Sequelize - how to get all Employees for all Locations

Question

I'll preface this by saying I think my model associations may be incorrect

Basically what i'm trying to do is is return an array of all Employees for a company.

• Get all locations that have the same companyId
• With those locations, get all Profiles tied to the locationId.

Profiles are linked to Locations through Employees.

Below is my code.

The query:

 Location.findAll({
        where: { companyId: user.profile.companyId },
        include: [
            {
                model: Employee
            }
        ]
    })

This generates the error "employee is not associated to location!" .

My models:

Employee.belongsTo(Profile)
Employee.belongsTo(Location)

Profile.belongsTo(Company)
Location.belongsTo(Company)

Profile.belongsToMany(Location, {
    through: Employee,
    foreignKey: "profileId"
})

Location.belongsToMany(Profile, {
    through: Employee,
    foreignKey: "locationId"
})

EDIT:

Adding Location.hasMany(Employee) allows me to do the query however it still requires a for loop within another for loop to get the correct data structure needed.

const locations = await models.Location.findAll({
        where: { companyId: user.profile.companyId },
        include: [{ model: models.Profile }]
    })

    const response = []

    locations.forEach(location => {
        location.profiles.forEach(profile => {
            response.push({ location, profile })
        })
    })

    return response

The query below returns what exactly as is however its only for a single location. I need to run the same query but for multiple locations.

Employee.findAll({ where: { locationId }, include: [Profile, Location] })

Answer 1

You've specified that Location belongsToMany Locations, but you've failed to specify the other way around. You should specify that a Location hasMany Employees.

Specifying Employee.belongsTo(Location) allows you to include related Locations with Employees. Specifying Location.hasMany(Employee) allows you to include related Employees with Locations.

I was able to recreate your problem and fix it with this line.

Location.hasMany(Employee, {
    //...
})