Initial commit

db/migrate/20180215124645_shorten_member_serial_number.rb

@@ -0,0 +1,17 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+class ShortenMemberSerialNumber < ActiveRecord::Migration[4.2]
+  def change
+    if defined?(Member)
+      Member.find_each do |member|
+        if member.sn.length > 12
+          member.sn = nil
+          member.send(:assign_sn)
+          member.save!
+        end
+      end
+    end
+    change_column :members, :sn, :string, null: false, limit: 12, index: true
+  end
+end