class TournamentRound < ApplicationRecord
  KINDS = %w[round_of_16 quarterfinal semifinal final third_place].freeze

  belongs_to :tournament
  has_many :matches, dependent: :nullify

  validates :kind, inclusion: { in: KINDS }
  validates :name, presence: true
  validates :position, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
end