class TournamentGroup < ApplicationRecord
  belongs_to :tournament
  has_many :participants, class_name: "TournamentParticipant", foreign_key: :group_id, dependent: :nullify
  has_many :matches, dependent: :nullify

  validates :name, presence: true
  validates :position, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
end