Initial commit

app/models/concerns/tid_identifiable.rb

@@ -0,0 +1,17 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+module TIDIdentifiable
+  extend ActiveSupport::Concern
+
+  included do
+    validates :tid, presence: true, uniqueness: { case_sensitive: false }
+
+    before_validation do
+      next unless tid.blank?
+      begin
+        self.tid = "TID#{SecureRandom.hex(5).upcase}"
+      end while self.class.where(tid: tid).any?
+    end
+  end
+end