Sequelize populate joined table attributes - mysql

Question

I have a few tables and I want to do some includes on a joined table, but I can't seem to figure it out. Here are my models:
/* Staff model */
const model = {
fisrName: {
type: DataTypes.INTEGER,
references: { model: 'Roles', key: 'id' },
},
lastName: {
type: DataTypes.INTEGER,
references: { model: 'Profiles', key: 'id' },
}
};
const Staff = createModel('Staff', model, { paranoid: true });
export default Staff
/* Service model */
const model = {
name: {
type: DataTypes.STRING,
},
category: {
type: DataTypes.STRING,
},
description: {
type: DataTypes.STRING,
}
};
const Service = createModel('Service', model, {});
export default Service;
/* Appointment model */
const model = {
endDate: {
type: DataTypes.DATE,
},
startDate: {
type: DataTypes.DATE,
},
day: {
type: DataTypes.DATE,
},
};
const Appointment = createModel('Appointment', model, {})
Appointment.belongsToMany(Service, { through: 'Products', as: 'products' });
export default Appointment;
/* Products model */
const model = {
serviceId: {
type: DataTypes.INTEGER,
},
appointmentId: {
type: DataTypes.INTEGER,
},
staffId: {
type: DataTypes.INTEGER,
references: { model: 'Staff', key: 'id' },
}
};
const Product = createModel('Product', model, {});
Product.belongsTo(Staff, { foreignKey: 'staffId', as: 'staff' });
export default Product;
This is my appointment query, where I include the services array, and on this services array, I have a Products object, and in this object I have a staffId that I want to populate, and I'm not sure how. I have tried different ways, but nothing worked.
const appointment = await Appointment.findByPk(req.params.id, {
include: [
{
model: Service,
as: 'services',
through: { attributes: { include: ['id', 'staffId', 'serviceId', 'appointmentId'], exclude: ['createdAt', 'updatedAt', 'AppointmentId', 'ServiceId'] },
},
],
});
And this is my response:
{
"startDate": "date",
"endDate": "date",
"day": "date",
"services": [{
"id": 1,
"name": "Service name",
"category": "service category",
"description": "service description",
"Products": {
"id": 1,
"staffId": 2,
"serviceId": 1,
"appointmentId": 1
}
}]
}
What I want is to do is to populate the staffId from Products with the model from the collection, something like this:
{
"startDate": "date",
"endDate": "date",
"day": "date",
"services": [{
"id": 1,
"name": "Service name",
"category": "service category",
"description": "service description",
"Products": {
"id": 1,
"staffId": {
"firstName": "First Name",
"lastName": "Last Name"
},
"serviceId": 1,
"appointmentId": 1
}
}]
}

Answer 1

const appointment = await Appointment.findByPk(req.params.id, {
include: [
{
model: Service,
as: 'services',
through: {
attributes: { include: ['id', 'staffId', 'serviceId', 'appointmentId'], exclude: ['createdAt', 'updatedAt', 'AppointmentId', 'ServiceId'] },
},
include: [{
as: 'Products', model: Product,
include: 'staff'
}]
}
]
});