Correct way of doing relationships in sequelize model - node.js

Question

Recently we moved to Sequelize ORM from Knex due to which we have existing database to which models are map to . Everything working fine except model relationships.
So I have a users table and roles table. Each user can have one role but each role can be assigned to many users. To map these to models, I created model files that is as follows.
User Model:
const Sequelize = require('sequelize');
const sequelize = require('../utility/dbConnection');
const roles = require('./Roles');
module.exports = sequelize.define("User", {
id: {
type: Sequelize.INTEGER(11),
primaryKey: true,
autoIncrement: true,
allowNull: false
},
firstName: Sequelize.STRING(255),
middleName: Sequelize.STRING(255),
lastName: Sequelize.STRING(255),
email: {
type: Sequelize.STRING(255),
unique: true
},
phoneNumber: {
type: Sequelize.STRING(255),
unique: true
},
is_phonenumber_verified: {
type: Sequelize.BOOLEAN,
default: false
},
is_email_verified: {
type: Sequelize.BOOLEAN,
default: false
},
roleID: {
type: Sequelize.INTEGER
},
password: Sequelize.STRING(255)
// }, {
// defaultScope: {
// attributes: { exclude: ['password'] }
// }
}, {
tableName: 'users'
},{
classMethods: {
associate: function() {
this.hasOne(roles,{foreignKey: 'roleID'})
}
}
}
);
roles Model:
const Sequelize = require('sequelize');
const sequelize = require('../utility/dbConnection');
module.exports = sequelize.define("Role", {
id: {
type: Sequelize.INTEGER(11),
primaryKey: true,
autoIncrement: true,
allowNull: false
},
name: {
type: Sequelize.STRING(255),
unique: true
},
},{
tableName: 'roles'
});
Now in the controller file, I want to fetch user details and role name for which code snippet are as follows
const userModel = require('../../models/Users');
const rolesModel = require('../../models/Roles');
let user = await userModel.findOne({ where: { email: req.body.email } },{include:[{model:rolesModel}]});
The problem is it only fetches rolesID from the Users table but not roles name from roles table .
Can anyone help me on this what I am doing wrong here ?

Answer 1

You have To Write Your Include Condition Like This
const userModel = require('../../models/Users');
const rolesModel = require('../../models/Roles');
let user = await userModel.findOne({
where: {
email: req.body.email
},include:
[{ model: rolesModel }]
});
you can use belongsTo relation instead of using hasOne
add this relation in roles table and remove from users table
classMethods: {
associate: function() {
this.belongsTo(users,{foreignKey: 'roleID'})
}
}
You can see this Sequelize Associations docs to know more about Associations and relations