Where to define associations / relations when using Sequelize.js?

Question

The official documentation only deals with sample code which defines two separate models followed by association / relation code as follows .

var User = this.sequelize.define('user', {/* attributes */})
  , Company  = this.sequelize.define('company', {/* attributes */});

User.belongsTo(Company); // Will add companyId to user

My guesses are

1. Require all of the models and define associations in a separate file, then require that file from, say, app.js .
2. In each Model file, require needed models and define associations in classMethods.associate(models) .

and I can't really decide which one is a "right" way. I'm using Sequelize-CLI to generate migration files and model files.

Answer 1

After console.log ging models parameter in classMethods.associate(function(models) {}) , I've found out that it actually has all the Model classes.

You can access Model like models.ModelName and elaborate those to define associations and relations there.