Error: XModel is not associated to Ymodel on Sequelizejs - node.js

Question

I have a few weeks working with Sequelize and I ran into this. I've already read other similar questions but nothing seems to help.
Let me show you my models:
Merchants.js
'use strict';
var Sequelize = require('sequelize');
var config = require(__base + '/server/config/config').provisioning;
var sequelize = new Sequelize(config.database, config.user, config.password, config);
var Merchants = sequelize.define('merchants', {
id: {
type: Sequelize.UUID,
primaryKey: true,
unique: true,
defaultValue: Sequelize.UUIDV4
},
name: {
type: Sequelize.STRING(255)
},
createdAt: {
type: Sequelize.DATE,
field: 'created_at'
},
//more attributes
}, {
classMethods: {
associate: function (models) {
Merchants.hasOne(models.Users, {foreignKey: 'merchantId'})
}
}
});
module.exports = Merchants;
Users.js
'use strict';
var Sequelize = require('sequelize');
var config = require(__base + '/server/config/config').provisioning;
var sequelize = new Sequelize(config.database, config.user, config.password, config);
var Users = sequelize.define('users', {
id: {
type: Sequelize.UUID,
primaryKey: true,
unique: true,
defaultValue: Sequelize.UUIDV4
},
merchantId: {
type: Sequelize.UUID,
field: 'merchant_id'
},
createdAt: {
type: Sequelize.DATE,
field: 'created_at'
},
// more attributes
}, {
classMethods: {
associate: function (models) {
Users.belongsTo(models.Merchants, { foreignKey: 'merchantId' });
}
}
});
module.exports = Users;
Then I'm trying to do this:
Users.findAll({
include: [{
model: Merchants,
where: { state: 'ACTIVATED' }
}]
}).then(function (users) {
console.log(users.length);
}).catch(function (err) {
console.log(err);
});
And I'm getting: [Error: merchants is not associated to users!]
I've done some of the stuff I've read in different questions but nothing seems to work. It might be a foolish thing, but as I said before, first time working with Sequelize.

Answer 1

Make sure that the associations are actually being set up - Do note that the associate method is not part of sequelize API, but is merely a common pattern - you have to make sure its actually called. For example with:
fs
.readdirSync(__dirname)
.filter(function(file) {
return (file.indexOf(".") !== 0) && (file !== "index.js");
})
.forEach(function(file) {
var model = sequelize.import(path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(function(modelName) {
if ("associate" in db[modelName]) {
db[modelName].associate(db);
}
});
https://github.com/sequelize/express-example/blob/master/models/index.js