# == Schema Information # # Table name: categories # # id :integer not null, primary key # name :string # created_at :datetime not null # updated_at :datetime not null # contest_id :integer not null # # Indexes # # index_categories_on_contest_id (contest_id) # # Foreign Keys # # contest_id (contest_id => contests.id) # class Category < ApplicationRecord belongs_to :contest has_and_belongs_to_many :contestants validates :name, presence: true end