Events: kickstart shared scoreboard

app/models/event.rb

@@ -6,6 +6,7 @@
 #  lang              :string           default("en")
 #  name              :string
 #  shared_scoreboard :boolean
+#  slug              :string
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
 #  user_id           :integer          not null
@@ -19,8 +20,13 @@
 #  user_id  (user_id => users.id)
 #
 class Event < ApplicationRecord
+  extend FriendlyId
+
   belongs_to :user
   has_many :contests, dependent: :destroy
 
+  friendly_id :name, use: :slugged
+
   validates :name, presence: true
+  validates :lang, inclusion: { in: Languages::AVAILABLE_LANGUAGES.map { |lang| lang[:id] } }
 end