app/models/finish.rb
# == Schema Information
#
# Table name: finishes
#
# id :integer not null, primary key
# description :string(255)
#
class Finish < ActiveRecord::Base
has_many :user_lacquer_finishes
has_many :user_lacquers, through: :user_lacquer_finishes
has_many :lacquers, through: :user_lacquers
validates :description, presence: true, uniqueness: true
end