Sequelize especial methods don't get created when Using sequelize migrations - node.js

Question

I am struggling when using sequelize migrations and a many-to-many relationship between Users and Roles.
This is the Users model:
'use strict';
module.exports = (sequelize, DataTypes) => {
const user = sequelize.define('Users', {
username: DataTypes.STRING,
name: DataTypes.STRING,
email: DataTypes.STRING,
password: DataTypes.STRING
}, {});
user.associate = function(models) {
// associations can be defined here
user.belongsToMany(models.Roles, {
through: models.UserRoles
});
};
return user;
};
This is the Roles model:
'use strict';
module.exports = (sequelize, DataTypes) => {
const role = sequelize.define('Roles', {
name: DataTypes.STRING
}, {});
role.associate = function(models) {
// associations can be defined here
role.belongsToMany(models.Users, {
through: models.UserRoles
});
};
return role;
};
This is the "create-user" migration:
'use strict';
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('Users', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
username: {
type: Sequelize.STRING,
allowNull: true,
len: [0, 20]
},
name: {
type: Sequelize.STRING,
allowNull: true,
},
email: {
type: Sequelize.STRING,
allowNull: false
},
password: {
type: Sequelize.STRING,
allowNull: false
},
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('Users');
}
};
This is the "create-role" migration:
'use strict';
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('Roles', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
name: {
type: Sequelize.STRING
},
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('Roles');
}
};
This is the userRoles Model:
'use strict';
module.exports = (sequelize, DataTypes) => {
const user_role = sequelize.define('UserRoles', {
userId: DataTypes.INTEGER,
roleId: DataTypes.INTEGER
}, {});
user_role.associate = function(models) {
// associations can be defined here
};
return user_role;
};
And last one the "user-roles" migration:
'use strict';
module.exports = {
up: (queryInterface, Sequelize) => {
return queryInterface.createTable('UserRoles', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
userId: {
primaryKey: true,
type: Sequelize.INTEGER,
allowNull: false,
references: {
model: 'Users',
key: 'id'
}
},
roleId: {
primaryKey: true,
type: Sequelize.INTEGER,
allowNull: false,
references: {
model: 'Roles',
key: 'id'
}
},
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
});
},
down: (queryInterface, Sequelize) => {
return queryInterface.dropTable('UserRoles');
}
};
The problem happens when I try to access to the user.setRoles() from a controller:
exports.signup = (req, res) => {
console.log('creating new user', req.body.username);
// Save User to Database
User.create({
username: req.body.username,
email: req.body.email,
password: bcrypt.hashSync(req.body.password, 8)
})
.then(user => {
console.log('USER ADDED');
if (req.body.roles) {
Role.findAll({
where: {
name: {
[Op.or]: req.body.roles
}
}
}).then(roles => {
console.log('ROLES ', roles);
user.setRoles(roles).then(() => {
res.send({ message: "User was registered successfully!" });
});
});
} else {
console.log('NO ROLES > Normal User');
// user role = 1
user.setRoles([1]).then(() => {
res.send({ message: "User was registered successfully!" });
});
}
})
.catch(err => {
console.log('ERROR: ', err);
res.status(500).send({ message: err.message });
});
};
When I console.log the user using : console.log(Object.keys(user.__proto__)) I get this array where the special methods haven't been created, any idea what I am doing wrong?
Array(7) ["_customGetters", "_customSetters", "validators", "_hasCustomGetters", "_hasCustomSetters", "rawAttributes", "_isAttribute"]
Many thanks for your help!

Answer 1

Just call all associate functions after registering models. For instance:
const models = path.join(__dirname, 'models')
const db = {}
fs.readdirSync(models)
.filter(function (file) {
return (file.indexOf('.') !== 0) && (file.slice(-3) === '.js')
})
.forEach(function (file) {
var model = sequelize['import'](path.join(models, file))
db[model.name] = model
})
Object.keys(db).forEach(function (modelName) {
if (db[modelName].associate) {
db[modelName].associate(db)
}
})