我在sequelize.js中遇到了一个一对多关联的左外部联接问题

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

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

// 定义模型
class User extends Model {}
User.init({
  name: DataTypes.STRING,
}, { sequelize, modelName: 'user' });

class Post extends Model {}
Post.init({
  title: DataTypes.STRING,
}, { sequelize, modelName: 'post' });

// 定义关联关系
User.hasMany(Post);
Post.belongsTo(User);

// 查询数据
User.findAll({
  include: [{
    model: Post,
    required: false, // 左外部联接
  }],
}).then(users => {
  console.log(users);
}).catch(error => {
  console.error(error);
});