如何对嵌套对象和关系使用Sequelize create

npm install sequelize
npm install sequelize-cli
npm install mysql2

const Sequelize = require('sequelize');
const sequelize = new Sequelize('database', 'username', 'password', {
  host: 'localhost',
  dialect: 'mysql'
});

// 定义模型
const User = sequelize.define('user', {
  name: Sequelize.STRING,
  age: Sequelize.INTEGER
});

const Address = sequelize.define('address', {
  street: Sequelize.STRING,
  city: Sequelize.STRING,
  country: Sequelize.STRING
});

// 定义关系
User.hasMany(Address);
Address.belongsTo(User);

sequelize.sync().then(async () => {
  const user = await User.create({
    name: 'John Doe',
    age: 25,
    addresses: [
      { street: '123 Main St', city: 'New York', country: 'USA' },
      { street: '456 Elm St', city: 'Los Angeles', country: 'USA' }
    ]
  }, {
    include: [Address] // 包含关联模型
  });

  console.log(user.toJSON());
});

User.findOne({
  where: { name: 'John Doe' },
  include: [Address] // 包含关联模型
}).then(user => {
  console.log(user.toJSON());
});