Sequelize multiple joins for fetching data - mysql

Question

I am working on a CRUD application with Sequelize and ExpressJS that has the following tables:
Parents
Students
ParentStudents
id
id
id
name
name
idParent
idStudent
I want to query the Parents table and have students key created by a left join between students and ParentStudents on idParent;
I want to get data in the following way:
{
"data":[
{
"name":"nameParent2",
"students":[
{
"name":"Student1"
},
{
"name":"Student2"
}
]
},
{
"name":"nameParent2",
"students":[
{
"name":"Student1"
},
{
"name":"Student2"
}
]
}
]
}
I tried something like this, but is wrong and giving data from ParentStudents:
models.parents.findAll({
include: [{
model: models.parentStudents
}]
}).then(data => {
res.json({
message: "Hello from server!!!",
data: data
});
});
Like this is failing to make the association between Students and ParentStudents. (students is not associated to parentStudents!)
models.parents.findAll({
include: [{
model: models.parentStudents,
include: [{
model: models.students
}]
}]
}).then(data => {
res.json({
message: "Hello from server!!!",
data: data
});
});
My relationships are done like this:
db.parents.hasMany(db.parentStudents);
db.students.hasMany(db.parentStudents);
I also tried Many-to-Many, but still doesn't work:
db.students.belongsToMany(db.parents, { through: db.parentStudents });
db.parents.belongsToMany(db.students, { through: db.parentStudents });
Does someone know how this can be done?

Answer 1

One workaround is:
let parents = await models.parents.findAll();
for (let parent of parents) {
let idParent = parent.dataValues.id;
let students = await models.sequelize.query(`
SELECT * FROM students s
LEFT JOIN parentStudents ps
ON s.id = ps.studentId
WHERE ps.parentId =${idParent};
`);
parent.dataValues['students'] = students;
}