Page 401 - Nodejs 교과서 개정2판

const User = require('./user');
const Post = require('./post');
const Hashtag = require('./hashtag');

const db = {};
const sequelize = new Sequelize(
config.database, config.username, config.password, config,
);

db.sequelize = sequelize;
db.User = User;
db.Post = Post;
db.Hashtag = Hashtag;

User.init(sequelize);
Post.init(sequelize);
Hashtag.init(sequelize);

User.associate(db);
Post.associate(db);
Hashtag.associate(db);

module.exports = db;

пп੄ ݽ؛ٜਸ द௬ۄ੉ૉ ё୓ী োѾ೮णפ׮ ੉ߣীח п ݽ؛ р੄ ҙ҅ܳ associate ೣࣻ উী ੿੄೧
ࠁѷणפ׮

models/user.js
...
static associate(db) {
db.User.hasMany(db.Post);
db.User.belongsToMany(db.User, {
foreignKey: 'followingId',
as: 'Followers',
through: 'Follow',
});
db.User.belongsToMany(db.User, {
foreignKey: 'followerId',
as: 'Followings',
through: 'Follow',
});
}
...