model/migration for promoted statuses

app/models/promotion.rb

@@ -0,0 +1,18 @@
+# == Schema Information
+#
+# Table name: promotions
+#
+#  id          :bigint(8)        not null, primary key
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#  expires_at  :datetime
+#  status_id   :bigint(8)        not null
+#  timeline_id :string
+#  position    :integer          default(10)
+#
+
+class Promotion < ApplicationRecord
+    belongs_to :status
+    
+    scope :active, -> { where('expires_at > ?', [Time.now]) }
+end