javascript - 无法在 Sequelize 中使用类模型在数据库中创建表

Question

我正在使用带有 express 和 sequelize 的 node.js，我的数据库是 mysql。
我尝试创建文档中所写的类模型: https://sequelize.org/master/manual/model-basics.html 。我能够连接到数据库，但无法弄清楚如何将模型与数据库同步以创建表。这是我的用户模型:

const { DataTypes, Model } = require('sequelize');
const connection = require("../server");

export class User extends Model { }

User.init({
    id: {
        type: DataTypes.BIGINT,
        autoIncrement: true,
        primaryKey: true,
        unique: true,
        allowNull: false
    },
    username: {
        type: DataTypes.STRING,
        allowNull: false,
        unique: true,
    },
    password: {
        type: DataTypes.STRING,
        allowNull: false,
    },
    userType: {
        type: DataTypes.STRING,
        allowNull: false,
    }
}, {
    connection
});

这是我的 server.js:

const express = require("express");
const Sequelize = require("sequelize");

const app = express();
const port = 8080;

const connection = new Sequelize("coupons2", "root", "1234", {
    host: "localhost",
    dialect: "mysql"
})

connection.sync()
    .then(() => {
        console.log("Connection to DB was successful");
    })
    .catch(err => {
        console.error("Unable to connect to DB", err);
    });

app.listen(port, () => {
    console.log(`Server is running on port ${port}`);
})

module.exports = connection;

谢谢!

Answer 1

我想你忘了要求 Sequelize 如你上面提到的文档中所示

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

如果您希望它由模型自动创建表，您可以在项目中使用 sequelize.sync

await sequelize.sync({ force: true });
console.log("All models were synchronized successfully.");