Sequelize findAll with association and foreign key - mysql

Question

I'm using sequelize to model a mySql-database schema in my node-application. Let's say I have 3 table: Project, User and Role.
It's a "Many to Many" association between Project and User through "Project_User" where is defined the role of a user for a project.
Project Model :
var Project = sequelize.define('Project', {
name:{type: DataTypes.STRING, unique: true}
},
classMethods: {
associate: function(models) {
Project.belongsToMany(models.User, { through: 'Project_User', as: 'users'});
}
}
// Methods...
);
User Model :
var User= sequelize.define('User', {
name:{type: DataTypes.STRING, unique: true}
},
classMethods: {
associate: function(models) {
User.belongsToMany(models.Project, { through: 'Project_User', as: 'projects'});
}
}
// Methods...
);
And here is the association table Project_User Model :
var Project_User = sequelize.define('Project_User', {
role:
{
type: DataTypes.INTEGER,
allowNull: false,
references: 'Role',
referencesKey: 'id'
}
},{
classMethods: {
associate: function(models) {
Project_User.belongsTo(models.Role, {foreignKey: 'role'});
}
}
});
Now, I want to find all project, with their users and their role. So I've used findAll with the "include" parameters like below:
models.Projects.findAll({
include:[
{
model: models.User,
as:'users',
through: {attributes: ['role'], as: 'role'}
}]
}).then(function(result) {
// ...
});
This works great but I only have the roleId associated to the user. I wasn't be able to link this "roleId" with the role table to get the other attributes like role name...
Here is the JSON I've got :
[
{
"id": 1,
"name": "Project name",
"users": [
{
"id": 1,
"name": "User name",
"role": {
"role": 1
}
}
]
}
]
But I would like to have something like that :
[
{
"id": 1,
"name": "Project name",
"users": [
{
"id": 1,
"name": "User name",
"role": {
"id": 1,
"name": "Role name",
"description": "Some info...",
}
}
]
}
]
I've tried many things to realize this association, even successive includes but it was unsuccessful. What is needed in the findAll options to get this JSON result ?
Thanks

Answer 1

Assuming that your User model is linked to the Role model, something like this should work:
models.Projects.findAll({
include:[
{
model: models.User,
as:'users',
through: {attributes: []},
include: [models.Role]
}] }).then(function(result) {
// ... });