(‘User‘, {

// Model attributes are defined here

firstName: { type: DataTypes.STRING, allowNull: false }, l

astName: { type: DataTypes.STRING // allowNull defaults to true } },

{ // Other model options go here });

2.使用model:

const { Sequelize, DataTypes, Model } = require(‘sequelize‘);

const sequelize = new Sequelize(‘sqlite::memory‘);

class User extends Model {}

User.init({ // Model attributes are defined here

firstName: { type: DataTypes.STRING, allowNull: false },

lastName: { type: DataTypes.STRING // allowNull defaults to true } },

{ // Other model options go here

sequelize, // We need to pass the connection instance

modelName: ‘User‘ // We need to choose the model name });