Add ranking mode

app/models/contest.rb

@@ -8,6 +8,7 @@
 #  name               :string
 #  offline_form       :boolean          default(FALSE)
 #  public             :boolean          default(FALSE)
+#  ranking_mode       :string
 #  slug               :string
 #  team               :boolean          default(FALSE)
 #  created_at         :datetime         not null
@@ -38,6 +39,7 @@ class Contest < ApplicationRecord
 
   validates :name, presence: true
   validates :lang, inclusion: { in: Languages::AVAILABLE_LANGUAGES.map { |lang| lang[:id] } }
+  validates :ranking_mode, inclusion: { in: Ranking::AVAILABLE_RANKING_MODES.map { |lang| lang[:id] } }
 
   generates_token_for :token
 end