NodeJS + Sequelize / How to perform triple model query? - node.js

Question

I come from this topic:
NodeJS & Sequelize: How can I join 3 models?
I come to you now, because I need someone who can teach me about how to get started on junction models with NodeJS and Sequelize.
What I'm trying to do is, having 2 main models, for example, Employee and Office, a 3rd model called EmployeeOffice enters and connects the 2 main models, including its own field called "employee_chair". When i call a method, for example, Office.findAll, this is what I would get:
{
"id": 1,
"office_name": "Mars"
"office_color": "Red",
"createdAt": "2021-09-30T18:53:38.000Z",
"updatedAt": "2021-09-30T18:53:38.000Z",
"employees": [
{
"id": 1,
"employee_name": "Albert",
"employee_mail": "qalbert443#gmail.com",
"createdAt": "2021-09-30T18:53:45.000Z",
"updatedAt": "2021-09-30T18:53:45.000Z",
"employee_office": {
"createdAt": "2021-09-30T18:53:45.000Z",
"updatedAt": "2021-09-30T18:53:45.000Z"
}
}
]
}
NOW. What I need, is to have the model called instead of the junction table that is automatically created. Because I can join the 3 tables, but the 3rd table has the field "employee_chair", that I mentioned earlier. The desired response would look like this:
{
"id": 1,
"office_name": "Mars"
"office_color": "Red",
"createdAt": "2021-09-30T18:53:38.000Z",
"updatedAt": "2021-09-30T18:53:38.000Z",
"employees": [
{
"id": 1,
"employee_name": "Albert",
"employee_mail": "qalbert443#gmail.com",
"createdAt": "2021-09-30T18:53:45.000Z",
"updatedAt": "2021-09-30T18:53:45.000Z",
"employee_office": {
"employee_chair": 3,
"createdAt": "2021-09-30T18:53:45.000Z",
"updatedAt": "2021-09-30T18:53:45.000Z"
}
}
]
}
How can I do to make (or force) sequelize to make the relations through the model and not through the automatically created table?
Hope you guys can help me, I'm stuck and I don't know where to ask
#cupid22 Here is my index.js, userproject model and the controller function im calling:
index.js:
const dbConfig = require("../config/db.config.js");
const Sequelize = require("sequelize");
const sequelize = new Sequelize(dbConfig.DB, dbConfig.USER, dbConfig.PASSWORD, {
host: dbConfig.HOST,
dialect: dbConfig.dialect,
operatorsAliases: false,
pool: {
max: dbConfig.pool.max,
min: dbConfig.pool.min,
acquire: dbConfig.pool.acquire,
idle: dbConfig.pool.idle
}
});
const db = {};
db.Sequelize = Sequelize;
db.sequelize = sequelize;
db.projects = require("./project.model.js")(sequelize, Sequelize);
db.users = require("./user.model.js")(sequelize, Sequelize);
db.projects.belongsToMany(db.users, {
through: "users_projects",
as: "users",
foreignKey: "user_id",
});
db.users.belongsToMany(db.projects, {
through: "users_projects",
as: "projects",
foreignKey: "project_id",
});
module.exports = db;
Controller function:
// Retrieve all Projects from the database.
exports.findAll = (req, res) => {
const title = req.query.title;
var condition = title ? { title: { [Op.like]: `%${title}%` } } : null;
Project.findAll({
include: [
{
model: User,
as: "users",
}]
})
.then(data => {
res.send(data);
})
.catch(err => {
res.status(500).send({
message:
err.message || "Some error occurred while retrieving projects."
});
});
};
UserProject Model:
module.exports = (sequelize, Sequelize) => {
const UserProject = sequelize.define('user_project', {
user_id: {
type: Sequelize.INTEGER,
references: {
model: 'user',
key: 'id'
}
},
project_id: {
type: Sequelize.INTEGER,
references: {
model: 'project',
key: 'id'
}
},
user_type: {
type: Sequelize.INTEGER,
}
}, {
timestamps: false,
tableName: 'users_projects'
});
db.users.belongsToMany(db.projects, { through: User_Profile });
db.projects.belongsToMany(db.users, { through: User_Profile });
return UserProject;
};