Sequelize the nodejs throught model association - sql

Question

I have tree models User, Company and UserCompany.
I have associations
Company.belongsToMany(User, {
as: 'users',
through: {
model: UserCompany,
unique: false
},
onDelete: 'cascade'
});
User.belongsToMany(Company, {
as: 'companies',
through: {
model: UserCompany,
unique: false
},
onDelete: 'cascade'
});
I am trying to query companies buy runing this code
sql.Company.findAll({
where: query,
include: [{model:sql.User, as:'users', attributes: ['id', 'first_name', 'last_name', 'email']}],
order: sort,
limit: limit,
offset: offset
})
I have two elements of UserCompany with CompanyId=10 and UserId=50, but query returns only one of them.
It returns array
{id: 10,
...,
users: {
id: 50,
...,
UserCompany: {}
}
}
So UserCompany is not array, it is just one element. But I want to get them all.
How can I fix my association code?

Answer 1

Your associations are right. The UserCompany property isn't supposed to be showing all of each user's UserCompany relationships -- it's just showing the one that got the user included in that query's results.
If what you're looking for is a list of companies associated with each user in the returned array, you can add an include for that:
Company.findAll({
include: [{
model: User,
as: 'users',
attributes: ['id', 'first_name', 'last_name', 'email'],
// Add this
include: [{
model: Company,
as: 'companies',
attributes: ['id', 'name']
}],
}],
})
This gives you the following format in the returned array:
{
id: 1,
first_name: 'Nelson',
last_name: 'Bighetti',
email: 'bighead#hooli.com',
UserCompany: {...},
companies: [
{ id: 1, name: 'Hooli', UserCompany: {...} },
{ id: 2, name: 'Pied Piper', UserCompany: {...} }
]
}