如何在sequelize中在模型中声明外键

npm install sequelize sequelize-cli mysql2

npx sequelize-cli model:generate --name User --attributes name:string

const { Model, DataTypes } = require('sequelize');
const sequelize = require('../database');

class User extends Model {}

User.init({
  name: {
    type: DataTypes.STRING,
    allowNull: false
  }
}, {
  sequelize,
  modelName: 'User'
});

module.exports = User;

const { Model, DataTypes } = require('sequelize');
const sequelize = require('../database');
const User = require('./user');

class UserProfile extends Model {}

UserProfile.init({
  // 其他属性
  userId: {
    type: DataTypes.INTEGER,
    references: {
      model: User,
      key: 'id'
    }
  }
}, {
  sequelize,
  modelName: 'UserProfile'
});

User.hasOne(UserProfile);
UserProfile.belongsTo(User);

module.exports = UserProfile;

const { Model, DataTypes } = require('sequelize');
const sequelize = require('../database');
const User = require('./user');

class Task extends Model {}

Task.init({
  // 其他属性
  userId: {
    type: DataTypes.INTEGER,
    references: {
      model: User,
      key: 'id'
    }
  }
}, {
  sequelize,
  modelName: 'Task'
});

User.hasMany(Task);
Task.belongsTo(User);

module.exports = Task;