Correctly order participants

app/models/contestant.rb

@@ -6,6 +6,7 @@
 #  display_time :string
 #  email        :string
 #  name         :string
+#  time_seconds :integer
 #  created_at   :datetime         not null
 #  updated_at   :datetime         not null
 #  contest_id   :integer          not null
@@ -22,5 +23,14 @@ class Contestant < ApplicationRecord
   belongs_to :contest
   has_many :completions
 
+  before_create :initialize_time_seconds
+
   validates :name, presence: true
+  validates :time_seconds, presence: true
+
+  private
+
+  def initialize_time_seconds
+    self.time_seconds = 0
+  end
 end