one-to-many relationship with sequelize - node.js

Question

I have 2 tables, users and users_signature where the signature takes several applications and I need to make a select according to the application.
Models:
user
const { INTEGER } = require('sequelize');
const Sequelize = require('sequelize');
const database = require('../../config/db');
const User_has_signature = require('./user_has_signature');
const Usuario = database.define('usuario', {
usu_id: {
type: Sequelize.INTEGER,
autoIncrement: true,
allowNull: false,
primaryKey: true
},
usu_rg: {
type: Sequelize.STRING,
},
},
{
freezeTableName: true,
createdAt: false,
updatedAt: false,
});
User.hasMany(User_has_signature, {as: 'user_has_signature'});
module.exports = User;
User_has_signature
const { INTEGER } = require('sequelize');
const Sequelize = require('sequelize');
const database = require('../../config/db');
const User_has_signature = database.define('user_has_signature', {
usu_has_signature_id: {
type: Sequelize.INTEGER,
autoIncrement: true,
allowNull: false,
primaryKey: true
},
user_usu_id: {
type: Sequelize.STRING,
},
signature_aplicativo_signature_aplicativo_id: {
type: Sequelize.STRING,
},
signature_type_signature_type_id: {
type: Sequelize.STRING,
},
},
{
freezeTableName: true,
createdAt: false,
updatedAt: false,
});
User_has_signature.associate = (models) => {
User_has_signature.belongsTo(models.User,
{ foreignKey: 'user_usu_id', as: 'users' });
};
module.exports = User_has_signature;
Controller
UserController
const User = require("../../model/user/user")
const User_has_signature = require("../../model/user/user_has_signature")
async index(req, res){
const user = await User.findAll({
include: [{
model: User_has_signature,
foreignKey: 'user_usu_id',
through: {
where: {signature_ttype_signature_type_id: 3}
}
}]
})
res.status(200).json(user)
return
}
The error that is returning to me in the terminal is: (node:15168)
UnhandledPromiseRejectionWarning: SequelizeEagerLoadingError:
user_has_signature is associated to usuario using an alias. You must
use the 'as' keyword to specify the alias within your include
statement

Answer 1

I think you have to specify the alias you have given when writing your query :
include: [{
model: User_has_signature,
foreignKey: 'user_usu_id',
as : 'users'
through: {
where: {signature_ttype_signature_type_id: 3}
}]
Either way I'm using Sequelize more in Typescript, so I'm not sure of the syntax.
The way it handles One to Many relationship isn't the clearest I've seen (Like Symfony or Spring)