Sequelize.js onDelete: ‘cascade’ is not deleting records sequelize

I believe you are supposed to put the onDelete in the Category model instead of in the products model.

module.exports = function(sequelize, DataTypes) {
  var Category = sequelize.define('Category', {
    name: { type: DataTypes.STRING, allowNull: false }
  }, {
    associate: function(models) {
      Category.hasMany(models.Product, { onDelete: 'cascade' });
    }
  });
  return Category
}